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POScaling an UIButton vertically only from the bottom
 

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  1. POScaling an UIButton vertically only from the bottom
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    <p>I'm trying to animate the scaling of an UIButton but am having difficulties getting it to animate the way I want it to. </p> <p>I have a UIButton set up with a stretchable UIImage. I want its height to scale to a certain size and give it the effect that it is 'growing'. I use the code below, but it animates the UIButton growing from top and bottom, rather than just bottom. See the code here:</p> <pre><code>myButton.transform = CGAffineTransformMakeScale(1,0.5); myButton.alpha = 0.6f; [UIView beginAnimations:@"myButton" context:nil]; [UIView setAnimationDuration:0.5]; myButton.transform = CGAffineTransformMakeScale(1,1); myButton.alpha = 1.0f; [UIView commitAnimations]; </code></pre> <p>It's hard to explain, basically I want the UIButton to grow from only one side (the bottom) rather than it grow by expanding both sides. Any suggestions?</p> <hr> <p>UPDATE</p> <p>I also tried changing the button's frame and that did not work either. This time, no animation was seen at all. This is my code:</p> <pre><code>CGRect buttonRect = CGRectMake(0, 0, 150, 22); UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom]; myButton.frame = buttonRect; myButton.alpha = 0.6f; [self.view addSubview:myButton]; [UIView beginAnimations:@"myButton" context:nil]; [UIView setAnimationDuration:0.3]; CGRect buttonRect2 = CGRectMake(0, 0, 150, 52); myButton.frame = buttonRect2; myButton.alpha = 1.0f; [UIView commitAnimations]; </code></pre> <p>Any ideas why it is not animating at all? I'm assuming it has something to do with how I'm setting the frame?</p>
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    1. USMatthias Bauch
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