AVAudioPlayer 变速播放音频

关键代码

NSURL *url = [NSURL fileURLWithPath:@".../.../.../XXX.mp3"];

AVAudioPlayer *player = [[AVAudioPlayer alloc]initWithContentsOfURL:url error:nil];

player.delegate = self;

player.enableRate = YES;

player.rate = 0.5;//0.5是慢速播放一倍，2是快速播放一倍

[player play];