播放视频后更改视图

Question

当我单击播放按钮时，我的视频可以工作，并且我知道视图更改的代码可以工作。我的视频播放完毕后，我似乎无法改变视图，不知道出了什么问题。视频播放完毕后，有什么想法可以改变视图吗？

我播放电影的代码

-(IBAction)playMovie:(id)sender {
NSString *movieUrl = [[NSBundle mainBundle] pathForResource:@"Movie_1666" ofType:@"m4v"]; 
playerController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL fileURLWithPath:movieUrl]];
//Smoothe Transition
//[self presentMoviePlayerViewControllerAnimated:playerController];
//Instant Transistion
[self presentModalViewController:playerController animated:NO];
playerController.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
playerController.moviePlayer.scalingMode = MPMovieScalingModeAspectFill;
playerController.moviePlayer.controlStyle = MPMovieControlStyleNone;
[playerController.moviePlayer play];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackFinished:) name:MPMoviePlayerPlaybackDidFinishNotification object:playerController]; }

我更改视图的方法

- (void)playbackFinished:(NSNotification*) notification {
MPMoviePlayerController *playerController = [notification object];
[[NSNotificationCenter defaultCenter] 
 removeObserver:self
 name:MPMoviePlayerPlaybackDidFinishNotification
 object:playerController];

View2 *view2 = [[View2 alloc] initWithNibName:@"View2" bundle:nil];
View2.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:view2 animated:YES]; }

编辑： 我的Notification对象错误并且没有触发我的playbackFinished方法 这个改变解决了这个问题。

- (void)playbackFinished:(NSNotification*) notification {
playerController = [notification object];
[[NSNotificationCenter defaultCenter] 
 removeObserver:self
 name:MPMoviePlayerPlaybackDidFinishNotification
 object:playerController];

我还将其放入我的头文件中，使其成为全局的，以便在我的playbackFinished方法中使用

MPMoviePlayerViewController *playerController;

Answer 1

电影播放完毕后，关闭 playerController 视图（不带动画）。另请检查您是否在主线程中呈现 View2。

编辑：
通过以下方式关闭 playerController

[playerController dismissModalViewControllerAnimated:NO];