http://www.mysjtu.com/page/M0/S963/963538.html
辦法一：
MPMediaQuery *mysongsQuery = [MPMediaQuery songsQuery];
_songsArray = [mysongsQuery items];
for （MPMediaItem *song in _songsArray） {
NSString *songTitle = [song valueForProperty:MPMediaItemPropertyTitle];
NSString *assetUrl = [song valueForProperty:MPMediaItemPropertyAssetURL];
NSLog （＠"％＠ ％＠"， songTitle，assetUrl）;
}
MPMediaQuery *playlistQuery = [MPMediaQuery playlistsQuery];
for （MPMediaPlaylist *playlist in playlistQuery.items）
{
NSString *playlistName = [playlist valueForProperty:MPMediaPlaylistPropertyName];
NSLog （＠"％＠"， playlistName）;
}
MPMediaQuery *albumQuery = [MPMediaQuery albumsQuery];
辦法二：
MPMediaPickerController *vc = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeMusic];
vc.delegate = self;
[self presentViewController:vc animated:YES completion:^{
}];
並實現辦法：
- （void）mediaPicker:（MPMediaPickerController *）mediaPicker didPickMediaItems:（MPMediaItemCollection*）mediaItemCollection
{
MPMediaItem *item = mediaItemCollection.items.firstObject;
NSString *songTitle = [item valueForProperty:MPMediaItemPropertyTitle];
NSURL *assetUrl = [item valueForProperty:MPMediaItemPropertyAssetURL];
NSLog （＠"％＠ ％＠"， songTitle，assetUrl）;
[mediaPicker dismissViewControllerAnimated:YES completion:^{
}];
MPMusicPlayerController* mDRMAudioPlayer = [MPMusicPlayerController applicationMusicPlayer];
[mDRMAudioPlayer setQueueWithItemCollection:mediaItemCollection];
[mDRMAudioPlayer play];
}
- （void）mediaPickerDidCancel:（MPMediaPickerController *）mediaPicker
{
[mediaPicker dismissViewControllerAnimated:YES completion:^{
}];
}