AVAudioPlayer Doesn't play the songs inside the folders?

问题

I used this code to play songs it is not playing the songs inside the folders or folders of folders except the Documents directory.

NSString *songname=[NSString stringWithFormat:@"%@",songArray[songIndex]];
NSLog(@"songname:%@",songname);

NSString* saveFileName = songname;

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:saveFileName];
NSURL *url = [[NSURL alloc] initFileURLWithPath: path];
self.audioPlayer=[[AVAudioPlayer alloc] initWithContentsOfURL:url error:NULL];

回答1:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"github.mp4"];
NSURL *url1 = [[NSURL alloc] initFileURLWithPath: path];
avPlayer = [AVPlayer playerWithURL:url1] ;
[self.avplayer play];

来源：https://stackoverflow.com/questions/17720571/avaudioplayer-doesnt-play-the-songs-inside-the-folders