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

这是由.m文件中的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];
}

视频以mp4编码，符合标准，并在iOS上运行。结果是 - here

视频无法启动，按钮“完成”无法正常工作..我无法理解出了什么问题。请帮帮我。

Answer 1

是的，问题是，而不是使用全局属性

@property (nonatomic, strong) MPMoviePlayerController *moviePlayer;

您已在 - （IBAction）Video1Button：（id）发件人中重新声明了MPMoviePlayerController;方法

因此，moviePlayer的生命以 Video1Button 方法的结尾结束。

正确的方式，

- (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];
}

Answer 2

像这样更改你的video1Button方法。

- (IBAction)Video1Button:(id)sender {

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

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

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

    [self.moviePlayerController play];
}

iOS视频无法播放MPMoviePlayer

2 个答案: