一些 avaudioPlayer 参数，

1，设定音量0.0~1.0

[myPlayer setVolume:0.5];

2，设定播放次数-1为无限循环
[myPlayer setNumberOfLoops:0];

3，设定播放位置（重头播放）
[myPlayer setCurrentTime:0.0];

4，播放
[myPlayer play];

5，暂停
[myPlayer pause];

6，停止
[myPlayer stop];

7，音乐总长度

[myPlayer duration]

8，目前播放位置

[myPlayer currentTime]

9，声道数目

[myPlayer numberOfChannels]

10，向后跳转一秒

NSTimeInterval currentTime = [myPlayer currentTime];
[myPlayer setCurrentTime:currentTime + 1];

 -----------delegate，

1，- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
    NSLog(@"播放完毕");
}

2，//电话中断
- (void)audioPlayerBeginInterruption:(AVAudioPlayer *)player {
    NSLog(@"被中断");
}

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withOptions:(NSUInteger)flags {
    NSLog(@"从中断中恢复");
}

3，取得播放档案的位置

NSURL* url = [[NSURL alloc] initFileURLWithPath:[[NSBundle mainBundle] pathForResource:@"FileName" ofType:@"mp3"]];

4，与音乐档案做链接
NSError* error = nil;
myPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];

if (!url || error) {
    //错误处理程序
}
5，档案存放于网络
6，取得播放档案的位置 
NSURL *url = [NSURL URLWithString:@"http://FileName.mp3"];
NSData *myNetworkData = [NSData dataWithContentsOfURL:url];

7，与音乐档案做链接
NSError* error = nil;
myPlayer = [[AVAudioPlayer alloc] initWithData:myNetworkData error:&error];

if (!url || error) {
    //错误处理程序
}

 self.player = [self.player initWithContentsOfURL:[NSURL URLWithString:[VoiceRecorderBaseVC getPathByFileName:fileName ofType:@"wav"]] error:nil];

每次生成一遍，都进行了重新的初始化，

比如：self.player.isPlaying,

1,异步perform selector,

2,start,notend = playing，代理看是否播放完毕，