I have implemented a pie chart using the core plot framework, and I need to know how to display text inside each of the slices.
Here is the .m source code:
#implementation ViewController
#synthesize graph,pieData;
// Implement loadView to create a view hierarchy programmatically
// without using a nib.
- (void)loadView {
CPTGraphHostingView * newView = [[CPTGraphHostingView alloc]initWithFrame:
[[UIScreen mainScreen] applicationFrame]];
self.view = newView;
[newView release];
}
// Implement viewDidLoad to do additional setup after loading the view,
// typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
graph = [[CPTXYGraph alloc] initWithFrame: self.view.bounds];
CPTGraphHostingView *hostingView = (CPTGraphHostingView *)self.view;
hostingView.hostedGraph = graph;
CPTPieChart *pieChart = [[CPTPieChart alloc] init];
pieChart.dataSource = self;
pieChart.delegate = self;
pieChart.pieRadius = 100.0;
pieChart.identifier = #"PieChart1";
pieChart.startAngle = M_PI_4;
//pieChart.sliceDirection = CPTPieDirectionCounterClockwise;
pieChart.sliceDirection = CPTPieDirectionClockwise;
self.pieData= [NSMutableArray arrayWithObjects:
[NSNumber numberWithDouble:90.0],
[NSNumber numberWithDouble:20.0],
[NSNumber numberWithDouble:30.0],
[NSNumber numberWithDouble:40.0],
[NSNumber numberWithDouble:50.0],
[NSNumber numberWithDouble:60.0],
nil];
CPTTheme *theme = [CPTTheme themeNamed:kCPTDarkGradientTheme];
[graph applyTheme:theme];
[graph addPlot:pieChart];
[pieChart release];
}
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot {
return [self.pieData count];
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot
field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index {
return [self.pieData objectAtIndex:index];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
}
- (void)dealloc {
[pieData release];
[graph release];
[super dealloc];
}
- (void)pieChart:(CPTPieChart *)plot
sliceWasSelectedAtRecordIndex:(NSUInteger)index {
NSLog(#"Slices are selected: index = %d", index);
}
#end
Use the labelOffset property. A positive value will position the labels outside the plot and a negative value will position them inside.
Related
I have Seprate UIView which i am using in UIViewController it initially loads but i want that when that is loaded and I again click on the button then it should reload because it has graph creation method which draws graph when view loaded
#import <UIKit/UIKit.h>
#import "ECGraph.h"
#import "ECGraphItem.h"
#import "CereniaAppDelegate.h"
#class GraphsViewController;
#interface Display : UIView {
NSArray *percentages;
CereniaAppDelegate*appDelegate;
}
#property(nonatomic,retain)NSArray*percentages;
-(void) setPercentageArray:(NSArray*) array;
#end
Implementation files
#import "Display.h"
#import "ECGraph.h"
#import "CereniaAppDelegate.h"
#implementation Display
#synthesize percentages;
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
}
return self;
}
- (void)drawRect:(CGRect)rect {
CGContextRef _context = UIGraphicsGetCurrentContext();
ECGraph *graph = [[ECGraph alloc] initWithFrame:CGRectMake(70,-70,800,200) withContext:
_context isPortrait:NO];
appDelegate=[[UIApplication sharedApplication]delegate];
ECGraphItem *item1 = [[ECGraphItem alloc] init];
ECGraphItem *item2 = [[ECGraphItem alloc] init];
ECGraphItem *item3 = [[ECGraphItem alloc] init];
item1.isPercentage = YES;
int value=(int)roundf(appDelegate.graphValueOne);
item1.yValue=value;
item1.width = 70;
item1.name = #"Unvaccinated horse";
int value1=(int)roundf(appDelegate.graphValueTwo);
item2.isPercentage = YES;
item2.yValue=value1;
item2.width = 70;
item2.name = #"Annually Vaccinated horse";
int value3=(int)roundf(appDelegate.graphValueThree);
item3.isPercentage = YES;
item3.yValue=value3;
item3.width = 70;
item3.name = #"Semi-Annually vaccinated horse";
NSArray *items = [[NSArray alloc] initWithObjects:item1,item2,item3,nil];
[graph setXaxisTitle:#""];
[graph setYaxisTitle:#"Risk"];
[graph setDelegate:self];
[graph setBackgroundColor:[UIColor lightGrayColor]];
[graph drawHistogramWithItems:items lineWidth:2 color:[UIColor blackColor]];
}
-(void) setPercentageArray:(NSArray*) array
{
percentages = array;
NSString*test=[percentages objectAtIndex:0];
NSLog(test);
}
- (void)dealloc {
[super dealloc];
}
#end
You can get any view to redraw with
[view setNeedsDisplay];
So on your refresh button you would update the data used by the Display class and then setNeedsDisplay.
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];
I have app to create a graph i have created a view based app and then add the code for creating graph in it but it does not disply the graph. If use same code to create a separate UIView then it works other wise not
#import <UIKit/UIKit.h>
#import "ECGraph.h"
#import "ECGraphItem.h"
#class GraphsViewController;
#interface Display : UIView {
NSArray *percentages;
int myY;
ECGraph *graph;
ECGraphItem *item1;
ECGraphItem *item2;
}
#property(nonatomic,retain)NSArray*percentages;
-(void) setPercentageArray:(NSArray*) array;
#end
#import "Display.h"
#import "ECGraph.h"
#implementation Display
#synthesize percentages;
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
// Initialization code.
}
return self;
}
- (void)drawRect:(CGRect)rect {
CGContextRef _context = UIGraphicsGetCurrentContext();
graph = [[ECGraph alloc] initWithFrame:CGRectMake(500,-320,320, 200) withContext:_context isPortrait:NO];
item1 = [[ECGraphItem alloc] init];
item2 = [[ECGraphItem alloc] init];
/*
ECGraphItem *item1 = [[ECGraphItem alloc] init];
ECGraphItem *item2 = [[ECGraphItem alloc] init];*/
item1.isPercentage = YES;
item1.yValue=myY;
item1.width = 35;
item1.name = #"item1";
item2.isPercentage = YES;
item2.yValue =17;
item2.width = 35;
item2.name = #"item2";
[graph setXaxisTitle:#"name"];
[graph setYaxisTitle:#"Percentage"];
[graph setGraphicTitle:#"Histogram"];
[graph setDelegate:self];
[graph setBackgroundColor:[UIColor colorWithRed:220/255.0 green:220/255.0 blue:220/255.0 alpha:1]];
NSArray *items = [[NSArray alloc] initWithObjects:item1,item2,nil];
[graph drawHistogramWithItems:items lineWidth:2 color:[UIColor blackColor]];
}
I am adding this view in GraphsViewController but its not showing anything
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
[self createGraph];
percentages = [NSArray arrayWithObjects:#"80",#"17", nil];
display = [[Display alloc] init];
[self.view addSubview:display];
[display setPercentageArray:percentages];
}
You should do the drawing in a separate UIView object and add it as a subview to your view controller's view. That's the way it is supposed to work.
The UIView class uses an on-demand drawing model for presenting
content.
Source: View Programming Guide for iOS
as opposed to
The UIViewController class provides the fundamental view-management
model for all iOS apps. ... A view controller manages a set of views
that make up a portion of your app’s user interface.
Source: UIViewController Class Reference
Edit:
// ...
display = [[Display alloc] init];
CGRect dFrame = CGRectMake(50, 50, 320, 200); // change these to whatever values you need
[display setFrame:dFrame];
[self.view addSubview:display];
I have looked at a few guides for CAKeyFrameAnimation and I am failing to see how to trigger them. The only thing I can think of is that I have to use it as a return, but that doesn't make much sense to me.
-H File-
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#interface ImageSequenceViewController : UIViewController
<UIGestureRecognizerDelegate>{
UISwipeGestureRecognizer *swipeLeftRecognizer;
NSMutableArray *myImages;
IBOutlet UIImageView *imageView;
IBOutlet UIImageView *bView;
IBOutlet UISegmentedControl *segmentedControl;
}
#property (nonatomic, retain) UISwipeGestureRecognizer *swipeLeftRecognizer;
#property (nonatomic, retain) UIImageView *imageView;
#property (nonatomic, retain) IBOutlet UISegmentedControl *segmentedControl;
-(IBAction)takeLeftSwipeRecognitionEnabledFrom:(UISegmentedControl *)aSegmentedControl;
-(IBAction)ButtonPressed1: (id)sender;
#end
-M File-
#import "ImageSequenceViewController.h"
#implementation ImageSequenceViewController
#synthesize swipeLeftRecognizer;
#synthesize imageView;
#synthesize segmentedControl;
/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
*/
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
//CUSTOM CODE
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
-(void)loadLeft {
//aView = [[UIImageView alloc] initWithFrame:self.view.frame];
CALayer *layer = [CALayer layer];
[layer setFrame:CGRectMake(0.0,
0.0,
[[self view] frame].size.height,
[[self view] frame].size.width)];
myImages = [[NSMutableArray alloc] init];
for(NSUInteger count=0; count<100; count++){
NSString *fileName;
if (count < 10)
{
fileName = [NSString stringWithFormat:#"trailerRotation_000%d", count];
}
else if (10 <= count < 100)
{
fileName = [NSString stringWithFormat:#"trailerRotation_00%d", count];
}
else
{
fileName = [NSString stringWithFormat:#"trailerRotation_0%d", count];
}
NSString *path = [[NSBundle mainBundle] pathForResource:fileName ofType:#"jpg"];
//UIImage *image = [[UIImage alloc] initWithContentsOfFile:fileName];
//[myImages addObject:image];
[myImages addObject:[UIImage imageWithContentsOfFile:path]];
}
CAKeyframeAnimation *anim = [CAKeyframeAnimation animationWithKeyPath:#"Contents"];
[anim setDuration:0.10];
[anim setCalculationMode:kCAAnimationDiscrete];
[anim setRepeatCount:1];
[anim setValues:myImages];
[self.view.layer addSublayer:layer];
[layer addAnimation:anim forKey:#"images"];
//aView.animationImages = myImages;
//aView.animationDuration = 10.00;
//aView.animationRepeatCount = 1;
}
-(void)loadRight {
bView = [[UIImageView alloc] initWithFrame:self.view.frame];
myImages = [[NSMutableArray alloc] init];
for(NSUInteger count=99; count>0; count--){
NSString *countString;
if (count < 10)
{
countString = #"000";
countString = [countString stringByAppendingFormat:#"%d", count];
}
else if (10 <= count < 100)
{
countString = #"00";
countString = [countString stringByAppendingFormat:#"%d", count];
}
else if (100 <= count < 1000)
{
countString = #"00";
countString = [countString stringByAppendingFormat:#"%d", count];
}
NSLog(#"%d", count);
NSString *fileName = #"trailerRotation_";
fileName = [fileName stringByAppendingFormat:countString];
fileName = [fileName stringByAppendingFormat:#".jpg"];
[myImages addObject:[UIImage imageNamed:fileName]];
}
bView.animationImages = myImages;
bView.animationDuration = 10.00;
bView.animationRepeatCount = 1;
}
- (void)viewDidLoad {
[super viewDidLoad];
imageView = [[UIImageView alloc] initWithFrame:self.view.frame];
[imageView setImage:[UIImage imageNamed:#"trailerRotation_0000.jpg"]];
//[self.view addSubview:imageView];
[self loadLeft];
[self loadRight];
UIGestureRecognizer *recognizer;
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipeFrom:)];
[self.view addGestureRecognizer:recognizer];
[recognizer release];
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipeFrom:)];
self.swipeLeftRecognizer = (UISwipeGestureRecognizer *) recognizer;
swipeLeftRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
if ([segmentedControl selectedSegmentIndex] == 0) {
[self.view addGestureRecognizer:swipeLeftRecognizer];
}
self.swipeLeftRecognizer = (UISwipeGestureRecognizer *) recognizer;
[recognizer release];
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
self.segmentedControl = nil;
self.swipeLeftRecognizer = nil;
self.imageView = nil;
}
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (void)viewDidAppear:(BOOL)animated {
[self becomeFirstResponder];
}
-(void)startItLeft {
NSLog(#"Left");
//[aView startAnimating];
//[self.view addSubview:aView];
//[aView release];
[bView release];
}
-(void)startItRight {
NSLog(#"Right");
[bView startAnimating];
[self.view addSubview:bView];
//[aView release];
[bView release];
}
//- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {
//}
//- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event {
//}
//- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event {
//}
-(IBAction)ButtonPressed1:(id)sender
{
NSLog(#"Button");
//[aView stopAnimating];
[bView stopAnimating];
//[self loadLeft];
[self loadRight];
}
-(IBAction)takeLeftSwipeRecognitionEnabledFrom:(UISegmentedControl *) aSegmentControl {
if ([aSegmentControl selectedSegmentIndex] == 0) {
[self.view addGestureRecognizer:swipeLeftRecognizer];
}
else {
[self.view removeGestureRecognizer:swipeLeftRecognizer];
}
}
-(void)handleSwipeFrom:(UISwipeGestureRecognizer *) recognizer {
//CGPoint location = [recognizer locationInView:self.view];
//[self showImageWithText:#"swipe" atPoint:location];
if (recognizer.direction == UISwipeGestureRecognizerDirectionLeft) {
//[self startItLeft];
}
else {
[self startItRight];
}
}
//CUSTOM CODE
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
- (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)dealloc {
[super dealloc];
}
#end
I'm rather new to iOS development so any advice is helpful.
Thanks.
Try:
[myImages addObject:(id)[UIImage imageWithContentsOfFile:path].CGImage];
Since the CAKeyFrameAnimation expects CGImageRef objects.
It looks like you're trying to load up 100 images and cycle them all within the space of 0.1 second. Not only is that pretty ridiculous (that's 1000fps right there, and CoreAnimation is capped at 60fps), but it's likely to take longer than 0.1 seconds for CoreAnimation to copy all the images before it even starts, which means that it will have finished before it started (and therefore no animation will occur).
I'll admit it was a PEBKAC error.
Thanks all for your help.
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. :)