iOS AVAudioPlayer播放音乐

一. AVAudioPlayer：       

　　　　                        　　

　　　　声明音乐控件AVAudioPlayer，必须声明为全局属性变量，否则可能不会播放，AVAudioPlayer只能播放本地音乐 

       //获取音乐文件路径
        NSURL *soundUrl = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:_fileName ofType:@"mp3"]];
        
        if (!_BGMPlayer) {
            
            _asset = [[AVURLAsset alloc] initWithURL:soundUrl options:nil];
            //实例化音乐播放控件
            _BGMPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:_asset.URL error:nil];
        }
        if (_BGMPlayer != nil) {
            //缓冲播放
            _BGMPlayer.delegate = self;
            [_BGMPlayer prepareToPlay];
            _BGMPlayer.numberOfLoops = -1;
            [_BGMPlayer play];
        }else{
            NSLog(@"初始化失败");
        }
    

二. AVURLAsset

　　创建一个由URL标识的代表任何资源的asset对象

　　

 _asset = [[AVURLAsset alloc] initWithURL:soundUrl options:nil];
            //实例化音乐播放控件
            _audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:_asset.URL error:nil];

三. AVAudioPlayerDelegate　

/* audioPlayerBeginInterruption: is called when the audio session has been interrupted while the player was playing. The player will have been paused. */
//产生中断后调用这个函数，通常暂停播放
- (void)audioPlayerBeginInterruption:(AVAudioPlayer *)player
{
    [self.playerpause];
}

/* audioPlayerEndInterruption:withOptions: is called when the audio session interruption has ended and this player had been interrupted while playing. */
/* Currently the only flag is AVAudioSessionInterruptionFlags_ShouldResume. */
//恢复中断后调用这个函数，继续播放
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withOptions:(NSUInteger)flags
{
    [self.playerplay];
}

//解码出错后调用这个函数
- (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer *)player error:(NSError *)error

//播放结束后调用这个函数
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag

四. 参考链接

  http://www.cnblogs.com/QianChia/p/5771149.html

  http://www.jianshu.com/p/cc79c45b4ccf

  http://www.360doc.com/content/15/1214/23/20918780_520470043.shtml

  https://segmentfault.com/a/1190000004049416?_ea=471318