AVAudioPlayer播放音频

创建播放器：

static AVAudioPlayer* player;
+ (void)playAudio:(NSString *)audioFile{
    //如果播放器也存在则停止播放并释放资源。
    if(player){
        if(player.isPlaying)
            [player stop];
        
        [player release];
    }    
    
    NSURL* url = [[NSURL alloc] initFileURLWithPath:@"a.mp3"];
    player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    player.numberOfLoops = 1; //循环数
    player.volume = 1.0f; //音量0.0~1.0之间
    player.currentTime = 15.0;//可以指定从任意位置开始播放
    [player prepareToPlay];  //分配播放所需的资源，并将其加入内部播放队列 
    [player play];
    [url release];
}

事件：

player.delegate = self;  
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer*)player successfully:(BOOL)flag{  
    //播放结束时执行的动作  
}  
- (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer*)player error:(NSError *)error{  
    //解码错误执行的动作  
}  
- (void)audioPlayerBeginInteruption:(AVAudioPlayer*)player{  
    //处理中断的代码  
}  
- (void)audioPlayerEndInteruption:(AVAudioPlayer*)player{  
    //处理中断结束的代码  
}