IOS 播放视频（MPMoviePlayerController、MPMoviePlayerViewController）

● iOS提供了叫 做MPMoviePlayerController、MPMoviePlayerViewController的两个 类,可以用来轻松播放视频

 ➢ YouTobe就是用MPMoviePlayerController实现的 ➢ MPMoviePlayerViewController只能全屏播放视频

● 上述两个类都定义在了MediaPlayer框架中

 

 

 

MPMoviePlayerController-01-加载资源

 // 加载视频资源
NSString *urlString = [[NSBundle mainBundle]

pathForResource:@"sample_iTunes" ofType:@"mov"];

NSURL *url = [NSURL fileURLWithPath:urlString];

// 创建播放器

_player = [[MPMoviePlayerController alloc]
initWithContentURL:url];

// 加载视频资源
NSString *urlString = [[NSBundle mainBundle] pathForResource:@"sample_iTunes" ofType:@"mov"];

NSURL *url = [NSURL fileURLWithPath:urlString];

// 创建播放器

_player = [[MPMoviePlayerController alloc]
initWithContentURL:url];

MPMoviePlayerController-02-显示

// 设置尺寸
_player.view.frame = self.view.bounds;

_player.view.autoresizingMask =UIViewAutoresizingFlexibleWidth |

UIViewAutoresizingFlexibleHeight;

// 添加到控制器的view上
[self.view addSubview:_player.view]; // 播放
[_player play];

MPMoviePlayerController-03-添加通知监听

// 监听播放状态的改变

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(videoStateChange)

name:MPMoviePlayerPlaybackStateDidChangeNotification object:_player];

// 监听播放器结束全屏

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(exitFullscreen)
name:MPMoviePlayerDidExitFullscreenNotification object:_player];

MPMoviePlayerController其他属性

● 是否要自动播放
@property(nonatomic) BOOL shouldAutoplay;

● 全屏显示
@property(nonatomic, getter=isFullscreen) BOOL

fullscreen;
- (void)setFullscreen:(BOOL)fullscreen animated:

(BOOL)animated;

● 截取视频中的图片

- (void)requestThumbnailImagesAtTimes:(NSArray
*)playbackTimes timeOption:(MPMovieTimeOption)option;

 

MPMoviePlayerViewController

● MPMoviePlayerViewController继承自UIViewController,它内部封装了一 个MPMoviePlayerController

● MPMoviePlayerViewController只能全屏播放

● 简单使用:

MPMoviePlayerViewController *play =
[[MPMoviePlayerViewController alloc] initWithContentURL:url];

其他

● 音频处理
➢ 依赖的框架:AVFoundation、AudioToolbox框架

➢ 播放长音乐:AVAudioPlayer
➢ 播放短音效:加载音频文件生成SystemSoundID

➢ 录音:AVAudioRecord

 

 ● 较为底层、高级的音频视频处理

➢ CoreAudio、CoreVideo框架