我正在尝试制作自定义演示动画,但VC是MPMoviePlayerViewController
。我正在学习本教程:
当我出示MPMoviePlayerViewController
时,一切都是对的。
但是当我解雇它时,只需要方法:
- (id <UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed
没有被叫,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, 0),fromViewController.view.frame.size};
[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
fromViewController.view.frame = finalFrame;
} completion:^(BOOL finished) {
[transitionContext completeTransition:YES];
}];
}
}
我尝试过使用我开发的视图控制器,效果很好,应该是MPMoviePlayerViewController
吗?
答案 0 :(得分:0)
我能够在解雇时正确设置动画的方式是在调用transitioningDelegate
之前重新设置modalTransitionStyle
和[presentingViewController dismissViewControllerAnimated:YES];
所以而不仅仅是
- (IBAction) closePressed:(id)sender {
[self.presentingViewController dismissViewControllerAnimated:YES];
}
你会做
- (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。