iOS 视频无法使用 MPMoviePlayer 播放

Question

我正在为我的应用制作视频播放器模块。

这是我的 .h 文件:

#import <UIKit/UIKit.h>
#import <MediaPlayer/MediaPlayer.h>

@interface SpanishViewController : UIViewController
- (IBAction)Video1Button:(id)sender;

@property (nonatomic, strong) MPMoviePlayerController *moviePlayer;


@end

这是.m文件中按钮执行的事件代码:

- (IBAction)Video1Button:(id)sender {

    NSString *filepath   =   [[NSBundle mainBundle] pathForResource:@"01" ofType:@"mp4"];
    NSURL    *fileURL    =   [NSURL fileURLWithPath:filepath];
    MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlaybackComplete:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:moviePlayerController];

    [self.view addSubview:moviePlayerController.view];
    moviePlayerController.fullscreen = YES;

    [moviePlayerController play];
}

按照标准在 mp4 中编码并在 iOS 上运行的视频。 结果是 - here

视频不启动，“完成”按钮不起作用..我不明白哪里出了问题。 请帮助我。

Answer 1

是的，问题是， 而不是使用全局属性

@property (nonatomic, strong) MPMoviePlayerController *moviePlayer;

您已在您的 - (IBAction)Video1Button:(id)sender; 中重新声明了一个 MPMoviePlayerController；方法。

因此，moviePlayer 的生命随着 Video1Button 方法的结束而结束。

正确的方法，

- (IBAction)Video1Button:(id)sender {

    NSString *filepath   =   [[NSBundle mainBundle] pathForResource:@"01" ofType:@"mp4"];
    NSURL    *fileURL    =   [NSURL fileURLWithPath:filepath];
    _moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlaybackComplete:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:self.moviePlayerController];

    [self.view addSubview:_moviePlayerController.view];
    _moviePlayerController.fullscreen = YES;

    [_moviePlayerController play];
}