音频，视频项目

一、音频播放
1.音效播放（短时间的音频文件）
1> AudioServicesCreateSystemSoundID
2> AudioServicesPlaySystemSound

2.音乐播放（长时间的音频文件）
1> AVAudioPlayer
只能播放本地的音频文件
>MPMusicPlayerController
- (void)viewDidLoad {
    [super viewDidLoad];
    
    VideoPlayView *viewPlayView = [VideoPlayView videoPlayView];
    viewPlayView.frame = self.imageView.bounds;
    [self.imageView addSubview:viewPlayView];
    viewPlayView.delegate = self;
    self.playView = viewPlayView;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    AVPlayerItem *item = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"xxxxxxxxxxxx"]];
    [self.playView setPlayerItem:item];
}



2> AVPlayer
能播放本地、远程的音频、视频文件
基于Layer显示，得自己去编写控制面板
 - (AVPlayer *)player
{
    if (_player == nil) {
        // 1.获取URL(远程/本地)

        NSURL *url = [NSURL URLWithString:@"xxxxxxxxxxxxxx"];
        
        // 2.创建AVPlayerItem
        AVPlayerItem *item = [AVPlayerItem playerItemWithURL:url];
        
        // 3.创建AVPlayer
        _player = [AVPlayer playerWithPlayerItem:item];
        
        // 4.添加AVPlayerLayer
        AVPlayerLayer *layer = [AVPlayerLayer playerLayerWithPlayer:self.player];
        layer.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.width);
        [self.view.layer addSublayer:layer];
    }
    return _player;
}
ps:AVPlayer用于可以通过设置代理拦截发送请求，做到边缓存边播放功能，具体实现回头po上源代码。

3> MPMoviePlayerController
能播放本地、远程的音频、视频文件
自带播放控制面板（暂停、播放、播放进度、是否要全屏）
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self.playerController play];
}

#pragma mark - 懒加载代码
- (MPMoviePlayerController *)playerController
{
    if (_playerController == nil) {
        // 1.获取视频的URL
        NSURL *url = [NSURL URLWithString:@"xxxxxxxxxxx"];
        
        // 2.创建控制器
        _playerController = [[MPMoviePlayerController alloc] initWithContentURL:url];
        
        // 3.设置控制器的View的位置
        _playerController.view.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.width );
        
        // 4.将View添加到控制器上
        [self.view addSubview:_playerController.view];
        
        // 5.设置属性
        _playerController.controlStyle = MPMovieControlStyleNone;
    }
    return _playerController;
}


4> MPMoviePlayerViewController
能播放本地、远程的音频、视频文件
内部是封装了MPMoviePlayerController
播放界面默认就是全屏的
如果播放功能比较简单，仅仅是简单地播放远程、本地的视频文件，建议用这个

 

- (IBAction)play {
    [self presentMoviePlayerViewControllerAnimated:self.playerVc];
}

#pragma mark - 懒加载
- (MPMoviePlayerViewController *)playerVc
{
    if (_playerVc == nil) {
        NSURL *url = [NSURL URLWithString:@"http://v1.mukewang.com/a45016f4-08d6-4277-abe6-bcfd5244c201/L.mp4"];
        
        _playerVc = [[MPMoviePlayerViewController alloc] initWithContentURL:url];;
    }
    return _playerVc;
}