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POUIView animation with CGAffineTransformMakeScale changes size instantly with decimal number
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copied!<pre><code>- (void)startAnimation { //reverse - shrinking from full size if (_reversed == YES) { //self.transform = CGAffineTransformMakeScale(1.0, 1.0); [UIView animateWithDuration:1.0f delay:0.0f options:UIViewAnimationOptionCurveLinear animations:^{ self.transform = CGAffineTransformMakeScale(0.1, 0.1); //this line does it instantly self.alpha = 0; } completion:^(BOOL finished) { [self removeFromSuperview]; }]; } else { //non reverse - expanding from middle self.transform = CGAffineTransformMakeScale(0.001, 0.001); [UIView animateWithDuration:1.0f delay:0.0f options:UIViewAnimationOptionCurveLinear animations:^{ self.transform = CGAffineTransformMakeScale(1.0, 1.0); self.alpha = 0; } completion:^(BOOL finished) { [self removeFromSuperview]; }]; } } </code></pre> <p>The non reverse piece of code does work fine as I expect, however when I do the _reversed == YES bit, the transformation inside the animation block happens instantly. If I comment that line of code, then the view stays the right size, but if i uncomment it then it shrinks instantly but the alpha still does the fade animation. Why does this happen?</p> <p>Edit: I figured out what happened but I don't know how to fix it. The view does do the animation, only the size of the view changes instantly but it still 'slides' into the centre as if it is shrinking (what you see is just a small rectangle sliding to the middle as if it's the top left corner of the object). If I scale the view to 2 first, then scale down to 1 the animation works fine, its only when going from 1 to a decimal number that it doesn't work. Also I used draw rect to create an object with core graphics and the transform problem affects that, but not the actual frame if a set background colour.</p>

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