Question

I can animate the addition of a UIView to my app, it looks very pretty so thank you apple.

However, how do I animate the removal of this view from the super view?

I’m using:

CATransition *animation = [CATransition animation]; [animation setDuration:1]; [animation setType:kCATransitionReveal]; [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]]; [[myview layer] addAnimation:animation forKey:kCATransitionReveal]; 

to animate the ‘in’ transition … how do you animate the ‘out’ transition????

Answer 1

Animate your view so it moves offscreen/shrinks/expands/fades, then do the actual removal when the animation ends.

You can do this by altering the properties of the view (position/size/offset) between a beginAnimations/commitAnimations block. UIKit will then animate these properties over the time specified.

E.g something like;

[UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.30f]; view.transform =    CGAffineTransformMakeTranslation(     view.frame.origin.x,      480.0f + (view.frame.size.height/2)  // move the whole view offscreen   ); background.alpha = 0; // also fade to transparent [UIView commitAnimations]; 

In the animation end notification you can then remove the view.