UITableView scrolls too far when editing embedded UITextView - iphone

I've successfully embedded a UITextView inside a UITableViewCell, and most of the table is working fine. However, when I enable editing on the UITextView and start editing, the table shifts up too far, obscuring the cursor. Is there a way to control how far the tableview scrolls? Manually scrolling the view to the cell works, but the view still scrolls up before scrolling back down and into view.
Here is an example of what I mean:
editing a UITextField - the field is neatly placed directly above the keyboard.
http://imageshack.us/photo/my-images/13/textfield.png/
editing a UITextView - the field is placed significantly above the keyboard removing the toolbar from the keyboard doesn't affect anything)
http://imageshack.us/photo/my-images/809/textview.png/
Here's all the code that is relevant to the UITextView in the UITableViewController object:
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.rightBarButtonItem = self.editButtonItem;
[[NSNotificationCenter defaultCenter] addObserver: self
selector: #selector(keyboardWillShow:)
name: UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver: self
selector: #selector(keyboardWillHide:)
name: UIKeyboardWillHideNotification object:nil];
}
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
viewTargetedForEditing = (UIView *)textView;
return YES;
}
- (void)textViewDidBeginEditing:(UITextView *)textView
{
[self.navigationController setNavigationBarHidden:YES animated:YES];
// shrink the textView to fit on-screen
originalTextViewFrame = textView.frame;
CGRect keyboardRect = [[keyboardUserinfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGFloat keyboardHeight = keyboardRect.size.height;
CGRect newViewFrame = textView.frame;
CGFloat spaceAboveKeyboard = self.containerView.frame.size.height - keyboardHeight;
newViewFrame.size.height = (spaceAboveKeyboard < textView.frame.size.height) ? spaceAboveKeyboard : textView.frame.size.height;
/* animate the calculations */
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:[[keyboardUserinfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]];
textView.frame = newViewFrame;
[UIView commitAnimations];
// recalculate the keyboard height, in case we aren't in portrait mode
CGFloat toolbarHeight;
if (UIInterfaceOrientationIsPortrait(self.interfaceOrientation)) {
toolbarHeight = 44.0;
} else {
toolbarHeight = 32.0;
}
CGRect frame = textView.inputAccessoryView.frame;
frame.size.height = toolbarHeight;
}
- (void)endTextViewEditing
{
[viewTargetedForEditing resignFirstResponder];
}
- (void)textViewDidEndEditing:(UITextView *)textView
{
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
#pragma mark - Keyboard Notifications
- (void)keyboardWillShow:(NSNotification *)notification
{
[keyboardUserinfo release];
keyboardUserinfo = [[notification userInfo] retain];
[self viewDidBeginEditing:viewTargetedForEditing];
}
- (void)keyboardWillHide:(NSNotification *)notification
{
[keyboardUserinfo release];
keyboardUserinfo = [[notification userInfo] retain];
[self viewDidEndEditing:viewTargetedForEditing];
}
- (void)viewDidBeginEditing:(id)aView
{
// called 2nd
UITableViewCell *cell = (UITableViewCell *)[aView superview];
[self.tableView scrollToRowAtIndexPath:[self.tableView indexPathForCell:cell] atScrollPosition:UITableViewScrollPositionTop animated:YES];
}
- (void)viewDidEndEditing:(id)aView
{
NSIndexPath *indexPath = [self.tableView indexPathForCell:(UITableViewCell *)[viewTargetedForEditing superview]];
gallupAppDelegate *appDelegate = (gallupAppDelegate *)[[UIApplication sharedApplication] delegate];
switch (indexPath.section) {
case SectionDescription:
if (![[(UITextField *)aView text] isEqualToString:self.plan.Description]) {
self.plan.Description = [(UITextField *)aView text];
[appDelegate saveManagedContext];
}
break;
case SectionNotes:
if (![[(UITextView *)aView text] isEqualToString:self.plan.Notes]) {
self.plan.Notes = [(UITextView *)aView text];
[appDelegate saveManagedContext];
}
break;
case SectionLocation:
if (![[(UITextField *)aView text] isEqualToString:self.plan.Location]) {
self.plan.Location = [(UITextField *)aView text];
[appDelegate saveManagedContext];
}
break;
}
}
The TextViewCell is a subclass of UITableViewCell, and it is the cell that is giving me the problem with scrolling.Here's the implementation:
#implementation TextViewCell
#synthesize contents=_contents;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
_contents = [[UITextView alloc] initWithFrame:CGRectZero];
[self addSubview:_contents];
self.contents.font = [UIFont systemFontOfSize:17];
self.contents.dataDetectorTypes = UIDataDetectorTypeAll;
CGRect frame = CGRectMake(0, 0, self.window.frame.size.width, 44.0);
UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *done = [[UIBarButtonItem alloc] initWithTitle:#"Done" style:UIBarButtonItemStyleDone target:self action:#selector(endTextViewEditing)];
UIToolbar *textViewToolbar = [[UIToolbar alloc] initWithFrame:frame];
textViewToolbar.barStyle = UIBarStyleBlackOpaque;
[textViewToolbar setItems:[NSArray arrayWithObjects:spacer, done, nil]];
self.contents.inputAccessoryView = textViewToolbar;
}
return self;
}
- (void)endTextViewEditing
{
[self.contents resignFirstResponder];
}
#define LEFT_MARGIN 15
#define TOP_MARGIN 5
- (void)layoutSubviews
{
[super layoutSubviews];
CGFloat width = self.frame.size.width - (LEFT_MARGIN *2);
CGFloat height = self.frame.size.height - (TOP_MARGIN *2);
self.contents.frame = CGRectMake(LEFT_MARGIN, TOP_MARGIN, width, height);
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
//[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
- (void)dealloc
{
[super dealloc];
}
#end

As it turns out, subclassing the UITableView and implementing the following fixed the problem:
- (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated
{
[super setContentOffset:contentOffset animated:animated];
return;
static int i = 0;
if (0 == i) {
i++;
} else {
i = 0;
[super setContentOffset:contentOffset animated:animated];
}
return;
}
Apparently the -setContentOffset:animated: message was sent 2x, and if the first one is allowed to run the second time round doesn't do it's job properly.
Does anyone have any insite as to why this would fix the problem?

Related

App crash on click of tab button second time [closed]

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Questions concerning problems with code you've written must describe the specific problem — and include valid code to reproduce it — in the question itself. See SSCCE.org for guidance.
Closed 9 years ago.
Improve this question
In my app i have tab bar and in it there is three tab button. but on one of it when i pressed it second time it crash the app. Other button are working fine.
This is the .m file code
-(void)viewWillAppear:(BOOL)animated
{
scrollView.contentSize = CGSizeMake(320, 500);
[super viewWillAppear:YES];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(#"Contact Us", #"Contact Us");
self.tabBarItem.image = [UIImage imageNamed:#"contactTab.png"];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
[self.navigationController.navigationBar setTintColor:[UIColor blackColor]];
scrollView.contentSize = CGSizeMake(320, 500);
scrollView.scrollEnabled = YES;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.view endEditing:YES];
}
-(BOOL) textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
[textView becomeFirstResponder];
return YES;
}
- (void)keyboardWasShown:(NSNotification *)notification
{
// Step 1: Get the size of the keyboard.
CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
// Step 2: Adjust the bottom content inset of your scroll view by the keyboard height.
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize.height, 0.0);
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
// Step 3: Scroll the target text field into view.
CGRect aRect = self.view.frame;
aRect.size.height -= keyboardSize.height;
if (!CGRectContainsPoint(aRect, self.activeTextField.frame.origin) )
{
CGPoint scrollPoint = CGPointMake(0.0, self.activeTextField.frame.origin.y - (keyboardSize.height-15));
[scrollView setContentOffset:scrollPoint animated:YES];
}
}
- (void) keyboardWillHide:(NSNotification *)notification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
}
// Set activeTextField to the current active textfield
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
self.activeTextField = textField;
}
// Set activeTextField to nil
- (void)textFieldDidEndEditing:(UITextField *)textField
{
self.activeTextField = nil;
}
// Dismiss the keyboard
- (IBAction)dismissKeyboard:(id)sender
{
[self.activeTextField resignFirstResponder];
}
So which code is crashing my app?
Edited :
AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
tabBarController = [[UITabBarController alloc] init];
//Adding Search,Nearby,Map,AboutUs,Favorites Tabs to tabBarController
HomeViewController * homeViewController = [[HomeViewController alloc] init];
UINavigationController *homeNav = [[UINavigationController alloc] initWithRootViewController:homeViewController];
ContactUsFormViewController *contactUsFormViewController = [[ContactUsFormViewController alloc] init];
UINavigationController *contactNav = [[UINavigationController alloc] initWithRootViewController:contactUsFormViewController];
BookingFormViewController *bookingFormViewController = [[BookingFormViewController alloc] init];
UINavigationController *bookingNav = [[UINavigationController alloc] initWithRootViewController:bookingFormViewController];
NSArray* controllers = [NSArray arrayWithObjects:homeNav,contactNav,bookingNav, nil];
tabBarController.viewControllers = controllers;
[self.window setRootViewController:tabBarController];
sleep(2);
[self.window makeKeyAndVisible];
return YES;
}
Thanks.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
-(void)viewWillAppear:(BOOL)animated
{
[self.navigationController.navigationBar setTintColor:[UIColor blackColor]];
scrollView.contentSize = CGSizeMake(320, 500);
scrollView.scrollEnabled = YES;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:nil];
scrollView.contentSize = CGSizeMake(320, 500);
[super viewWillAppear:YES];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(#"Contact Us", #"Contact Us");
self.tabBarItem.image = [UIImage imageNamed:#"contactTab.png"];
}
return self;
}

How to Drag an Image with Gesture Recognition Xcode

I have made a little test to drag views in a UIScrollView to UIView where I can call any action.
I'm trying to be able to make the image I made in the UIScrollView Draggable. I have not been able to make this work.
I was able to create test views which are not images that are able to drag.
TestViewController.h
#import "JDDroppableView.h"
#interface TestViewController : UIViewController <JDDroppableViewDelegate>
{
UIScrollView* mScrollView;
UIView* mDropTarget;
UIImageView *images;
UIImageView *image;
CGPoint mLastPosition;
}
- (void) relayout;
- (void) addView: (id) sender;
- (void) scrollToBottomAnimated: (BOOL) animated;
#property (nonatomic, retain) IBOutlet UIImageView *images;
#property (nonatomic, retain) IBOutlet UIImageView *image;
#end
TestViewController.m
#import "TestViewController.h"
#import "JDDroppableView.h"
#import <QuartzCore/QuartzCore.h>
// setup view vars
static NSInteger sDROPVIEW_MARGIN = 3;
static CGFloat sCOUNT_OF_VIEWS_HORICONTALLY = 1.0;
static CGFloat sCOUNT_OF_VIEWS_VERTICALLY = 1.0;
#implementation TestViewController
#synthesize images;
#synthesize image;
- (void)loadView
{
[super loadView];
self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor];
// increase viewcount on ipad
if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
sCOUNT_OF_VIEWS_HORICONTALLY = 0;
sCOUNT_OF_VIEWS_VERTICALLY = 0;
}
// add button
UIButton* button = [UIButton buttonWithType: UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:#"002.jpg"] forState:UIControlStateNormal];
button.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
[button setTitle: #"+" forState: UIControlStateNormal];
[button addTarget: self action: #selector(addView:) forControlEvents: UIControlEventTouchUpInside];
button.backgroundColor = [UIColor colorWithRed: 0.75 green: 0.2 blue: 0 alpha: 1.0];
button.layer.cornerRadius = 5.0;
button.showsTouchWhenHighlighted = YES;
button.adjustsImageWhenHighlighted = YES;
button.frame = CGRectMake(20,
self.view.frame.size.height - 52,
self.view.frame.size.width - 40, // width
32); // height
[self.view addSubview: button];
// drop target
mDropTarget = [[UIView alloc] init];
mDropTarget.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
mDropTarget.backgroundColor = [UIColor orangeColor];
mDropTarget.frame = CGRectMake(0, 0, 30, 30);
mDropTarget.center = CGPointMake(self.view.frame.size.width/2, button.frame.origin.y - 50);
mDropTarget.layer.cornerRadius = 15;
[self.view addSubview: mDropTarget];
[mDropTarget release];
// scrollview
mScrollView = [[UIScrollView alloc] init];
mScrollView.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
mScrollView.backgroundColor = [UIColor colorWithRed: 0.75 green: 0.2 blue: 0 alpha: 1.0];
mScrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
mScrollView.scrollIndicatorInsets = UIEdgeInsetsMake(5, 5, 5, 5);
mScrollView.contentInset = UIEdgeInsetsMake(6, 6, 6, 6);
mScrollView.layer.cornerRadius = 5.0;
mScrollView.frame = CGRectMake(20,20, self.view.frame.size.width - 40, mDropTarget.center.y - 70);
mScrollView.userInteractionEnabled = NO;
mScrollView.canCancelContentTouches = NO;
[self.view addSubview: mScrollView];
[mScrollView release];
// animate some draggable views in
int numberOfViews = sCOUNT_OF_VIEWS_HORICONTALLY*floor(sCOUNT_OF_VIEWS_VERTICALLY) + 2;
CGFloat animationTimePerView = 0.15;
for (int i = 0; i < numberOfViews; i++) {
[self performSelector: #selector(addView:) withObject: nil afterDelay: i*animationTimePerView];
if (i%(int)sCOUNT_OF_VIEWS_HORICONTALLY==0) {
[self performSelector: #selector(scrollToBottomAnimated:) withObject: [NSNumber numberWithBool: YES] afterDelay: i*animationTimePerView];
}
}
CGRect myImageRect = CGRectMake(0, 0, 320, 100);
image = [[UIImageView alloc] initWithFrame:myImageRect];
[image setImage:[UIImage imageNamed:#"002.jpg"]];
[image setUserInteractionEnabled:YES];
[self.view addSubview:image];
[mScrollView addSubview:image];
// reenable userinteraction after animation ended
[mScrollView performSelector: #selector(setUserInteractionEnabled:) withObject: [NSNumber numberWithBool: YES] afterDelay: numberOfViews*animationTimePerView];
}
#pragma layout
- (void) relayout
{
// cancel all animations
[mScrollView.layer removeAllAnimations];
for (UIView* subview in mScrollView.subviews)
[subview.layer removeAllAnimations];
// setup new animation
[UIView beginAnimations: #"drag" context: nil];
// init calculation vars
float posx = 0;
float posy = 0;
CGRect frame = CGRectZero;
mLastPosition = CGPointMake(0, -100);
CGFloat contentWidth = mScrollView.contentSize.width - mScrollView.contentInset.left - mScrollView.contentInset.right;
// iterate through all subviews
for (UIView* subview in mScrollView.subviews)
{
// ignore scroll indicators
if (!subview.userInteractionEnabled) {
continue;
}
// create new position
frame = subview.frame;
frame.origin.x = posx;
frame.origin.y = posy;
// update frame (if it did change)
if (frame.origin.x != subview.frame.origin.x ||
frame.origin.y != subview.frame.origin.y) {
subview.frame = frame;
}
// save last position
mLastPosition = CGPointMake(posx, posy);
// add size and margin
posx += frame.size.width + sDROPVIEW_MARGIN;
// goto next row if needed
if (posx > mScrollView.frame.size.width - mScrollView.contentInset.left - mScrollView.contentInset.right)
{
posx = 0;
posy += frame.size.height + sDROPVIEW_MARGIN;
}
}
// fix last posy for correct contentSize
if (posx != 0) {
posy += frame.size.height;
} else {
posy -= sDROPVIEW_MARGIN;
}
// update content size
mScrollView.contentSize = CGSizeMake(contentWidth, posy);
[UIView commitAnimations];
}
- (void) addView: (id) sender
{
CGFloat contentWidth = mScrollView.frame.size.width - mScrollView.contentInset.left - mScrollView.contentInset.right;
CGFloat contentHeight = mScrollView.frame.size.height - mScrollView.contentInset.top;
CGSize size = CGSizeMake(((contentWidth-sDROPVIEW_MARGIN*(sCOUNT_OF_VIEWS_HORICONTALLY-1))/sCOUNT_OF_VIEWS_HORICONTALLY),
floor((contentHeight-sDROPVIEW_MARGIN*(sCOUNT_OF_VIEWS_VERTICALLY-1))/sCOUNT_OF_VIEWS_VERTICALLY));
JDDroppableView * dropview = [[JDDroppableView alloc] initWithDropTarget: mDropTarget];
dropview.backgroundColor = [UIColor blackColor];
dropview.layer.cornerRadius = 3.0;
dropview.frame = CGRectMake(mLastPosition.x, mLastPosition.y, size.width, size.height);
dropview.delegate = self;
[mScrollView addSubview: dropview];
[dropview release];
[self relayout];
// scroll to bottom, if added manually
if ([sender isKindOfClass: [UIButton class]]) {
[self scrollToBottomAnimated: YES];
}
}
- (void) scrollToBottomAnimated: (BOOL) animated
{
[mScrollView.layer removeAllAnimations];
CGFloat bottomScrollPosition = mScrollView.contentSize.height;
bottomScrollPosition -= mScrollView.frame.size.height;
bottomScrollPosition += mScrollView.contentInset.top;
bottomScrollPosition = MAX(-mScrollView.contentInset.top,bottomScrollPosition);
CGPoint newOffset = CGPointMake(-mScrollView.contentInset.left, bottomScrollPosition);
if (newOffset.y != mScrollView.contentOffset.y) {
[mScrollView setContentOffset: newOffset animated: animated];
}
}
#pragma -
#pragma droppabe view delegate
- (BOOL) shouldAnimateDroppableViewBack: (JDDroppableView *)view wasDroppedOnTarget: (UIView *)target
{
[self droppableView: view leftTarget: target];
CGRect frame = view.frame;
frame.size.width *= 0.3;
frame.size.height *= 0.3;
frame.origin.x += (view.frame.size.width-frame.size.width)/2;
frame.origin.y += (view.frame.size.height-frame.size.height)/2;
[UIView beginAnimations: #"drag" context: nil];
[UIView setAnimationDelegate: view];
[UIView setAnimationDidStopSelector: #selector(removeFromSuperview)];
view.frame = frame;
view.center = target.center;
[UIView commitAnimations];
[self relayout];
[mScrollView flashScrollIndicators];
return NO;
}
- (void) droppableViewBeganDragging:(JDDroppableView *)view
{
[UIView beginAnimations: #"drag" context: nil];
view.backgroundColor = [UIColor colorWithRed: 1 green: 0.5 blue: 0 alpha: 1];
view.alpha = 0.8;
[UIView commitAnimations];
}
- (void) droppableView:(JDDroppableView *)view enteredTarget:(UIView *)target
{
target.transform = CGAffineTransformMakeScale(1.5, 1.5);
target.backgroundColor = [UIColor greenColor];
// UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"image Collided"
// message:#"FuckYea"
// delegate:nil
// cancelButtonTitle:#"Reset!"
// otherButtonTitles:nil];
//[alert show];
CGRect myImageRect = CGRectMake(0, 0, 320, 100);
images = [[UIImageView alloc] initWithFrame:myImageRect];
[images setImage:[UIImage imageNamed:#"002.jpg"]];
[self.view addSubview:images];
}
- (void) droppableView:(JDDroppableView *)view leftTarget:(UIView *)target
{
target.transform = CGAffineTransformMakeScale(1.0, 1.0);
target.backgroundColor = [UIColor orangeColor];
}
- (void) droppableViewEndedDragging:(JDDroppableView *)view
{
[UIView beginAnimations: #"drag" context: nil];
view.backgroundColor = [UIColor blackColor];
view.alpha = 1.0;
[UIView commitAnimations];
}
#end
JDDroppableView.h
#class JDDroppableView;
#protocol JDDroppableViewDelegate <NSObject>
#optional
- (void) droppableViewBeganDragging: (JDDroppableView*) view;
- (void) droppableViewDidMove: (JDDroppableView*) view;
- (void) droppableView: (JDDroppableView*) view enteredTarget: (UIView*) target;
- (void) droppableView: (JDDroppableView*) view leftTarget: (UIView*) target;
- (BOOL) shouldAnimateDroppableViewBack: (JDDroppableView*) view wasDroppedOnTarget: (UIView*) target;
- (void) droppableViewEndedDragging: (JDDroppableView*) view;
#end
#interface JDDroppableView : UIView
{
UIView * mDropTarget;
UIView * mOuterView;
UIScrollView * mScrollView;
BOOL mIsDragging;
BOOL mIsOverTarget;
CGPoint mOriginalPosition;
}
#property (nonatomic, assign) id<JDDroppableViewDelegate> delegate;
- (id) initWithFrame:(CGRect)frame;
- (id) initWithDropTarget:(UIView*)target;
#end
JDDroppableView.m
#import "JDDroppableView.h"
#interface JDDroppableView (hidden)
- (void) beginDrag;
- (void) dragAtPosition: (UITouch *) touch;
- (void) endDrag;
- (void) changeSuperView;
- (BOOL) handleDroppedView;
#end
#implementation JDDroppableView
#synthesize delegate = _delegate;
- (id)init
{
return [self initWithFrame: [UIApplication sharedApplication].keyWindow.frame];
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
mIsDragging = NO;
mIsOverTarget = NO;
}
return self;
}
- (id) initWithDropTarget: (UIView *) target;
{
self = [self init];
if (self != nil) {
mDropTarget = target;
}
return self;
}
#pragma mark touch handling
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self beginDrag];
[self dragAtPosition: [touches anyObject]];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
[self dragAtPosition: [touches anyObject]];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
[self endDrag];
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
[self endDrag];
}
#pragma mark dragging logic
- (void) beginDrag
{
mIsDragging = YES;
if ([_delegate respondsToSelector: #selector(droppableViewBeganDragging:)]) {
[_delegate droppableViewBeganDragging: self];
};
mOriginalPosition = self.center;
[self changeSuperView];
}
- (void) dragAtPosition: (UITouch *) touch
{
[UIView beginAnimations: #"drag" context: nil];
self.center = [touch locationInView: self.superview];
[UIView commitAnimations];
if ([_delegate respondsToSelector: #selector(droppableViewDidMove:)]) {
[_delegate droppableViewDidMove:self];
}
if (mDropTarget) {
CGRect intersect = CGRectIntersection(self.frame, mDropTarget.frame);
if (intersect.size.width > 10 || intersect.size.height > 10)
{
if (!mIsOverTarget)
{
mIsOverTarget = YES;
if ([_delegate respondsToSelector: #selector(droppableView:enteredTarget:)]) {
[_delegate droppableView: self enteredTarget: mDropTarget];
}
}
}
else if (mIsOverTarget)
{
mIsOverTarget = NO;
if ([_delegate respondsToSelector: #selector(droppableView:leftTarget:)]) {
[_delegate droppableView: self leftTarget: mDropTarget];
}
}
}
}
- (void) endDrag
{
mIsOverTarget = NO;
if([_delegate respondsToSelector: #selector(droppableViewEndedDragging:)]) {
[_delegate droppableViewEndedDragging: self];
}
if (mDropTarget) {
CGRect intersect = CGRectIntersection(self.frame, mDropTarget.frame);
if (intersect.size.width > 10 || intersect.size.height > 10) {
if([self handleDroppedView]) {
mIsDragging = NO;
return;
}
}
}
[self changeSuperView];
mIsDragging = NO; // this needs to be after superview change
[UIView beginAnimations: #"drag" context: nil];
self.center = mOriginalPosition;
[UIView commitAnimations];
}
- (BOOL) handleDroppedView
{
if (mDropTarget && [_delegate respondsToSelector: #selector(shouldAnimateDroppableViewBack:wasDroppedOnTarget:)]) {
return ![_delegate shouldAnimateDroppableViewBack: self wasDroppedOnTarget: mDropTarget];
}
return NO;
}
#pragma mark superview handling
- (void)willMoveToSuperview:(id)newSuperview
{
if (!mIsDragging && [newSuperview isKindOfClass: [UIScrollView class]]) {
mScrollView = newSuperview;
mOuterView = mScrollView.superview;
}
}
- (void) changeSuperView
{
if (!mScrollView) {
[self.superview bringSubviewToFront: self];
return;
}
UIView * tmp = self.superview;
[self removeFromSuperview];
[mOuterView addSubview: self];
mOuterView = tmp;
// set new position
CGPoint ctr = self.center;
if (mOuterView == mScrollView) {
ctr.x += mScrollView.frame.origin.x - mScrollView.contentOffset.x;
ctr.y += mScrollView.frame.origin.y - mScrollView.contentOffset.y;
} else {
ctr.x -= mScrollView.frame.origin.x - mScrollView.contentOffset.x;
ctr.y -= mScrollView.frame.origin.y - mScrollView.contentOffset.y;
}
self.center = ctr;
}
#end
AppDelegate.h
#interface AppDelegate : UIResponder <UIApplicationDelegate>
{
UIWindow* mWindow;
TestViewController* mViewController;
}
#end
AppDelegate.m
#import "AppDelegate.h"
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
mWindow = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
mWindow.backgroundColor = [UIColor whiteColor];
TestViewController* viewController = [[TestViewController alloc] init];
[mWindow addSubview: viewController.view];
[mWindow makeKeyAndVisible];
return YES;
}
- (void)dealloc
{
[mWindow release];
[mViewController release];
[super dealloc];
}
#end
Any help is much appreciated.
Thank you.
According to Apple's documentation
New image view objects are configured to disregard user events by
default. If you want to handle events in a custom subclass of
UIImageView, you must explicitly change the value of the
userInteractionEnabled property to YES after initializing the object.
You need to set userInteractionEnabled to YES on your UIImageView like this:
[image setUserInteractionEnabled:YES];
Hope this help.
You posted the complete example code of https://github.com/jaydee3/JDDroppableView/.
Perhaps you just ask a single question and refer to the project. But to use it for UIImageViews, you need to alloc init a JDDroppableView and put your imageView on it.
UIImageView *imageView = [[UIImageView alloc] initWithImage:...];
imageView.autoresizingMask = UIAutoresizingFlexibleWidth | UIAutoresizingFlexibleHeight;
JDDroppableView *droppableView = [[JDDroppableView alloc] initWithFrame:imageView.bounds];
[droppableView addSubview:imageView];

iphone FullScreen navigation bar displacement

I implemented an app Images in full screen are displayed fine.
After few seconds the navigation bar and status bar are hidden, now if i close the app and again open it, the navigation bar is displaced at the top of the screen where status bar overlaps on navigation bar
I guess i have to change something about the CGRect frame
Please help me
#import "KTPhotoScrollViewController.h"
#import "KTPhotoBrowserDataSource.h"
#import "KTPhotoBrowserGlobal.h"
#import "KTPhotoView.h"
const CGFloat ktkDefaultPortraitToolbarHeight = 44;
const CGFloat ktkDefaultLandscapeToolbarHeight = 33;
const CGFloat ktkDefaultToolbarHeight = 44;
#define BUTTON_DELETEPHOTO 0
#define BUTTON_CANCEL 1
#interface KTPhotoScrollViewController (KTPrivate)
- (void)setCurrentIndex:(NSInteger)newIndex;
- (void)toggleChrome:(BOOL)hide;
- (void)startChromeDisplayTimer;
- (void)cancelChromeDisplayTimer;
- (void)hideChrome;
- (void)showChrome;
- (void)swapCurrentAndNextPhotos;
- (void)nextPhoto;
- (void)previousPhoto;
- (void)toggleNavButtons;
- (CGRect)frameForPagingScrollView;
- (CGRect)frameForPageAtIndex:(NSUInteger)index;
- (void)loadPhoto:(NSInteger)index;
- (void)unloadPhoto:(NSInteger)index;
- (void)trashPhoto;
- (void)exportPhoto;
#end
#implementation KTPhotoScrollViewController
#synthesize statusBarStyle = statusBarStyle_;
#synthesize statusbarHidden = statusbarHidden_;
#synthesize my_img, imgURL;
- (void)dealloc
{
[nextButton_ release], nextButton_ = nil;
[previousButton_ release], previousButton_ = nil;
[scrollView_ release], scrollView_ = nil;
[toolbar_ release], toolbar_ = nil;
[photoViews_ release], photoViews_ = nil;
[dataSource_ release], dataSource_ = nil;
[super dealloc];
}
- (id)initWithDataSource:(id <KTPhotoBrowserDataSource>)dataSource andStartWithPhotoAtIndex:(NSUInteger)index
{
if (self = [super init]) {
startWithIndex_ = index;
dataSource_ = [dataSource retain];
// Make sure to set wantsFullScreenLayout or the photo
// will not display behind the status bar.
[self setWantsFullScreenLayout:YES];
BOOL isStatusbarHidden = [[UIApplication sharedApplication] isStatusBarHidden];
[self setStatusbarHidden:isStatusbarHidden];
self.hidesBottomBarWhenPushed = YES;
}
return self;
}
- (void)loadView
{
[super loadView];
CGRect scrollFrame = [self frameForPagingScrollView];
UIScrollView *newView = [[UIScrollView alloc] initWithFrame:scrollFrame];
[newView setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
[newView setDelegate:self];
UIColor *backgroundColor = [dataSource_ respondsToSelector:#selector(imageBackgroundColor)] ?
[dataSource_ imageBackgroundColor] : [UIColor blackColor];
[newView setBackgroundColor:backgroundColor];
[newView setAutoresizesSubviews:YES];
[newView setPagingEnabled:YES];
[newView setShowsVerticalScrollIndicator:NO];
[newView setShowsHorizontalScrollIndicator:NO];
[[self view] addSubview:newView];
scrollView_ = [newView retain];
[newView release];
nextButton_ = [[UIBarButtonItem alloc]
initWithImage:[UIImage imageNamed:#"nextIcon.png"]
style:UIBarButtonItemStylePlain
target:self
action:#selector(nextPhoto)];
previousButton_ = [[UIBarButtonItem alloc]
initWithImage:[UIImage imageNamed:#"previousIcon.png"]
style:UIBarButtonItemStylePlain
target:self
action:#selector(previousPhoto)];
UIBarButtonItem *msgButton = nil;
UIBarButtonItem *exportButton = nil;
exportButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction
target:self
action:#selector(exportPhoto)];
msgButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks
target:self
action:#selector(msgPhoto)];
// UIImage *image = [UIImage imageNamed:#"Icon-Small"];
// UIButton *myMuteButton = [UIButton buttonWithType:UIButtonTypeCustom];
// myMuteButton.bounds = CGRectMake( 0, 0, image.size.width, image.size.height );
// [myMuteButton setImage:image forState:UIControlStateNormal];
// [myMuteButton addTarget:self action:#selector(trashPhoto) forControlEvents:UIControlEventTouchUpInside];
// UIBarButtonItem *myMuteBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:myMuteButton];
UIBarItem *space = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
NSMutableArray *toolbarItems = [[NSMutableArray alloc] initWithCapacity:7];
if (exportButton) [toolbarItems addObject:exportButton];
[toolbarItems addObject:space];
[toolbarItems addObject:previousButton_];
[toolbarItems addObject:space];
[toolbarItems addObject:nextButton_];
[toolbarItems addObject:space];
if (msgButton) [toolbarItems addObject:msgButton];
// [toolbarItems addObject:myMuteBarButtonItem];
// [myMuteBarButtonItem release];
CGRect screenFrame = [[UIScreen mainScreen] bounds];
CGRect toolbarFrame = CGRectMake(0,
screenFrame.size.height - ktkDefaultToolbarHeight,
screenFrame.size.width,
ktkDefaultToolbarHeight);
toolbar_ = [[UIToolbar alloc] initWithFrame:toolbarFrame];
[toolbar_ setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleRightMargin];
[toolbar_ setBarStyle:UIBarStyleBlackTranslucent];
[toolbar_ setItems:toolbarItems];
[[self view] addSubview:toolbar_];
if (msgButton) [msgButton release];
if (exportButton) [exportButton release];
[toolbarItems release];
[space release];
}
- (void) ShowAlert:(NSString*)title MyMsg:(NSString*)msg{
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:title message:msg delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[alert show];
[alert autorelease];
}
- (void)setTitleWithCurrentPhotoIndex
{
NSString *formatString = NSLocalizedString(#"%1$i of %2$i", #"Picture X out of Y total.");
NSString *title = [NSString stringWithFormat:formatString, currentIndex_ + 1, photoCount_, nil];
[self setTitle:title];
}
- (void)scrollToIndex:(NSInteger)index
{
CGRect frame = scrollView_.frame;
frame.origin.x = frame.size.width * index;
frame.origin.y = 0;
[scrollView_ scrollRectToVisible:frame animated:NO];
}
- (void)setScrollViewContentSize
{
NSInteger pageCount = photoCount_;
if (pageCount == 0) {
pageCount = 1;
}
CGSize size = CGSizeMake(scrollView_.frame.size.width * pageCount,
scrollView_.frame.size.height / 2); // Cut in half to prevent horizontal scrolling.
[scrollView_ setContentSize:size];
}
- (void)viewDidLoad
{
[super viewDidLoad];
photoCount_ = [dataSource_ numberOfPhotos];
[self setScrollViewContentSize];
// Setup our photo view cache. We only keep 3 views in
// memory. NSNull is used as a placeholder for the other
// elements in the view cache array.
photoViews_ = [[NSMutableArray alloc] initWithCapacity:photoCount_];
for (int i=0; i < photoCount_; i++) {
[photoViews_ addObject:[NSNull null]];
}
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// The first time the view appears, store away the previous controller's values so we can reset on pop.
UINavigationBar *navbar = [[self navigationController] navigationBar];
if (!viewDidAppearOnce_) {
viewDidAppearOnce_ = YES;
navbarWasTranslucent_ = [navbar isTranslucent];
statusBarStyle_ = [[UIApplication sharedApplication] statusBarStyle];
}
// Then ensure translucency. Without it, the view will appear below rather than under it.
[navbar setTranslucent:YES];
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent animated:YES];
// Set the scroll view's content size, auto-scroll to the stating photo,
// and setup the other display elements.
[self setScrollViewContentSize];
[self setCurrentIndex:startWithIndex_];
[self scrollToIndex:startWithIndex_];
[self setTitleWithCurrentPhotoIndex];
[self toggleNavButtons];
[self startChromeDisplayTimer];
}
- (void)viewWillDisappear:(BOOL)animated
{
// Reset nav bar translucency and status bar style to whatever it was before.
UINavigationBar *navbar = [[self navigationController] navigationBar];
[navbar setTranslucent:navbarWasTranslucent_];
[[UIApplication sharedApplication] setStatusBarStyle:statusBarStyle_ animated:YES];
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[self cancelChromeDisplayTimer];
[super viewDidDisappear:animated];
}
- (void)deleteCurrentPhoto
{
if (dataSource_) {
// TODO: Animate the deletion of the current photo.
NSInteger photoIndexToDelete = currentIndex_;
[self unloadPhoto:photoIndexToDelete];
[dataSource_ deleteImageAtIndex:photoIndexToDelete];
photoCount_ -= 1;
if (photoCount_ == 0) {
[self showChrome];
[[self navigationController] popViewControllerAnimated:YES];
} else {
NSInteger nextIndex = photoIndexToDelete;
if (nextIndex == photoCount_) {
nextIndex -= 1;
}
[self setCurrentIndex:nextIndex];
[self setScrollViewContentSize];
}
}
}
- (void)toggleNavButtons
{
[previousButton_ setEnabled:(currentIndex_ > 0)];
[nextButton_ setEnabled:(currentIndex_ < photoCount_ - 1)];
}
#pragma mark -
#pragma mark Frame calculations
#define PADDING 20
- (CGRect)frameForPagingScrollView
{
CGRect frame = [[UIScreen mainScreen] bounds];
frame.origin.x -= PADDING;
frame.size.width += (2 * PADDING);
return frame;
}
- (CGRect)frameForPageAtIndex:(NSUInteger)index
{
CGRect bounds = [scrollView_ bounds];
CGRect pageFrame = bounds;
pageFrame.size.width -= (2 * PADDING);
pageFrame.origin.x = (bounds.size.width * index) + PADDING;
return pageFrame;
}
#pragma mark -
#pragma mark Photo (Page) Management
- (void)loadPhoto:(NSInteger)index
{
if (index < 0 || index >= photoCount_) {
return;
}
id currentPhotoView = [photoViews_ objectAtIndex:index];
if (NO == [currentPhotoView isKindOfClass:[KTPhotoView class]]) {
// Load the photo view.
CGRect frame = [self frameForPageAtIndex:index];
KTPhotoView *photoView = [[KTPhotoView alloc] initWithFrame:frame];
[photoView setScroller:self];
[photoView setIndex:index];
[photoView setBackgroundColor:[UIColor clearColor]];
// Set the photo image.
if (dataSource_) {
if ([dataSource_ respondsToSelector:#selector(imageAtIndex:photoView:)] == NO) {
UIImage *image = [dataSource_ imageAtIndex:index];
[photoView setImage:image];
} else {
[dataSource_ imageAtIndex:index photoView:photoView];
}
}
[scrollView_ addSubview:photoView];
[photoViews_ replaceObjectAtIndex:index withObject:photoView];
[photoView release];
} else {
// Turn off zooming.
[currentPhotoView turnOffZoom];
}
}
- (void)unloadPhoto:(NSInteger)index
{
if (index < 0 || index >= photoCount_) {
return;
}
id currentPhotoView = [photoViews_ objectAtIndex:index];
if ([currentPhotoView isKindOfClass:[KTPhotoView class]]) {
[currentPhotoView removeFromSuperview];
[photoViews_ replaceObjectAtIndex:index withObject:[NSNull null]];
}
}
- (void)setCurrentIndex:(NSInteger)newIndex
{
currentIndex_ = newIndex;
if(newIndex>=0){
myUrl = [dataSource_ imageURLAtIndex:currentIndex_ photoView:[photoViews_ objectAtIndex:currentIndex_]];
myDescr = [dataSource_ imageDESCRAtIndex:currentIndex_ photoView:[photoViews_ objectAtIndex:currentIndex_]];
img_Title =[dataSource_ imageimg_TitleAtIndex:currentIndex_ photoView:[photoViews_ objectAtIndex:currentIndex_]];
}
[self loadPhoto:currentIndex_];
[self loadPhoto:currentIndex_ + 1];
[self loadPhoto:currentIndex_ - 1];
[self unloadPhoto:currentIndex_ + 2];
[self unloadPhoto:currentIndex_ - 2];
[self setTitleWithCurrentPhotoIndex];
[self toggleNavButtons];
}
#pragma mark -
#pragma mark Rotation Magic
- (void)updateToolbarWithOrientation:(UIInterfaceOrientation)interfaceOrientation
{
CGRect toolbarFrame = toolbar_.frame;
if ((interfaceOrientation) == UIInterfaceOrientationPortrait || (interfaceOrientation) == UIInterfaceOrientationPortraitUpsideDown) {
toolbarFrame.size.height = ktkDefaultPortraitToolbarHeight;
} else {
toolbarFrame.size.height = ktkDefaultLandscapeToolbarHeight+1;
}
toolbarFrame.size.width = self.view.frame.size.width;
toolbarFrame.origin.y = self.view.frame.size.height - toolbarFrame.size.height;
toolbar_.frame = toolbarFrame;
}
- (void)layoutScrollViewSubviews
{
[self setScrollViewContentSize];
NSArray *subviews = [scrollView_ subviews];
for (KTPhotoView *photoView in subviews) {
CGPoint restorePoint = [photoView pointToCenterAfterRotation];
CGFloat restoreScale = [photoView scaleToRestoreAfterRotation];
[photoView setFrame:[self frameForPageAtIndex:[photoView index]]];
[photoView setMaxMinZoomScalesForCurrentBounds];
[photoView restoreCenterPoint:restorePoint scale:restoreScale];
}
// adjust contentOffset to preserve page location based on values collected prior to location
CGFloat pageWidth = scrollView_.bounds.size.width;
CGFloat newOffset = (firstVisiblePageIndexBeforeRotation_ * pageWidth) + (percentScrolledIntoFirstVisiblePage_ * pageWidth);
scrollView_.contentOffset = CGPointMake(newOffset, 0);
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
duration:(NSTimeInterval)duration
{
// here, our pagingScrollView bounds have not yet been updated for the new interface orientation. So this is a good
// place to calculate the content offset that we will need in the new orientation
CGFloat offset = scrollView_.contentOffset.x;
CGFloat pageWidth = scrollView_.bounds.size.width;
if (offset >= 0) {
firstVisiblePageIndexBeforeRotation_ = floorf(offset / pageWidth);
percentScrolledIntoFirstVisiblePage_ = (offset - (firstVisiblePageIndexBeforeRotation_ * pageWidth)) / pageWidth;
} else {
firstVisiblePageIndexBeforeRotation_ = 0;
percentScrolledIntoFirstVisiblePage_ = offset / pageWidth;
}
}
- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
duration:(NSTimeInterval)duration
{
[self layoutScrollViewSubviews];
// Rotate the toolbar.
[self updateToolbarWithOrientation:toInterfaceOrientation];
// Adjust navigation bar if needed.
if (isChromeHidden_ && statusbarHidden_ == NO) {
UINavigationBar *navbar = [[self navigationController] navigationBar];
CGRect frame = [navbar frame];
frame.origin.y = 20;
[navbar setFrame:frame];
}
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
[self startChromeDisplayTimer];
}
- (UIView *)rotatingFooterView
{
return toolbar_;
}
#pragma mark -
#pragma mark Chrome Helpers
- (void)toggleChromeDisplay
{
[self toggleChrome:!isChromeHidden_];
}
- (void)toggleChrome:(BOOL)hide
{
isChromeHidden_ = hide;
if (hide) {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.4];
}
if ( ! [self isStatusbarHidden] ) {
if ([[UIApplication sharedApplication] respondsToSelector:#selector(setStatusBarHidden:withAnimation:)]) {
[[UIApplication sharedApplication] setStatusBarHidden:hide withAnimation:NO];
} else { // Deprecated in iOS 3.2+.
id sharedApp = [UIApplication sharedApplication]; // Get around deprecation warnings.
[sharedApp setStatusBarHidden:hide animated:NO];
}
}
CGFloat alpha = hide ? 0.0 : 1.0;
// Must set the navigation bar's alpha, otherwise the photo
// view will be pushed until the navigation bar.
UINavigationBar *navbar = [[self navigationController] navigationBar];
[navbar setAlpha:alpha];
[toolbar_ setAlpha:alpha];
if (hide) {
[UIView commitAnimations];
}
if ( ! isChromeHidden_ ) {
[self startChromeDisplayTimer];
}
}
- (void)hideChrome
{
if (chromeHideTimer_ && [chromeHideTimer_ isValid]) {
[chromeHideTimer_ invalidate];
chromeHideTimer_ = nil;
}
[self toggleChrome:YES];
}
- (void)showChrome
{
[self toggleChrome:NO];
}
- (void)startChromeDisplayTimer
{
[self cancelChromeDisplayTimer];
chromeHideTimer_ = [NSTimer scheduledTimerWithTimeInterval:5.0
target:self
selector:#selector(hideChrome)
userInfo:nil
repeats:NO];
}
- (void)cancelChromeDisplayTimer
{
if (chromeHideTimer_) {
[chromeHideTimer_ invalidate];
chromeHideTimer_ = nil;
}
}
#pragma mark -
#pragma mark UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGFloat pageWidth = scrollView.frame.size.width;
float fractionalPage = scrollView.contentOffset.x / pageWidth;
NSInteger page = floor(fractionalPage);
if (page != currentIndex_) {
[self setCurrentIndex:page];
}
}
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
[self hideChrome];
}
#pragma mark -
#pragma mark Toolbar Actions
- (void)nextPhoto
{
[self scrollToIndex:currentIndex_ + 1];
[self startChromeDisplayTimer];
}
- (void)previousPhoto
{
[self scrollToIndex:currentIndex_ - 1];
[self startChromeDisplayTimer];
}
- (void)msgPhoto
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:img_Title message:myDescr delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
- (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
NSString *message;
NSString *title;
if (!error) {
title = #"Done";
message = #"image copied to your local gallery";
} else {
title = #"Error";
message = [error description];
}
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:message delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0) {
//save to gallery
UIImage *imageB = [UIImage imageWithData: [NSData dataWithContentsOfURL: [NSURL URLWithString: myUrl]]];
UIImageWriteToSavedPhotosAlbum(imageB, self, #selector(imageSavedToPhotosAlbum: didFinishSavingWithError: contextInfo:), nil);
} else if (buttonIndex == 1) {
//email
MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc] init];
mailComposer.mailComposeDelegate = self;
mailComposer.toolbar.barStyle = UIBarStyleBlack;
mailComposer.title = #"Your title here";
[[mailComposer navigationBar] setTintColor:[UIColor colorWithRed:124.0/255 green:17.0/255 blue:92.0/255 alpha:1]];
if ([MFMailComposeViewController canSendMail]) {
[mailComposer setSubject:#"Look at a great image"];
[mailComposer setMessageBody:[NSString stringWithFormat:#"%#",myUrl] isHTML:NO];
UIImage *imageB = [UIImage imageWithData: [NSData dataWithContentsOfURL: [NSURL URLWithString: myUrl]]];
NSData *exportData = UIImageJPEGRepresentation(imageB ,1.0);
[mailComposer addAttachmentData:exportData mimeType:#"image/jpeg" fileName:img_Title];
[self presentModalViewController:mailComposer animated:YES];
}
//release the mailComposer as it is now being managed as the UIViewControllers modalViewController.
[mailComposer release];
} else if (buttonIndex == 2) {
//cancel
}
[self startChromeDisplayTimer];
}
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
[self dismissModalViewControllerAnimated:YES];
if (result == MFMailComposeResultFailed) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Error" message:#"Failed to send message" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
- (void) exportPhoto
{
if ([dataSource_ respondsToSelector:#selector(exportImageAtIndex:)])
[dataSource_ exportImageAtIndex:currentIndex_];
[self startChromeDisplayTimer];
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:#"Actions"
delegate:self
cancelButtonTitle:#"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:#"Save to gallery", #"Email",nil];
[actionSheet showInView:[self view]];
[actionSheet release];
}
#end
First of all, tel me if you want to show Status Bar or not.
If you dont want to show then, in nib of controller's, you can select its view, and under its properties set StatusBar to NONE, thar time it wont show status bar... and you can set vew size to (320*480) or else with status bar it will be (320*460) and 20 pixels will be reserved for status bar.
Other ways to do (without using above method)
Can hide StatusBar from info.plist also, by setting property UIStatusBarHidden property to YES. (To hide the status bar when the app launches)
Programmatically can be done, add line to appDelegate's applicationDidFinishLaunching method,
[[UIApplication sharedApplication] setStatusBarHidden:YES animated:NO];

Adding multiple navigation controllers inside a view controller?

I'm trying to acheive a dual-tabBar app for the iPhone and using the following code for a base class view controller to add several navigation controllers inside the view controller (see code below). But the problem is: No subviews are added to self.view, despite them being initialized earlier. Any ideas?
- (IBAction)ViewButtonPressed:(id)sender
{
UIButton *b = (UIButton *)sender;
int index = b.tag - 1000;
[self SelectNavigationController:index];
}
- (void)SelectNavigationController:(int)index
{
// Set index to top-most view ->
UINavigationController *nc = (UINavigationController *)[navigationControllers objectAtIndex:index];
[self.view bringSubviewToFront:nc.view];
}
#pragma mark -
#pragma mark display
- (void)Display
{
CGRect frame = CGRectMake(0, 44, 320, 367);
// Create buttons above frame and show navigation controller inside frame ->
UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.origin.y)];
for (int i=0; i<[navigationControllers count]; ++i)
{
UINavigationController *nc = (UINavigationController *)[navigationControllers objectAtIndex:i];
UIViewController *vc = [nc.viewControllers objectAtIndex:0];
NSString *titel = vc.navigationItem.title;
UIButton *b = [UIButton buttonWithType:UIButtonTypeCustom];
[b setBackgroundColor:[UIColor lightGrayColor]]; // TODO: Replace with image <-
[b setTitle:titel forState:UIControlStateNormal];
b.tag = i + 1000;
[b setFrame:CGRectMake(i * frame.size.width / 3, 0, frame.size.width / 3, frame.origin.y - 1)];
[v addSubview:b];
}
for (int j=0; j<[navigationControllers count]; ++j)
{
UINavigationController *nc = (UINavigationController *)[navigationControllers objectAtIndex:j];
[nc.navigationBar addSubview:v];
[self.view addSubview:nc.view]; // Add view to view <-
nc.view.frame = frame;
}
[v release];
if (VIEW_DEBUG)
NSLog(#"BaseTabViewController.m: self.view.subviews: %d", [self.view.subviews count]);
}
#pragma mark -
#pragma mark addviewcontroller
- (void)AddViewControllerForNavigationController:(UIViewController *)viewController
{
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController];
navController.view.backgroundColor = [UIColor greenColor];
[navigationControllers addObject:navController];
[navController release];
}
#pragma mark -
#pragma mark init, loadView, viewDidLoad and dealloc
- (id)initWithCoder:(NSCoder *)aDecoder
{
if (self = [super initWithCoder:aDecoder])
{
navigationControllers = [[NSMutableArray alloc] init];
}
return self;
}
- (void)loadView
{
//
}
- (void)viewDidLoad
{
if (!viewDidLoadAlready)
{
[self Display];
viewDidLoadAlready = YES;
[super viewDidLoad];
}
}
And the code in the subclass:
- (id)initWithCoder:(NSCoder *)aDecoder
{
if (self = [super initWithCoder:aDecoder])
{
PistKartaViewController *pistKarta = [[PistKartaViewController alloc] init];
pistKarta.navigationItem.title = #"Pistkarta";
LiftRapportViewController *liftRapport = [[LiftRapportViewController alloc] init];
liftRapport.navigationItem.title = #"Liftrapport";
SkipassViewController *skiPass = [[SkipassViewController alloc] init];
skiPass.navigationItem.title = #"Skipass";
[self AddViewControllerForNavigationController:pistKarta];
[self AddViewControllerForNavigationController:liftRapport];
[self AddViewControllerForNavigationController:skiPass];
[pistKarta release];
[liftRapport release];
[skiPass release];
}
return self;
}
I figured it out. I had the following in a view controller I was adding...
- (void)loadView
{
}
, which of course means that the superclass won't be loaded at all. Stupid. Otherwise, this method works quite well. :)

UITextView setEditing:YES makes the control of the TextView scroll?

I have a UITableViewCell that has an integrated UITextView. The goal is to make a cell that auto-expands while editing. The issue right now is that when the UITableViewController sends setEditing:YES, the UITextView scrolls and clips some of the text at the top.
I'm sure there is a better way to do this but I just don't know how...
#import "PLTextViewCell.h"
#implementation PLTextViewCell
#synthesize delegate=_delegate;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
if ((self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) {
_textView = [[UITextView alloc] initWithFrame:CGRectMake(90, 0, 200, 80)];
[_textView setEditable:NO];
[_textView setFont:[UIFont systemFontOfSize:15.0]];
[_textView setDelegate:self];
[_textView setScrollEnabled:NO];
[[self contentView] addSubview:_textView];
}
return self;
}
- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
[super setEditing:editing animated:animated];
[_textView setEditable:editing];
[_textView scrollRangeToVisible:NSMakeRange(0, 1)];
[self textViewDidChange:_textView];
}
- (void)dealloc {
[_textView dealloc];
[super dealloc];
}
- (void)setTextValue:(NSString *)value {
[_textView setText:value];
[self textViewDidChange:_textView];
}
- (NSString *)textValue {
return [_textView text];
}
- (CGFloat)cellHeight {
CGSize mySize = [_textView contentSize];
NSLog(#"cell height: %f", mySize.height);
return mySize.height;
}
#pragma mark -
#pragma mark Text view delegate
- (void)textViewDidChange:(UITextView *)textView {
CGSize mySize = [_textView contentSize];
if (mySize.height > self.bounds.size.height) {
[textView scrollRectToVisible:CGRectMake(0,textView.contentSize.height-1,1,1) animated:NO];
if ([self delegate] != nil) {
[[self delegate] tableViewCellDidChangeHeight:self];
}
[textView setFrame:CGRectMake(90, 0, mySize.width, mySize.height)];
[self setNeedsLayout];
}
}
#end
Then the Table view implements a delegation method:
- (void)tableViewCellDidChangeHeight:(PLTextViewCell *)cell {
[self.tableView beginUpdates];
[self.tableView endUpdates];
}
Any ideas? Am I doing this all wrong?
Turns out that it was the UIEdgeInset combined with my textview not being tall enough. My mistake!