动画效果一

两个UIView之间的翻转可以用动画效果翻转(上下，左右)

UIViewController之间的切换除了UINavigationController里面的pushViewController和 popViewController与UITalbarController在viewControllers之间的切换外， 我们还可以在其他地方自由的进行ViewController切换：

MyViewController *_myViewController = [[MyViewController alloc] init];

_myViewController.modalTransitionStyle =UIModalTransitionStyleFlipHorizontal;

[selfpresentModalViewController: _myViewController Animated: YES];

[_myViewController release];

有四种切换形式（modalTransitionStyle）：

UIModalTransitionStyleFlipHorizontal

UIModalTransitionStyleCoverVertical (default)

UIModalTransitionStyleCrossDissolve

UIModalTransitionStylePartialCurl

退回方法：[selfdismissModalViewControllerAnimated:YES];

与此对应的是播放视频时：

[selfpresentMediaPlayerViewController:moviePlayer Animated:YES];

[selfdismissMediaPlayerViewControllerAnimated:YES];

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实现UINavigationController视图切换

- (void)dismissModalViewControllerAnimated:(BOOL)animated

- (void)presentModalViewController:(UIViewController *)modalViewController animated:(BOOL)animated

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated

- (UIViewController *)popViewControllerAnimated:(BOOL)animated

这4个方法，两两对应，前2个是上下推，后面2个是左右推

实现pushViewController:animated:的不同页面转换特效

1. 首先要明确的是,不使用pushViewController的默认动画,所以在调用这个函数时,要将animated设置为NO.

2. 使用普通的来CATransition实现转换效果,代码如下:

CATransition *animation = [CATransition animation];

[animation setDuration:0.3];

[animation setType: kCATransitionMoveIn];

[animation setSubtype: kCATransitionFromTop];

[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault]];

[self.navigationController pushViewController:m_poseAddIssueViewController animated:NO];

[self.navigationController.view.layer addAnimation:animation forKey:nil];