OC-AVAudioPlayer的使用小记

- (void)viewDidLoad {

    [super viewDidLoad];

    

    //设置音乐的后台播放，注意background mode中需要勾选上

    AVAudioSession *session = [AVAudioSession sharedInstance];

    [session setCategory:AVAudioSessionCategoryPlayback error:nil];

}

 
//开始播放
- (IBAction)player:(id)sender {

    [self.player play];

}

 
//暂停播放
- (IBAction)pause:(id)sender {

    [self.player pause];

}

 
//停止播放
- (IBAction)stop:(id)sender {

    [self.player stop];

}

 
//前进5s
- (IBAction)qianJin5s:(id)sender {

    self.player.currentTime += 5;

}

 
//后退5s
- (IBAction)houTui5s:(id)sender {

    self.player.currentTime -= 5;

}

 
//快速播放
- (IBAction)faster:(id)sender {

    self.player.rate = 2;

}

 
//播放一次
- (IBAction)playOnce:(id)sender {

    self.player.numberOfLoops = 0;

}

 
//播放3次
- (IBAction)playThirst:(id)sender {

    self.player.numberOfLoops = 2;

}

 
//循环播放
- (IBAction)playAllTheTime:(id)sender {

    self.player.numberOfLoops = -1;

}

 
//获取一些基础信息
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

    NSLog(@"deviceCurrentTime=%f",self.player.deviceCurrentTime);

    NSLog(@"currentTime=%f",self.player.currentTime);

    NSLog(@"duration=%f", self.player.duration);

    NSLog(@"settings=%@", self.player.settings);

    

}

//听筒播放

- (IBAction)tingTongPlay:(id)sender {

    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:0 error:nil];

}

//扬声器播放

- (IBAction)outSpeakerPlayer:(id)sender {

    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker error:nil];

}

//懒加载 

- (AVAudioPlayer *)player {

    if (!_player) {

        //获取播放的路径 paomo.mp3   2018-11-27 10_36_51 1.wav

        NSURL *path = [[NSBundle mainBundle] URLForResource:@"paomo.mp3" withExtension:nil];

        //根据路径创建播放对象

        AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:path error:nil];

        //如果这个属性不设置的话，那么不能设置倍速播放的功能

        player.enableRate = YES;

        //准备播放

        [player prepareToPlay];

        _player = player;

    }

    return _player;

}