多媒体播放

NSData *audioData=[NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"1" ofType:@"mp3"]];
    _audio=[[AVAudioPlayer alloc]initWithData:audioData error:nil];
    //音量
    _audio.volume=1;
    //设置播放速率
    _audio.enableRate=YES;
    //1.0正常 0.5减半 2.0两倍
    _audio.rate=1;
    //设置声道
    //-1.0左声道,0.0双声道,1.0右声道
    _audio.pan=0.0;
    //如果音频没有播放,currentTime指从30秒位置开始播放
    //如果音频正在播放,currentTime指调到30秒的位置播放
//currentTime可以理解为当前播放时间,获取播放时间时也是currentTime
    _audio.currentTime=30;
//播放
[_audio play];

 NSURL *url=[NSURL URLWithString:@"http://localhost:8080/downloadSrver/1.mp3"];
        NSURLRequest *request=[NSURLRequest requestWithURL:url];
        NSData *data=(NSData *)[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
        _audio=[[AVAudioPlayer alloc]initWithData:data error:nil];

if (_audio.playing==YES) {
        [_audio pause];
        [button setTitle:@“continue” forState:UIControlStateNormal];
    }
    else
    {
        [_audio play];
        [button setTitle:@"pause" forState:UIControlStateNormal];
    }

[_audio stop];