How can I replicate the trashing animation of Mail.app

In my iPhone app, I have put a UIBarBUtton of type UIBarButtonSystemItemTrash in my UIToolBar. When pressed, I'd like to replicate the animation of Mail.app: the bin opens, the UIView folds and flies into it.
Is there a way to access this animation ithrough the iPhone SDK?

Presently I am using a custom made animation, but there are some limits; for example, I cannot animate the bin itself. Do you have any suggestion? Code samples?

Cheers,
Davide

Solution 1:

Use the suckEffect type on an animation. Also: spewEffect, genieEffect, unGenieEffect, twist, tubey, swirl, cameraIris, cameraIrisHollowClose, cameraIrisHollowOpen, rippleEffect, charminUltra, zoomyIn, and zoomyOut. Doesn't work in the simulator.

CATransition *animation = [CATransition animation];
animation.type = @"suckEffect";
animation.duration = 2.0f;
animation.timingFunction = UIViewAnimationCurveEaseInOut;
view.opacity = 1.0f;
[view.layer addAnimation:animation forKey:@"transitionViewAnimation"];

Note: Code snippet was pulled from a larger codebase. I hope it works :)

Solution 2:

Just to add some info:

1. You can use "suckEffect" with the standard +[UIView setAnimationTransition:forView:cache:]. Just pass the number 103 to the animationTransition variable. This won't avoid your app being rejected by Apple though :p
2. "spewEffect", "genieEffect", "unGenieEffect", etc. no longer exist on iPhoneOS 3.x. The only undocumented transition left are "cube" (--), "rippleEffect" (110), the three "cameraIris" effects (105,106,107) and "suckEffect" (103).

See http://www.iphonedevwiki.net/index.php?title=UIViewAnimationState for detail.

Also, to animate the bin (with private API): http://www.iphonedevwiki.net/index.php?title=UIToolbar#Animating_the_trash_can_icon.