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    <p>Are you making your changes inside the Core Animation block?</p> <p>I created a simple view-based iPhone application to test this. The view has two rounded rect UIButton objects:</p> <ol> <li><p>The first button is in the upper right corner with width 62 (and height 35) and initial title "$0.99". It is connected to the "button" outlet and "animate" action in the view controller. This is the button that will be animated when it is tapped.</p></li> <li><p>The second button is at the bottom of the screen with title "Reset" and is connected to the "reset" action in my view controller.</p></li> </ol> <p>Here is the view controller code:</p> <p><strong>UIButtonAnimationTestViewController.h:</strong></p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface UIButtonAnimationTestViewController : UIViewController { IBOutlet UIButton *button; CGRect originalFrame; } - (IBAction)animate; - (IBAction)reset; @end </code></pre> <p><strong>UIButtonAnimationTestViewController.m:</strong></p> <pre><code>#import "UIButtonAnimationTestViewController.h" @implementation UIButtonAnimationTestViewController - (void)viewDidLoad { [super viewDidLoad]; originalFrame = button.frame; } - (IBAction)animate { CGRect frame = button.frame; frame.origin.x -= 30; frame.size.width += 30; [UIView beginAnimations:@"button" context:nil]; button.frame = frame; [button setTitle:@"" forState:UIControlStateNormal]; [UIView setAnimationDelegate:self]; [UIView commitAnimations]; } - (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context { [button setTitle:@"BUY NOW" forState:UIControlStateNormal]; } - (IBAction)reset { button.frame = originalFrame; [button setTitle:@"$0.99" forState:UIControlStateNormal]; } </code></pre>
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    1. POUIButton AppStore buy button animation
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    1. COit does not create the right effect for me. The width is set first, so the Button moves to the new position afterwards. In AppStore the Right-X-Position of the right corners always stay at their position, *like* a scale and translation at the same time.
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    2. COMy code works like the AppStore: the right side of the button does not move. Since we are making both of the changes (translate left and increase width) to a copy of the frame and then changing the button's frame inside the animation block, both changes must animate at the same time.
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    3. COThat works flawlessly my friend.
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