当我选择UITableViewCell时播放音乐

Question

我可以在UITableView上显示音乐库。

songsArray = [[NSMutableArray alloc]init]; 
MPMediaQuery *playlistQuery = [[MPMediaQuery alloc]init]; 
[playlistQuery setGroupingType:MPMediaGroupingTitle]; 
songArray = [playlistQuery items]; 
for (MPMediaItem *song in songArray) { 
    NSString *songTitle = [song valueForProperty: MPMediaItemPropertyTitle];   
    [songsArray addObject:songTitle]; 
} 
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:    (NSIndexPath *)indexPath { 
    cell.textLabel.text = [songsArray objectAtIndex:row]; 
[cell.textLabel setTextColor:[UIColor whiteColor]]; 

但是，当我选择的UITableView细胞不能播放音乐。

NSUInteger row = indexPath.row; 

NSString *selectedSong = [songsArray objectAtIndex:row]; 
MPMusicPlayerController *appPlayer = [MPMusicPlayerController iPodMusicPlayer]; 

[appPlayer setQueueWithQuery:selectedSong]; 

[appPlayer play]; 

}

谁能帮我？

Answer 1

阿我看到的问题：

移动此代码：

NSUInteger row = indexPath.row; 
NSString *selectedSong = [songsArray objectAtIndex:row]; 
MPMusicPlayerController *appPlayer = [MPMusicPlayerController iPodMusicPlayer]; 
[appPlayer setQueueWithQuery:selectedSong]; 
[appPlayer play]; 

到的UITableViewDelegate协议方法 'didSelectRowAtIndexPath方法' 是这样的：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    NSUInteger row = indexPath.row; 
    NSString *selectedSong = [songsArray objectAtIndex:row]; 
    MPMusicPlayerController *appPlayer = [MPMusicPlayerController iPodMusicPlayer]; 
    [appPlayer setQueueWithQuery:selectedSong]; 
    [appPlayer play]; 
} 

编辑

文档：

• UITableView Class Reference
• UITableViewDelegate Protocol Reference
• UITableViewDataSource Protocol Reference
• MPMusicPlayerController Class Reference
• MPMediaQuery Class Reference
• Using the iPod Library/iPod Library Access Programming Guide