扫描IPHONE本土音乐文件，获得音乐名，歌手名代码示例

//扫描本地音乐文件，返回艺术家列表 需要库MediaPlayer.framework-(NSArray*) findArtistList {    NSMutableArray *artistList = [[NSMutableArray alloc]init];    MPMediaQuery *listQuery = [MPMediaQuery playlistsQuery];//播放列表    NSArray *playlist = [listQuery collections];//播放列表数组    for (MPMediaPlaylist * list in playlist) {        NSArray *songs = [list items];//歌曲数组        for (MPMediaItem *song in songs) {            NSString *title =[song valueForProperty:MPMediaItemPropertyTitle];//歌曲名            //歌手名            NSString *artist =[[song valueForProperty:MPMediaItemPropertyArtist] uppercaseString];            if(artist!=nil&&![artistList containsObject:artist]){                [artistList addObject:artist];            }        }    }    return artistList;}