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POiOS translation and scale animation
 

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  1. POiOS translation and scale animation
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    <p>I'm working on UIButton animation where:</p> <p>The <code>UIButton</code> is set in the bottom center of the screen and scaled to a small size</p> <pre><code>_menuBtn.transform = CGAffineTransformMakeScale(0.1f, 0.1f); </code></pre> <p>When the app starts it should be moving to the bottom left side of the screen as it scales or grow to its original size.</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; _menuBtn.frame = CGRectMake(160, 513, 30, 30); _menuBtn.superview.frame = CGRectMake(160, 513, 30, 30); _menuBtn.transform = CGAffineTransformMakeScale(0.1f, 0.1f); NSLog(@"_menuBtn: %@ ; _menuBtn.superview: %@", _menuBtn, _menuBtn.superview); [UIView beginAnimations:nil context:nil]; [UIView setAnimationDelegate:self]; [UIView setAnimationDuration:5]; [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; CGAffineTransform scaleTrans = CGAffineTransformMakeScale(1.0f, 1.0f); CGAffineTransform lefttorightTrans = CGAffineTransformMakeTranslation(-200.0f,0.0f); _menuBtn.transform = CGAffineTransformConcat(scaleTrans, lefttorightTrans); [UIView commitAnimations]; } </code></pre> <p><strong>problem</strong></p> <p>When the animation starts the button starts moving from the bottom right side of the screen and not in the bottom center where it is and should be. Any help ?</p> <p><strong>Log Result</strong></p> <pre><code>NSLog(@"%@", _myBtn); 2013-08-14 09:22:38.913 GJCoolNavi[339:c07] &lt;UIButton: 0x813ea30; frame = (0 0; 0 0); opaque = NO; autoresize = TM+BM; layer = &lt;CALayer: 0x813eaf0&gt;&gt; </code></pre> <p>thats before doing the animation...and the result after the animation is:</p> <pre><code>2013-08-14 09:30:25.719 GJCoolNavi[612:c07] &lt;UIButton: 0x71206d0; frame = (160 294; 0 0); opaque = NO; autoresize = TM+BM; animations = { transform=&lt;CABasicAnimation: 0x7536a80&gt;; position=&lt;CABasicAnimation: 0x7537dd0&gt;; }; layer = &lt;CALayer: 0x7120790&gt;&gt; </code></pre>
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    1. USJrey Quiros
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    1. COmy first thought might be irrelevant for the topic, but why haven't you used block-based animation as the Apple recommends on iOS4 or above?
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      1. POiOS translation and scale animation
      1. USholex
    2. COFirst thing I thought too. It's in my answer, apparently it still doesn't work. Still trying to work out what is happening and why.
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      1. USFogmeister
 

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