某些场景下需要push的动画是present方式的，或者present的动画是push方式的。

<CAAnimationDelegate>

/**
 push，以模态的方式弹出
 */
- (void)wzl_pushViewController:(UIViewController *)controller animated:(BOOL)animated {
    CATransition *transition = [CATransition animation];
    transition.duration = 0.3f;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionMoveIn;
    transition.subtype = kCATransitionFromTop;
    transition.delegate = self;
    [self.navigationController.view.layer addAnimation:transition forKey:nil];
    [self.navigationController pushViewController:controller animated:NO];
}

/**
 push，以模态的方式退出
 */
- (void)wzl_popViewControllerAnimated:(BOOL)animated {
    CATransition *transition = [CATransition animation];
    transition.duration = 0.3f;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionReveal;
    transition.subtype = kCATransitionFromBottom;
    transition.delegate = self;
    [self.navigationController.view.layer addAnimation:transition forKey:nil];
    [self.navigationController popViewControllerAnimated:NO];
}

/**
 push，popToRoot以模态的方式退出
 */
- (void)wzl_popToRootViewControllerAnimate:(BOOL)animated{
    CATransition *transition = [CATransition animation];
    transition.duration = 0.3f;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionReveal;
    transition.subtype = kCATransitionFromBottom;
    transition.delegate = self;
    [self.navigationController.view.layer addAnimation:transition forKey:nil];
    [self.navigationController popToRootViewControllerAnimated:NO];
}

/**
 present，以push的方式推出
 */
- (void)wzl_presentViewController:(UIViewController *)controller animated:(BOOL)animated completion:(void(^)(void))completion {
    CATransition *transition = [CATransition animation];
    transition.duration = 0.3f;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionMoveIn;
    transition.subtype = kCATransitionFromRight;
    [[[UIApplication sharedApplication].keyWindow layer]addAnimation:transition forKey:nil];
    [self presentViewController:controller animated:NO completion:completion];
}

/**
 present，以push的方式退出
 */
- (void)wzl_dismissViewControllerAnimated:(BOOL)animated completion:(void(^)(void))completion {
    CATransition *transition = [CATransition animation];
    transition.duration = 0.3f;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionMoveIn;
    transition.subtype = kCATransitionFromLeft;
    [[[UIApplication sharedApplication].keyWindow layer]addAnimation:transition forKey:nil];
    [self dismissViewControllerAnimated:NO completion:completion];
}