我正在尝试自定义演示动画,但VC是MPMoviePlayerViewController.我正在学习本教程：
当我呈现MPMoviePlayerViewController时,一切都是正确的.
但是当我解雇它时,只需要方法：
- (id <UIViewControllerAnimatedTransitioning>)animationControllerFordismissedController:(UIViewController *)dismissed
不叫,我做错了什么？
这是代码：
- (IBAction)playButtonTouchedIn:(id)sender {
NSURL *url = [[NSBundle mainBundle]URLForResource:@"Learn to speak Spanish quickly with funny videos on youtube" withExtension:@"mp4"];
MPMoviePlayerViewController *player = [[MPMoviePlayerViewController alloc]initWithContentURL:url];
player.transitioningDelegate = self;
player.modalTransitionStyle = UIModalPresentationCustom;
[player.moviePlayer setShouldAutoplay:NO];
player.moviePlayer.controlStyle = MPMovieControlStyleNone;
[self presentViewController:player animated:YES completion:^{
[player.moviePlayer play];
player.moviePlayer.controlStyle = MPMovieControlStyleFullscreen;
}];
}
UIViewControllerTransitioningDelegate方法：
- (id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController: (UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source
{
self.presenting = YES;
return self;
}
- (id <UIViewControllerAnimatedTransitioning>)animationControllerFordismissedController:(UIViewController *)dismissed
{
self.presenting = NO;
return self;
}
UIViewControllerAnimatedTransitioning方法
- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext
{
return 0.7;
}
- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext
{
UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
if (self.isPresenting) {
[fromViewController.view setUserInteractionEnabled:NO];
[transitionContext.containerView addSubview:fromViewController.view];
[transitionContext.containerView addSubview:toViewController.view];
CGRect startFrame = toViewController.view.frame;
toViewController.view.frame = (CGRect){CGPointMake(toViewController.view.frame.size.width,0),startFrame.size};
[UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0f usingSpringWithdamping:0.5f initialSpringVeLocity:4.0f options:UIViewAnimationoptionCurveEaSEOut animations:^{
toViewController.view.frame = startFrame;
} completion:^(BOOL finished) {
[transitionContext completeTransition:YES];
[fromViewController.view setUserInteractionEnabled:YES];
}];
}
else{
[toViewController.view setUserInteractionEnabled:YES];
[transitionContext.containerView addSubview:toViewController.view];
[transitionContext.containerView addSubview:fromViewController.view];
CGRect finalFrame = (CGRect){CGPointMake(-fromViewController.view.frame.size.width,fromViewController.view.frame.size};
[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
fromViewController.view.frame = finalFrame;
} completion:^(BOOL finished) {
[transitionContext completeTransition:YES];
}];
}
}
我尝试过用我开发的视图控制器,它工作得很好,所以应该是MPMoviePlayerViewController吗？
解决方法
我在解雇时能够正确设置动画的方法是在调用[presentViewController dismissViewControllerAnimated：YES]之前重新设置transitioningDelegate和modalTransitionStyle;
而不仅仅是
- (IBAction) closepressed:(id)sender {
[self.presentingViewController dismissViewControllerAnimated:YES];
}
你会的
- (IBAction) closepressed:(id)sender {
MPCustomModalTransitionDelegate *delegate = [[MPCustomModalTransitionDelegate alloc]init];
self.transitioningDelegate = delegate;
self.modalTransitionStyle = UIModalPresentationCustom;
[self.presentingViewController dismissViewControllerAnimated:YES];
}
这里明显的区别是添加了一个新的MPCustomModalTransitionDelegate类,您需要从视图控制器中重构它.