UIView Animation 动画效果

????[UIView beginAnimations:@"View Flip" context:nil]; ????[UIView setAnimationDuration:1.25]; ????[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; ???? ????UIViewController *coming = [[UIViewController alloc] init]; ????UIViewController *going =??[[UIViewController alloc] init]; ????UIViewAnimationTransition transition; ???? ????coming.view = self.view.superview; ????going.view = self.view; ????transition = UIViewAnimationTransitionCurlUp; ???? ????[UIView setAnimationTransition:transition forView:self.view.superview cache:YES]; ????[coming viewWillAppear:YES]; ????[going viewWillDisappear:YES]; ????[going.view removeFromSuperview]; ????[going viewDidDisappear:YES]; ????[coming viewDidAppear:YES]; ???? ????[UIView commitAnimations];