IOS 多媒体加载 加载音频 AVAudioPlayer

 1 NSString *path = [[NSBundle mainBundle] pathForResource:@"胭脂泪" ofType:@"mp3"]; //把音频文件转换成url格式  
 2   
 3 NSURL *urlStr             = [NSURL fileURLWithPath:path];  
 4 AVAudioPlayer * audioPlayer  = [[AVAudioPlayer alloc] initWithContentsOfURL:urlStr error:nil];  
 5 audioPlayer.volume        = 1;            //音量0.0~1.0之间  
 6 audioPlayer.numberOfLoops = -1;           //循环次数   —1为无限循环播放  
 7   
 8 [audioPlayer play];                      //音乐播放  
 9   
10 audioPlayer.currentTime = 15.0;  
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12   
13   
14 NSUInteger channels = audioPlayer.numberOfChannels; //声道数（只读）  
15 NSTimeInterval duration = audioPlayer.duration;  //采样持续时间  
16 audioPlayer.meteringEnabled = YES; //开启仪表技术功能  
17 [audioPlayer updateMeters];  //更新仪表读数  
18   
19 [audioPlayer prepareToPlay]; //分配播放所需的资源并将其加入内部播放列队