使用他的路径获取音频文件的信息-Objective-C iOS

Question

实际上，我正在用这部分简单的代码播放歌曲：

    NSURL *url=[NSURL fileURLWithPath:clickedPath];
    AVPlayer *player = [AVPlayer playerWithURL:url];


    AVPlayerViewController *controller = [[AVPlayerViewController alloc] init];
    [self presentViewController:controller animated:YES completion:nil];
    controller.player = player;
    [player play];

我想做的是使用自定义视图显示歌曲的信息（艺术家，专辑名称和艺术品等），该视图与contentOverlayView的AVPlayerViewController属性一起显示。 我在这里搜索了所有内容，但没有发现对我的情况有用的东西（找到了MPMediaPlayer解决方案还是无法解决）。

你可以帮我吗？ 我愿意测试您的建议并进行讨论！

提前致谢

Answer 1

NSString *path = [[NSBundle mainBundle] pathForResource:@"youraudiomp3filename" ofType:@"mp3"];

NSURL *url=[NSURL fileURLWithPath:path];
AVPlayer *player = [AVPlayer playerWithURL:url];

AVAsset *asset = [AVURLAsset URLAssetWithURL:url options:nil];

NSArray *metadata = [asset commonMetadata];
NSString *title;
NSString *artist;
NSString *albumName;
UIImageView *imageView;
for (AVMetadataItem *item in metadata) {
    if ([[item commonKey] isEqualToString:@"title"]) {
        title = (NSString *)[item value];
    }

    if ([[item commonKey] isEqualToString:@"artist"]) {
        artist = (NSString *)[item value];
    }

    if ([[item commonKey] isEqualToString:@"albumName"]) {
        albumName = (NSString *)[item value];
    }

    if ([[item commonKey] isEqualToString:@"artwork"]) {
        NSData *data = [(NSDictionary *)[item value] objectForKey:@"data"];
        UIImage *img = [UIImage imageWithData:data] ;
        imageView.image = img;
        continue;
    }
}

然后您可以将资产设置为AVPlayerViewController的播放器，进行播放和演示。

Answer 2

感谢@LA的帮助，我成功地通过以下方式获得了所有歌曲的信息：

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];


        NSURL *url=[NSURL fileURLWithPath:clickedPath];
        NSLog(@"url : %@", url);
        avPlayer = [AVPlayer playerWithURL:url];


        AVAsset *asset = [AVURLAsset URLAssetWithURL:url options:nil];

        NSArray *metadata = [asset commonMetadata];
        NSString *songTitle;
        NSString *artist;
        NSString *albumName;
        UIImageView *albumImageView = [[UIImageView alloc] init];


        for (AVMetadataItem *item in metadata) {

            if ([[item commonKey] isEqualToString:@"title"]) {

                songTitle = (NSString *)[item value];
                NSLog(@"song title : %@", songTitle);

            }

            if ([[item commonKey] isEqualToString:@"albumName"]) {

                albumName = (NSString *)[item value];
                NSLog(@"album name : %@", albumName);

            }

            if ([[item commonKey] isEqualToString:@"artist"]) {

                artist = (NSString *)[item value];
                NSLog(@"song artist : %@", artist);

            }

            if ([[item commonKey] isEqualToString:@"artwork"]) {

                NSData *data = [item dataValue];
                UIImage *img = [UIImage imageWithData:data] ;
                albumImageView.image = img;
                [albumImageView setTranslatesAutoresizingMaskIntoConstraints:NO];
                continue;

            }
        }


        AVPlayerViewController *controller = [[AVPlayerViewController alloc] init];
        [self presentViewController:controller animated:YES completion:nil];
        [controller.contentOverlayView addSubview:albumImageView];
        controller.player = avPlayer;
        [avPlayer play];