Question

视频文件为http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4 我将它复制到应用程序包中后无法播放，然后运行：怎么了？

-(void)showvideo {
    NSNotificationCenter* center = [NSNotificationCenter defaultCenter];

    [center addObserver:self selector:@selector(mPMoviePlayerLoadStateDidChangeNotification) name:MPMoviePlayerLoadStateDidChangeNotification object:nil];
    [center addObserver:self selector:@selector(readytoplay) name:MPMoviePlayerReadyForDisplayDidChangeNotification object:nil];

    NSBundle* b = NSBundle.mainBundle;
    NSString* res = [b resourcePath];
    NSString* file;
    //  file = @"sr.m4v";
//  file = @"sample_iPod.m4v";
    file = @"big_buck_bunny.mp4";
//  file = @"xxx.mp4";
    NSString* path = [res stringByAppendingPathComponent:file];
    NSFileManager* manager = [NSFileManager defaultManager];
    if ([manager fileExistsAtPath:path]) {
        NSLog(@"file exists!");
    }
    else {
        NSLog(@"file does not exist!");
    }

    NSURL* url = [NSURL URLWithString:path];
    NSLog(@"url: %@", url);

    self.movieplayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
    //  self.movieplayer = [MPMoviePlayerController new];
    self.movieplayer.movieSourceType = MPMovieSourceTypeFile;

    NSLog(@"self.movieplayer: %@, loadState: %d", self.movieplayer, self.movieplayer.loadState);

    [self.movieplayer prepareToPlay];

    NSLog(@"self.movieplayer: %@, loadState: %d", self.movieplayer, self.movieplayer.loadState);
}

-(void)readytoplay {
    NSLog(@"readytoplay");

    [self.movieplayer.view setFrame:self.view.bounds];  // player's frame must match parent's
    [self.view addSubview:self.movieplayer.view];

    NSLog(@"self.movieplayer: %@", self.movieplayer);
    self.movieplayer.fullscreen = YES;
    NSLog(@"self.movieplayer: %@", self.movieplayer);
    [self.movieplayer play];
}

-(void)mPMoviePlayerLoadStateDidChangeNotification {
    NSLog(@"mPMoviePlayerLoadStateDidChangeNotification %@, loadState: %d", self.movieplayer, self.movieplayer.loadState);
}

电影播放器属性：

@property (nonatomic, strong) MPMoviePlayerController* movieplayer;

Answer 1

首先，您无法在运行时修改（追加，添加，删除）应用程序的包。其次，必须使用NSURL方法初始化本地文件的fileURLWithPath。尝试更正此问题，如果无法解决，请尝试观察MPMoviePlayerController的{{1}}更改，并在其loadState准备好播放时，尝试播放该文件。希望这会有所帮助。

修改对不起，我的不好，你没有在运行时更改应用程序包，只是去第二部分。而且，您只需调用loadState

即可获取该文件的网址

Answer 2

您的网址错误。多数民众赞成并没有成功。使用[NSURL fileURLWithPath：path]作为url。它应该工作。

无法使用MPMoviePlayerController播放视频文件

2 个答案: