iOS xcode7 beta 播放英语

NSString *path=[[NSBundle
mainBundle] pathForResource:@"Go.mp3"
ofType:nil];

NSURL *url=[NSURL
fileURLWithPath:path];

self.play=[[AVAudioPlayer
alloc] initWithContentsOfURL:url
error:nil];

if ([self.play
isPlaying]) {

return;
}
[self.play
setVolume:100];

AVAudioSession *session=[[AVAudioSession
alloc]
init];

[session setCategory:AVAudioSessionCategoryPlayback
error:nil];
[session
setActive:YES
error:nil];
[self.play
play];