ios - iOS iPod API - 获取实际歌曲文件

Question

在我的应用程序中，我想展示媒体选择器，让用户选择一首歌曲，然后获取它的实际 MP3（或任何其他格式，只要它可由其他 iOS 设备播放）文件。

怎么可能实现？我如何才能用歌曲文件实际创建一个对象？

Answer 1

我不知道为什么每个人都说这么多关于被应用商店拒绝的废话。我将为您简要介绍如何开始。

- 呈现媒体选择器以打开用户的 iPod：

MPMediaPickerController *pickerController = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeMusic];
pickerController.prompt = NSLocalizedString(@"Choose Song", NULL);
pickerController.allowsPickingMultipleItems = NO;
pickerController.delegate = self;
[self presentViewController:pickerController animated:YES completion:nil];
[pickerController release];

- 等到用户选择一首歌曲并在 mediaPicker 委托中获取回调：

   - (void)mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection
{
    MPMediaItem *theChosenSong = [[mediaItemCollection items]objectAtIndex:0];
    NSString *songTitle = [theChosenSong valueForProperty:MPMediaItemPropertyTitle];
    NSString *artist = [theChosenSong valueForProperty:MPMediaItemPropertyArtist];

   //then just get the assetURL
    NSURL *assetURL = [theChosenSong valueForProperty:MPMediaItemPropertyAssetURL];
    AVURLAsset  *songAsset  = [AVURLAsset URLAssetWithURL:assetURL options:nil];

  //Now that you have this, either just write the asset (or part of) to disk, access the asset directly, send the written asset to another device etc

}