将MPMediaItems与AVAudioPlayer一起使用 [英] Using MPMediaItems with AVAudioPlayer

问题描述

是否可以使用MPMediaPickerController选择媒体项目，然后将它们加载到AVAudioPlayer对象中？

Is it possible to pick media items using MPMediaPickerController and then load them into an AVAudioPlayer object?

推荐答案

如果 MPMusicPlayerController 无法满足您的需求，您可以将音频复制到本地软件包，这样您就可以使用 AVAudioPlayer 。

If MPMusicPlayerController doesn't meet your needs, you can copy the audio to your local bundle so you can use AVAudioPlayer.

编辑

您基本上有三个选项可以播放来自用户iPod的音频library： MPMediaPlayer ， AVPlayer 和 AVAudioPlayer 。

You basically have three options for playing audio from the user's iPod library: MPMediaPlayer, AVPlayer and AVAudioPlayer.

以下是 MPMediaPlayer 和 AVPlayer 的示例：

- (void) mediaPicker: (MPMediaPickerController *) mediaPicker
   didPickMediaItems: (MPMediaItemCollection *) collection {


    MPMediaItem *item = [[collection items] objectAtIndex:0];
    NSURL *url = [item valueForProperty:MPMediaItemPropertyAssetURL];

    [self dismissModalViewControllerAnimated: YES];

    // Play the item using MPMusicPlayer

    MPMusicPlayerController* appMusicPlayer = [MPMusicPlayerController applicationMusicPlayer];

    [appMusicPlayer setQueueWithItemCollection:collection];
    [appMusicPlayer play];


    // Play the item using AVPlayer

    AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithURL:url];
    AVPlayer *player = [[AVPlayer alloc] initWithPlayerItem:playerItem];
    [player play];  

}

如果你需要使用 AVAudioPlayer 由于某种原因，或者您需要访问音频文件的实际音频数据，您必须先将音频文件复制到应用程序的目录中，然后在那里使用它。 AVAsset + AVPlayer 东西最接近 ALAsset 如果您习惯使用照片和视频。

If you need to use AVAudioPlayer for some reason, or you need access to the audio file's actual audio data, you have to first copy the audio file to your app's directory and then work with it there. The AVAsset + AVPlayer stuff is the closest analogy to ALAsset if you're used to working with photos and videos.

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