如何通过水效果切换内容视图？

Question

In the Photos app, there is a nice water drop effect used for transition. I had seen an app a while ago that used this same water effect transition for it's content views.

Unfortunately, this transition type is not listed in the UIViewAnimationTransition documentation. But since this third party app used it (I don't remember it's name), I guess that there is a way of using it.

Does anyone know?

Answer 1

It is not part of the published SDK. If you want to sell your app in the app store, you need to implement this yourself.

Answer 2

I think it's just a hidden CATransition type:

CATransition *transition = [CATransition animation];
transition.type = @"rippleEffect";
transition.duration = 5.0f;
transition.timingFunction = UIViewAnimationCurveEaseInOut;
[self.layer addAnimation:transition forKey:@"transitionViewAnimation"];

(Note: I haven't tried this for rippleEffect but I have used suckEffect and spewEffect similarly)