音频播放，解决可暂停功能。参考资料

http://www.cnblogs.com/kenshincui/p/4186022.html#avPlayer

系统自带

#import <AVFoundation/AVFoundation.h>

1. AVAudioPlayer *player;

2.  player = [[AVAudioPlayer alloc]initWithContentsOfURL:_messageFrame.message.voicePath error:nil];

    player.delegate = self;

3.  [player prepareToPlay]; //准备播放

    [player play];//播放

    [player stop];//停止播放

4. - (void)audioPlayerDidFinishPlaying:(AVAudioPlayer*)player successfully:(BOOL)flag{

    

    NSLog(@"test////");

}