UITextView and UIPickerView with its own UIToolbar - iphone

I like to replicate the form behavior of Safari on the iPhone in my own app. If you enter data in an web form you get a separate UIToolbar (previous, next, done) just above the UIKeyboardView. Same for choosing an option: you get the same UIToolbar just above an UIPickerView.
I am looking for demos / sourcode / ideas how to implement this. Would I create my own subview with that toolbar and textview / pickerview? Is there a more elegant way? Especially something that leverages becomeFirstResponder of UITextfield?

So i created a UIViewCOntroller subclass to manage this.
on that i wrote this function to add.
-(void) addToViewWithAnimation:(UIView *) theView
{
UIView* myview = self.view;
CGRect frame = myview.frame;
frame.origin.y = 420;
myview.frame = frame;
UIView* bgView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 420)];
bgView.backgroundColor = [UIColor blackColor];
bgView.alpha = 0.6;
backgroundView = bgView;
[theView addSubview: bgView]; // this adds in the dark background
[theView addSubview:self.view]; // this adds in the pickerView with toolbar.
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
frame = myview.frame;
frame.origin.y = 420 - frame.size.height;
myview.frame = frame;
[UIView commitAnimations];
}
I then created the view in IB, here is what my class Header looked like at the end of that. (there is also a UItoolbar on the view i just do not have a reference to it in my Controller)
#interface PropertyPickerController : UIViewController {
IBOutlet UIPickerView* Picker;
IBOutlet UIButton* DoneButton;
IBOutlet UIButton* CancelButton;
UIView* backgroundView;
NSArray* SimpleObjects;
id PickerObjectDelegate;
SEL PickerObjectSelector;
}
To then hide the view i use.
-(void) removeFromSuperviewWithAnimation
{
UIView* myview = self.view;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(AnimationDidStop:)];
[UIView setAnimationDuration:0.5];
// set fram below window.
CGRect frame = myview.frame;
frame.origin.y = 420;
myview.frame = frame;
backgroundView.alpha = 0; //fades shade to nothing
[UIView commitAnimations];
}
-(void) AnimationDidStop:(id) object
{
[self.view removeFromSuperview]; //removes view after animations.
[backgroundView removeFromSuperview];
}
And last but not least all the delegate functions for the picker.
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
FBSimpleObject* object = (FBSimpleObject*)[SimpleObjects objectAtIndex:row];
return object.Name;
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{ return 1;}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return [SimpleObjects count];
}
- (IBAction)CancelButtonClick
{
[self removeFromSuperviewWithAnimation];
}
- (IBAction)DoneButtonClick
{
//This performs a selector when the done button is clicked, makes the controller more versatile.
if(PickerObjectDelegate && PickerObjectSelector)
{
NSMethodSignature* signature = [PickerObjectDelegate methodSignatureForSelector:PickerObjectSelector];
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
[invocation setTarget:PickerObjectDelegate];
[invocation setSelector:PickerObjectSelector];
[invocation setArgument:&object atIndex:2];
[invocation retainArguments];
[invocation invoke];
}
}
This is how you do the ToolBar. Basically i use the same concept with a ViewController subclass, and i dont use the standard push view or modal display options. (the example here actually places a Textbox and a toolbar on top of the keyboard.
#interface BugEditCommentController : UIViewController {
UITextView* Comment;
UIToolbar* Toolbar;
}
-(void) addToViewWithAnimation:(UIView*) theView;
To activate this view usually you would call [object becomeFirstResponder];
so if you add this to your view Controller constructor, all you need to do is call [object becomeFirstResponder];
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:#selector(keyboardWillShow:) name: UIKeyboardWillShowNotification object:nil];
[nc addObserver:self selector:#selector(keyboardWillHide:) name: UIKeyboardWillHideNotification object:nil];
abd if you implement this method on your controller (defined in the above code)
-(void) keyboardWillShow:(NSNotification *) note
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
CGRect toolbarFrame = Toolbar.frame;
CGRect keyboardFrame;
CGPoint keyboardCenter;
[[note.userInfo valueForKey:UIKeyboardCenterEndUserInfoKey] getValue:&keyboardCenter];
[[note.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &keyboardFrame];
//CGRect toolbarRect = Toolbar.center;
toolbarFrame.origin.y= keyboardCenter.y - ((keyboardFrame.size.height/2) + (toolbarFrame.size.height));
Toolbar.frame = toolbarFrame;
[UIView commitAnimations];
}
-(void) keyboardWillHide:(id) object
{
//you could call [self removeFromSuperviewHere];
}
-(void) removeFromsuperViewWithAnimation
{
[Comment resignFirstResponder];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(AnimationDidStop:)];
CGRect frame = Toolbar.frame;
frame.origin.y = 480;
Toolbar.frame = frame;
[self.view viewWithTag:1].alpha = 0; //fade transparent black background to clear.
[UIView commitAnimations];
}
-(void)AnimationDidStop:(id) object
{
[self.view removeFromSuperview];
}
hope the additional info helps.

I'm looking for the solution for this issue too.
I found this was the best solution, you can use this SCKit to add tool bar to dismiss the UIPickerView or the UIDatePicker as you want.
Following is github link: https://github.com/scelis/SCKit/tree/
Have fun!

Related

How to specify a size to a UIAlert

I am trying to display a UIImage in a UIAlert.
I want to display it nearly fullscreen. For example my image has a 300x450px size.
Well I add it as a subview to my UIAlert.
But the UIAlert has default coordinates to keep it centered.
So I can add a image bigger than the UIAlert frame, but it covers the UIAlert...
I tried to specify a frame for my UIAlert, but it has no effect on it.
In fact I would like to add my image as a real content of the UIAlert, as well as simple text.
Is this possible ?
Consider writing your own Dialog popup instead of messing with the UIAlertView. If you want the 'bounce-in' animation that can easily be achieved using transform animations. Here is a simple popup dialog box I've just made.
To test it out create a new View-Based Application project and add this class. Then you can test it by adding the 'usage' code below to your *ViewController.m
This is a very simple example to demo the theory. It would make more sense to have a static method in SimpleDialog that shows the popup, but I didn't want to make the example overly complex.
SimpleDialog.h
#import <UIKit/UIKit.h>
#interface SimpleDialog : UIView
{
}
- (void) show;
#end
SimpleDialog.m
#import "SimpleDialog.h"
#define BOUNCE_SPEED 1
#implementation SimpleDialog
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
// Initialization code
self.backgroundColor = [UIColor greenColor];
UIButton* closeButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
closeButton.frame = CGRectMake(0, 0, 200, 20);
closeButton.center = self.center;
[closeButton setTitle:#"Close" forState:UIControlStateNormal];
[closeButton addTarget:self action:#selector(hide) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:closeButton];
}
return self;
}
- (void) show
{
UIWindow* window = [UIApplication sharedApplication].keyWindow;
if (!window)
{
window = [[UIApplication sharedApplication].windows objectAtIndex:0];
}
[window addSubview:self];
self.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.001, 0.001);
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.2*BOUNCE_SPEED];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(bounceInStopped)];
self.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.1, 1.1);
[UIView commitAnimations];
}
- (void)bounceInStopped
{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.15*BOUNCE_SPEED];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(bounceOutStopped)];
self.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.9, 0.9);
[UIView commitAnimations];
}
- (void)bounceOutStopped
{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.15*BOUNCE_SPEED];
self.transform = CGAffineTransformIdentity;
[UIView commitAnimations];
}
- (void) hide
{
[self removeFromSuperview];
}
#end
Usage
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton* popButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
popButton.frame = CGRectMake(0, 0, 200, 20);
popButton.center = self.view.center;
[popButton setTitle:#"Pop" forState:UIControlStateNormal];
[popButton addTarget:self action:#selector(showIt) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:popButton];
}
- (void) showIt
{
SimpleDialog* simple = [[SimpleDialog alloc] initWithFrame:CGRectMake(0, 0, 300, 400)];
simple.center = self.view.center;
[self.view addSubview:simple];
[simple show];
[simple release];
}
Yes this is possible.
But it requires to customize the UIAlertView.
Using UIAlertView customization you can add anything.

How to animate a UITextView that is a subview?

I am trying to animate a UITextView (myTextView) that is a subview inside a UIScrollView (scrollView).
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:myTextView cache:YES];
[scrollView addSubview:myTextView];
[UIView commitAnimations];
myTextView appears without animation!
What kind of animation do you want to do? If you want to fade in, for example, you have to do
[scrollView addSubview:myTextView];
myTextView.alpha = 0.0;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:myTextView cache:YES];
myTextView.alpha = 1.0;
[UIView commitAnimations];
You can change several properties (e.g.: frame, transform) to make animations.
http://www.4shared.com/dir/-PGqZEXR/zoominzoomout.html just add this file with your project and call it through this functions
here im2 is UIVIEW and i paste image on it then passing this through view didload like this
- (void)viewDidLoad {
[self loadFlowersInView:im2];
[self.view addSubview:im2];
}
now attach this function like this
- (void) loadFlowersInView: (UIView *) backdrop {
NSString *create_button = nil; // Add the flowers to random points on the screen
for (int i = 0; i < 1; i++) {
MagPicAppDelegate *appdelegate = (MagPicAppDelegate *)[[UIApplication sharedApplication] delegate];
NSString *whichFlower = appdelegate.imageName;
UIImage *stemp = [UIImage imageNamed:#"approve.png"];
DragView *dragger = [[DragView alloc] initWithImage:stemp];
dragger.userInteractionEnabled = YES;
dragger.center = CGPointMake(160.0f, 140.0f);
[im2 addSubview:dragger];
[dragger release];
}
[self.view addSubview:im2];
[im2 release];
}

keypad hides text view

i am placing a tableview,textview,buttons in a view as like this.
when ever i click on the textview keypad hides textview.To animate up textview i am writing the code as fallows.
- (void) textViewDidBeginEditing:(UITextView *)textView {
[self animateTextField:textView up:YES];
}
- (void) textViewDidEndEditing:(UITextView *)textView {
[self animateTextField:textView up:NO];
}
- (void) animateTextField: (UITextView*) textView up: (BOOL) up {
const int movementDistance = 80; // tweak as needed
const float movementDuration = 0.3f; // tweak as needed
int movement = (up ? -movementDistance : movementDistance);
[UIView beginAnimations: #"anim" context: nil];
[UIView setAnimationBeginsFromCurrentState: YES];
[UIView setAnimationDuration: movementDuration];
self.view.frame = CGRectOffset(self.view.frame, 0, movement);
[UIView commitAnimations];
}
But it does n't take any effect.
And To hide the keypad i am writing this code
-(void) touchesBegan :(NSSet *) touches withEvent:(UIEvent *)event {
[mytextview resignFirstResponder];
}
it is also does n't take any effect.
can any one please help me.
Thank u in advance.
For resigning keyboard;
Make a ToolBar with bar button and add an IBAction for this and set its y coordinate below the 480(screen hieght)
-(IBAction)hide
{
[mytextview resignFirstResponder];
}
and in viewWillAppear use
myTextView.inputAccessoryView=tlBar;
And add two notification in viewWillAppear for keyboard
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:#selector(keyboardWillShow:) name: UIKeyboardWillShowNotification object:nil];
[nc addObserver:self selector:#selector(keyboardWillHide:) name: UIKeyboardWillHideNotification object:nil];
and then use these methods for Animation
-(void) keyboardWillShow:(NSNotification *) note
{
if(isAnimate)
[self viewAnimateUpper];
}
-(void)viewAnimateUpper
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:.3];
CGRect viewFrame=self.view.frame;
viewFrame.origin.y -=95;//according to you
self.view.frame=viewFrame;
[UIView commitAnimations];
}
-(void)viewAnimatedown
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:.3];
CGRect viewFrame=self.view.frame;
viewFrame.origin.y +=95;//according to you
self.view.frame=viewFrame;
[UIView commitAnimations];
}
-(void) keyboardWillHide:(NSNotification *) note
{
if(isAnimate)
{
[self viewAnimatedown];
}
}
Edit:
use textviewShouldBegainEditing
and in this set a boolvariable to yes if your desired textView call this method
isAnimate=YES;
I didn't find a chance to see you view,since my browser says "The image cant be dispalyed,It contains errors."
So try the following options.
Chk whether you have set the delegate of the textField to the files owner.If you have set and still not working,please try the below one.Its like animating the entire view up and down on textedits.
Please make use of the below code.This works for me.What you have to do is double click the .xib file where you want to add text fields.The view along with a window containing file's owner,first responder and a view will also be opened.
Use cmd+shift+l to open the library and add another view.In your .h file add a IBOutlet for the view as IBOutlet UIView *secondview and map to the file's owner.
Now put the text fields whichever has to moved in the second view.Now the default view which will appear when open the .xib file will contain nothing.It will be blank and the controls whichever you have to display will be on the second view.
In the .m file add the second view to the main view as
[self.view addSubview:secondView];
and use this code by customizing the text field names as you wish.
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
CGRect viewFrame = self.view.frame;
if(textField==textfield1)
{
[textfield1 resignFirstResponder];
[textfield2 becomeFirstResponder];
}
else if(textField== textfield2)
{
[textfield2 resignFirstResponder];
[textfield3 becomeFirstResponder];
}
else if(textField== textfield3)
{
[textfield3 resignFirstResponder];
[textfield4 becomeFirstResponder];
}
else if(textField== textfield4)
{
[textfield4 resignFirstResponder];
}
return YES;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
CGRect viewFrame = secondView.frame;
CGRect textFieldRect =[secondView.window convertRect:textField.bounds fromView:textField];
CGRect viewRect =[secondView.window convertRect:secondView.bounds fromView:secondView];
CGFloat midline = textFieldRect.origin.y + 0.5 * textFieldRect.size.height;
CGFloat numerator =midline - viewRect.origin.y- MINIMUM_SCROLL_FRACTION * viewRect.size.height;
CGFloat denominator =(MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION)* viewRect.size.height;
CGFloat heightFraction = numerator / denominator;
if (heightFraction 1.0)
{
heightFraction = 1.0;
}
UIInterfaceOrientation orientation =[[UIApplication sharedApplication] statusBarOrientation];
if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown)
{
animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction);
}
else
{
animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);
}
viewFrame.origin.y -= animatedDistance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[secondView setFrame:viewFrame];
[UIView commitAnimations];
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
CGRect viewFrame = secondView.frame;
viewFrame.origin.y +=animatedDistance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[secondView setFrame:viewFrame];
[UIView commitAnimations];
}
Let me know does this worked.

keyboard hiding my textview

i have a simple app, it consist of 2 textview, 1 uiview as a coretext subclass, and then 1 scrollview. the others part is subviews from scrollview. I use this scrollview because i need to scroll the textviews and uiview at the same time. I already scroll all of them together, but the problem is, the keyboard hiding some lines in the textview. I have to change the frame of scrollview when keyboard appear, but it still not help.
This is my code :
UIScrollView *scrollView;
UIView *viewTextView;
UITextView *lineNumberTextView;
UITextView *codeTextView;
-(void) viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:#selector(keyboardWillAppear:)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:#selector(keyboardWillDisappear:)
name:UIKeyboardWillHideNotification
object:nil];
self.scrollView.frame = CGRectMake(0, 88, self.codeTextView.frame.size.width,
self.codeTextView.frame.size.height);
scrollView.contentSize = CGSizeMake(self.view.frame.size.width, viewTextView.frame.size.height);
[scrollView addSubview:viewTextView];
CGAffineTransform translationCoreText = CGAffineTransformMakeTranslation(60, 7);
[viewTextView setTransform:translationCoreText];
[scrollView addSubview:lineNumberTextView];
[self.scrollView setScrollEnabled:YES];
[self.codeTextView setScrollEnabled:NO];
}
-(void)keyboardWillAppear:(NSNotification *)notification {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:[[[notification userInfo]
objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]];
CGRect keyboardEndingUncorrectedFrame = [[[notification userInfo]
objectForKey:UIKeyboardFrameEndUserInfoKey ] CGRectValue];
CGRect keyboardEndingFrame =
[self.view convertRect:keyboardEndingUncorrectedFrame
fromView:nil];
self.scrollView.frame = CGRectMake(0, 88, self.codeTextView.frame.size.width,
self.codeTextView.frame.size.height - keyboardEndingFrame.size.height);
[UIView commitAnimations];
}
-(void)keyboardWillDisappear:(NSNotification *) notification {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:[[[notification userInfo]
objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]];
CGRect keyboardEndingUncorrectedFrame = [[[notification userInfo]
objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGRect keyboardEndingFrame =
[self.view convertRect:keyboardEndingUncorrectedFrame
fromView:nil];
self.scrollView.frame = CGRectMake(0, 88, self.codeTextView.frame.size.width,
self.codeTextView.frame.size.height + keyboardEndingFrame.size.height);
[UIView commitAnimations];
}
can somebody help me please?
UPDATE
this is a pic from this problem :
some text still hiding by the keyboard after i do my code
UPDATE AGAIN
i think the keyboard still hiding the text because i set the textview scroll enable to be NO. is that right??
i have add this code to the keyboardwillappear method
codeBuilderSelectedRange = self.codeTextView.selectedRange;
[self.viewTextViewScroll setContentOffset:CGPointMake(0, (CGFloat)codeBuilderSelectedRange.location) animated:YES];
but it just make the textview dissappear from the view...can somebody tell the answer?
#pragma mark -------------------------
#pragma mark TextView delegate Methods
- (void)textViewDidBeginEditing:(UITextView *)textView {
UIView *parentView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 60, 44)];
UIButton *infoButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 6, 60, 32)];
[infoButton setBackgroundImage:[UIImage imageNamed: #"back-btn.png"] forState:UIControlStateNormal];
[infoButton setTitle:#"Done" forState:UIControlStateNormal];
infoButton.titleLabel.font = [UIFont systemFontOfSize:13.0f];
[infoButton addTarget:self action:#selector(resignTextView) forControlEvents:UIControlEventTouchUpInside];
[parentView addSubview:infoButton];
[infoButton release];
UIBarButtonItem *customBarButtomItem = [[UIBarButtonItem alloc] initWithCustomView:parentView];
[parentView release];
self.navigationItem.rightBarButtonItem = customBarButtomItem;
[customBarButtomItem release];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
[UIView commitAnimations];
CGRect frame = self.scrollView.frame;
self.scrollView.frame.size.height = 206;
//[self.view setContentOffset:CGPointMake(0,320)];
}
- (void)resignTextView {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
[UIView commitAnimations];
CGRect frame = self.scrollView.frame;
self.scrollView.frame.size.height = 460;
[messageTextView resignFirstResponder];
self.navigationItem.rightBarButtonItem = nil;
}
Here is some code that I have used. Basically, what we're going to do is animate the position of the view whenever a UITextField gets focus. To do this, we must make our UIViewController a delegate of our UITextFields
The first delegate method you need to implement is - (void)textFieldDidBeginEditing:(UITextField *)textField
static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3;
static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2;
static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8;
static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 216;
static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 162;
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
CGRect textFieldRect = [self.view.window convertRect:textField.bounds
fromView:textField];
CGRect viewRect = [self.view.window convertRect:self.view.bounds
fromView:self.view];
CGFloat midline = textFieldRect.origin.y + 0.5
* textFieldRect.size.height;
CGFloat numerator = midline - viewRect.origin.y
- MINIMUM_SCROLL_FRACTION * viewRect.size.height;
CGFloat denominator = (MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION)
* viewRect.size.height;
CGFloat heightFraction = numerator / denominator;
if (heightFraction < 0.0)
{
heightFraction = 0.0;
}
else if (heightFraction > 1.0)
{
heightFraction = 1.0;
}
UIInterfaceOrientation orientation =
[[UIApplication sharedApplication] statusBarOrientation];
if (orientation == UIInterfaceOrientationPortrait ||
orientation == UIInterfaceOrientationPortraitUpsideDown)
{
animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction);
}
else
{
animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);
}
CGRect viewFrame = self.view.frame;
viewFrame.origin.y -= animatedDistance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[self.view setFrame:viewFrame];
[UIView commitAnimations];
}
}
Now that the view has been 'pushed up' when a UITextField is selected, we want to make sure that we slide it back down when we're done:
- (void) textFieldDidEndEditing:(UITextField *)textField
{
CGRect viewFrame = self.view.frame;
viewFrame.origin.y += animatedDistance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[self.view setFrame:viewFrame];
[UIView commitAnimations];
}
This was taken from one of my favorite Cocoa blogs, Cocoa With Love. Cheezy name, but Matt's got some great posts on Objective-C development.
Specifically for UITextView (not UITextField)
you may have a look at the following tutorial: http://codingcluster.blogspot.in/2012/03/iphone-make-uitextview-move-up-when.html
i have implemented it and it is working as expected(at least for me)

move up UIToolbar

I have a UIToolbar at bottom of my view, and I have a UITextField in this toolbar. When I begin editing this field, it is hidden behind the keyboard. To see what I've typed, I want to move the toolbar up at the moment the keyboard is presented (and then move it back down when I've finished editing).
How do I move this UIToolbar up/down?
add your viewController class to the list of observers of UIKeyboardWillShowNotification/UIKeyboardWillHideNotification. then you can move your view to make your textView visible. You can also get animation parameters from this notifications to synchronize your animation with keyboard animation parameters of the current OS version. this code I've used for paging
- (void) viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(liftMainViewWhenKeybordAppears:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(returnMainViewToInitialposition:) name:UIKeyboardWillHideNotification object:nil];
}
- (void) viewWillDisappear:(BOOL)animated{
[super viewWillDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
in the methods below I set two methods to handle keyboard notifications. and here are this methods:
- (void) liftMainViewWhenKeybordAppears:(NSNotification*)aNotification{
NSDictionary* userInfo = [aNotification userInfo];
NSTimeInterval animationDuration;
UIViewAnimationCurve animationCurve;
CGRect keyboardFrame;
[[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];
[[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] getValue:&animationDuration];
[[userInfo objectForKey:UIKeyboardBoundsUserInfoKey] getValue:&keyboardFrame];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:animationDuration];
[UIView setAnimationCurve:animationCurve];
[self.view setFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y - keyboardFrame.size.height, self.view.frame.size.width, self.view.frame.size.height)];
[UIView commitAnimations];
}
- (void) returnMainViewToInitialposition:(NSNotification*)aNotification{
NSDictionary* userInfo = [aNotification userInfo];
NSTimeInterval animationDuration;
UIViewAnimationCurve animationCurve;
CGRect keyboardFrame;
[[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];
[[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] getValue:&animationDuration];
[[userInfo objectForKey:UIKeyboardBoundsUserInfoKey] getValue:&keyboardFrame];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:animationDuration];
[UIView setAnimationCurve:animationCurve];
[self.view setFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y + keyboardFrame.size.height, self.view.frame.size.width, self.view.frame.size.height)];
[UIView commitAnimations];
}
Thanks that worked!
Here is a slight improvement:
- (void) liftMainViewWhenKeybordAppears:(NSNotification*)aNotification{
[self scrollViewForKeyboard:aNotification up:YES];
}
- (void) returnMainViewToInitialposition:(NSNotification*)aNotification{
[self scrollViewForKeyboard:aNotification up:NO];
}
- (void) scrollViewForKeyboard:(NSNotification*)aNotification up: (BOOL) up{
NSDictionary* userInfo = [aNotification userInfo];
// Get animation info from userInfo
NSTimeInterval animationDuration;
UIViewAnimationCurve animationCurve;
CGRect keyboardFrame;
[[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];
[[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] getValue:&animationDuration];
[[userInfo objectForKey:UIKeyboardBoundsUserInfoKey] getValue:&keyboardFrame];
// Animate up or down
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:animationDuration];
[UIView setAnimationCurve:animationCurve];
[self.view setFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y + (keyboardFrame.size.height * (up?-1:1)), self.view.frame.size.width, self.view.frame.size.height)];
[UIView commitAnimations];
}
Building on the answers above and using the convenience method [UIView animateWithDuration...]. Observe the will show/hide keyboard notifications and use these handlers.
- (void)keyboardWillShow:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
NSNumber *durationValue = info[UIKeyboardAnimationDurationUserInfoKey];
NSNumber *curveValue = info[UIKeyboardAnimationCurveUserInfoKey];
NSValue *endFrame = info[UIKeyboardFrameEndUserInfoKey];
[UIView animateWithDuration:durationValue.doubleValue
delay:0
options:(curveValue.intValue << 16)
animations:^{
self.navigationController.toolbar.frame = CGRectMake(0,
[endFrame CGRectValue].origin.y - self.navigationController.toolbar.bounds.size.height,
self.navigationController.toolbar.bounds.size.width,
self.navigationController.toolbar.bounds.size.height);
}
completion:nil];
}
- (void)keyboardWillHide:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
NSNumber *durationValue = info[UIKeyboardAnimationDurationUserInfoKey];
NSNumber *curveValue = info[UIKeyboardAnimationCurveUserInfoKey];
[UIView animateWithDuration:durationValue.doubleValue
delay:0
options:(curveValue.intValue << 16)
animations:^{
self.navigationController.toolbar.frame = CGRectMake(0,
self.view.bounds.size.height - self.navigationController.toolbar.bounds.size.height,
self.navigationController.toolbar.bounds.size.width,
self.navigationController.toolbar.bounds.size.height);
}
completion:nil];
}
Thank you so much for this; it works great. However, the code as presented has 2 limitations as I experienced them:
1) The view being repositioned simply slides up out of the screen rather than resizing to fit the space available after the keyboard appears
2) Repeat notifications due to switching text fields continue to apply the frame change, causing the view to incrementally fly off the screen.
The cause is that the above is a reposition relative to the view's current frame rather than a resize relative to the keyboard. Here are two amended lines of code which fix this:
In liftMainViewWhenKeybordAppears:, resize rather than reposition, relative to the keyboard:
keyboardFrame = [self.view.window convertRect:keyboardFrame toView:self.view.superview];
CGRect superviewFrame = [self.view.window convertRect:self.view.superview.frame toView:self.view];
[self.view setFrame:CGRectMake(self.view.frame.origin.x,
self.view.frame.origin.y,
self.view.frame.size.width,
superviewFrame.size.height - keyboardFrame.size.height)];
In returnMainViewToInitialposition:, change the animation to this setFrame: (essentially akin to the identity transform).
[self.view setFrame:CGRectMake(self.view.frame.origin.x,
self.view.frame.origin.y,
self.view.frame.size.width,
keyboardFrame.origin.y + keyboardFrame.size.height)];
Here is a more elegant solution using uiview category
#import <Foundation/Foundation.h>
#interface UIView(AnimationUtils)
-(void)scrollControlToCenter:(UIView *)view;
-(void)scrollViewToOriginalPosition;
#end
#import "UIView+AnimationUtils.h"
#implementation UIView(AnimationUtils)
#pragma mark ScrollView Methods
//Method Called whenever keyboard appears
- (void)scrollControlToCenter:(UIView *)view {
if([view isKindOfClass:[UITextField class]]){
CGRect viewFrame = [view frame];
float verticalDistance = 216.0f - viewFrame.origin.y - (2*viewFrame.size.height);
if(viewFrame.size.height >= (460 - 216)/2){
verticalDistance = 0;
}
[UIView beginAnimations:#"ScrollToCenter" context:nil];
[UIView setAnimationDuration:0.5];
[self setFrame:CGRectMake(0, verticalDistance, self.frame.size.width, self.frame.size.height)];
[UIView commitAnimations];
}else if([view isKindOfClass:[UITextView class]]){
[UIView beginAnimations:#"ScrollToTop" context:nil];
[UIView setAnimationDuration:0.5];
UIView *viewBG = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
[viewBG setTag:5];
[viewBG setBackgroundColor:[UIColor blackColor]];
[viewBG setAlpha:0.75];
[self addSubview:viewBG];
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, view.frame.size.height)];
[self setFrame:CGRectMake(0, -view.frame.origin.y , self.frame.size.width, self.frame.size.height)];
[self insertSubview:view atIndex:[self.subviews count] + 1];
[UIView commitAnimations];
}
}
-(void)scrollViewToOriginalPosition{
[UIView beginAnimations:#"ScrollToOriginal" context:nil];
[UIView setAnimationDuration:0.5];
for(UIView *view in self.subviews){
if(view.tag == 5){
[view removeFromSuperview];
}
}
[self setFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
[UIView commitAnimations];
}
#pragma mark -
#end