ios - MPMoviePlayerController:不播放视频

Question

我正在尝试使用 MPMoviePlayerController 播放本地保存的视频，但它不起作用。

这是我的来源:

self.moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
[self.moviePlayer prepareToPlay];

CGRect frame = self.movieView.frame;
frame.origin = CGPointZero;

self.moviePlayer.view.frame = frame;

self.moviePlayer.allowsAirPlay         = NO;
self.moviePlayer.shouldAutoplay        = NO;
self.moviePlayer.movieSourceType       = MPMovieSourceTypeFile;
self.moviePlayer.scalingMode           = MPMovieScalingModeAspectFit;
self.moviePlayer.controlStyle          = MPMovieControlStyleEmbedded;
self.moviePlayer.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;

[self.movieView addSubview:self.moviePlayer.view];

当我有一个像“assets-library://asset/asset.MOV?id=2C7D89F6-2211-4920-A842-30D773B075D6&ext=MOV”这样的 URL 时，它确实工作但是当我有像“file:///var/mobile/Media/DCIM/101APPLE/IMG_1454.mp4”这样的 URL 不起作用。

我正在使用下面的代码获取用户最新的视频并在播放器中播放:

- (void)mostRecentVideo:(void (^)(NSURL *url))completion
{
PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
fetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]];

PHFetchResult *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeVideo options:fetchOptions];
PHAsset *lastAsset = [fetchResult lastObject];

PHVideoRequestOptions *options = [PHVideoRequestOptions new];
options.deliveryMode = PHVideoRequestOptionsDeliveryModeMediumQualityFormat;

[[PHImageManager defaultManager] requestAVAssetForVideo:lastAsset options:options resultHandler:^(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info) {
    if ([asset isKindOfClass:[AVURLAsset class]])
        completion(((AVURLAsset *)asset).URL);
}];
}

Answer 1

同样的代码对我有用，我是这样使用的。由于获取 url 是一个异步操作，因此必须在主队列上更新 UI。只需将代码放入 viewDidAppear 中，然后重试。

[self mostRecentVideo:^(NSURL *url){
    NSLog(@"did play!, url is %@",url);
    self.moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
    [self.moviePlayer prepareToPlay];

    CGRect frame = self.view.frame;
    frame.origin = CGPointZero;

    self.moviePlayer.view.frame = frame;

    self.moviePlayer.allowsAirPlay         = NO;
    self.moviePlayer.shouldAutoplay        = NO;
    self.moviePlayer.movieSourceType       = MPMovieSourceTypeFile;
    self.moviePlayer.scalingMode           = MPMovieScalingModeAspectFit;
    self.moviePlayer.controlStyle          = MPMovieControlStyleEmbedded;
    self.moviePlayer.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;

    dispatch_async(dispatch_get_main_queue(), ^{
        [self.view addSubview:self.moviePlayer.view];
    });
    [self.moviePlayer play];
}];