Question

I want to create an animation that the imageView will become more and more small and transparent, then disappear. I tried below code, it doesn’t work, when run it will grow from 0.01 size to the original size. I can’t figure out where the problem is.

Thank you very much!

[UIView animationWithDuration:2 animations:^{
[imageview setTransform:(CGAffineTransformMakeScale(0.01,0.01))];
[imageview setAlpha:0];
}
completion:^(BOOL finished){
[imageview removeFromSuperview];
}];

Answer 1

Try this code:

[UIView animationWithDuration:2 animations:^{
CGAffineTransform *transform =  CGAffineTransformScale(imageView.transform, 0.01, 0.01);
[imageview setTransform:transform];
[imageview setAlpha:0];
}
completion:^(BOOL finished){
[imageview removeFromSuperview];
}];

This will take in consider the existing imageView transform. (Is there a chance you already applied transform to this imageView?)

An other thing you can try is to add: UIViewAnimationOptionBeginFromCurrentState
as an option to the animation method. You will have to use :

+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion{

}