最近一直研究 UIView 之间 的切换 有一点点小成就 
发一子视图从父视图删除的切换效果代码


1.        [UIView beginAnimations:@"View Flip" context:nil];
2.        [UIView setAnimationDuration:1.25];
3.        [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
4.       
5.        UIViewController *coming = [[UIViewController alloc] init];
6.        UIViewController *going =  [[UIViewController alloc] init];
7.        UIViewAnimationTransition transition;
8.       
9.        coming.view = self.view.superview;
10.        going.view = self.view;
11.        transition = UIViewAnimationTransitionCurlUp;
12.   
13.       
14.        [UIView setAnimationTransition:transition forView:self.view.superview cache:YES];
15.   
16.        [coming viewWillAppear:YES];
17.        [going viewWillDisappear:YES];
18.        [going.view removeFromSuperview];
19.        [going viewDidDisappear:YES];
20.        [coming viewDidAppear:YES];
21.       
22.        [UIView commitAnimations];