设置系统的viewController modal动画样式

controller.modalTransitionStyle =UIModalTransitionStyleCoverVertical;//设置动画样式
[self presentModalViewController:controller animated:YES];
[self dismissModalViewController Animated:YES];

- (void)transitionFromViewController:(UIViewController *)fromViewController
toViewController:(UIViewController *)toViewController
duration:(NSTimeInterval)duration
options:(UIViewAnimationOptions)options
animations:(void (^)(void))animations
completion:(void (^)(BOOL))completion{
//在此处可以重写ViewController的动画样式
}