一烦味、AVPlayer

能播放本地聂使、遠(yuǎn)程的音頻壁拉、視頻文件；基于Layer顯示柏靶，得自己去編寫控制面板弃理。

1. 本地視頻:

#import <AVFoundation/AVFoundation.h>
@interface ViewController ()
@property (nonatomic, strong) AVPlayer *player;
@end

@implementation ViewController
- (void)viewDidLoad {

    [super viewDidLoad];

    // 初始化
    NSURL*url = [[NSBundlemainBundle] URLForResource:@"promo_full.mp4"withExtension:nil];

    self.player = [AVPlayer playerWithURL:url];

    // 設(shè)置播放圖層
    AVPlayerLayer *playerLayer = [AVPlayerLayer  playerLayerWithPlayer:self.player];
playerLayer.frame = self.view.bounds;
    [self.view.layer addSublayer:playerLayer];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    // 開始播放
    [self.player play];
}
@end

2.在線視頻：

#import <AVFoundation/AVFoundation.h>
@interface ViewController ()
@property (nonatomic, strong) AVPlayer *player;
@end

@implementation ViewController
- (void)viewDidLoad {

    [super viewDidLoad];

    // 初始化
    NSURL*url = [NSURLURLWithString:@"http://streams.videolan.org/streams/mp4/Mr_MrsSmith-h264_aac.mp4"];

    self.player = [AVPlayer playerWithURL:url];

     // 設(shè)置播放圖層
   AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
playerLayer.frame = self.view.bounds;
    [self.view.layer addSublayer:playerLayer];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    // 開始播放
   [self.player play];
}
@end

注意：
播放視頻時(shí)需要設(shè)置播放視頻圖層。

二屎蜓、MPMoviePlayerController

1. 能播放本地蚁廓、遠(yuǎn)程的音頻凸郑、視頻文件,YouTobe就是用MPMoviePlayerController實(shí)現(xiàn)的

2. 它繼承自NSObject，自帶播放控制面板（暫停、播放徽鼎、播放進(jìn)度、是否要全屏）

3. MPMoviePlayerController可以播放的視頻格式包括：H.264往枷、MPEG-4等蝌矛；支持的文件擴(kuò)展名包括：avi,mkv,mov,m4v,mp4等

4. 此類定義在了MediaPlayer框架

5. 加載視頻資源(注意，如果url為nil同樣可以加載)
   NSAssert(self.url, @"URL不能為空");
   [[MPMoviePlayerController alloc] initWithContentURL:self.url];

6. 顯示 ：[self.view addSubview:self.moviePlayer.view];
   通過設(shè)置AutoresizingMask屬性可以在橫豎屏轉(zhuǎn)換時(shí)自動調(diào)整視圖大小

7. 播放：[self.moviePlayer play];

8. 全屏 ：[self.moviePlayer setFullscreen:YES animated:YES];

9. MPMoviePlayerController的播放狀態(tài)是通過通知中心監(jiān)聽的荐吵，常用監(jiān)聽通知事件

• 狀態(tài)變化
  MPMoviePlayerPlaybackStateDidChangeNotification

• 播放結(jié)束
  MPMoviePlayerPlaybackDidFinishNotification

• 退出全屏
  MPMoviePlayerDidExitFullscreenNotification

• 截屏完成
  MPMoviePlayerThumbnailImageRequestDidFinishNotification

• 截屏方法
  -requestThumbnailImagesAtTimes:timeOption:

10. 代碼實(shí)現(xiàn)

#import <MediaPlayer/MediaPlayer.h>
@interface ViewController ()
/**
 *  視頻播放器
 */
@property (nonatomic, strong) MPMoviePlayerController *moviePlayer;
@end

@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 創(chuàng)建視頻播放器
    NSURL *url = [[NSBundle mainBundle] URLForResource:@"promo_full.mp4" withExtension:nil];
    // NSURL *url = [NSURL URLWithString:@"http://streams.videolan.org/streams/mp4/Mr_MrsSmith-h264_aac.mp4"];
    self.moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
    
    // 設(shè)置播放顯示視圖
    self.moviePlayer.view.frame = self.view.bounds;
    [self.view addSubview:self.moviePlayer.view];
    
    // 使用autoLayout適配橫豎屏
    // 1.禁用translatesAutoresizingMaskIntoConstraints
    self.moviePlayer.view.translatesAutoresizingMaskIntoConstraints = NO;
    
    // 2.設(shè)置約束
    NSArray *constraintH = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[moviePlayerView]-0-|" options:0 metrics:nil views:@{@"moviePlayerView" :self.moviePlayer.view}];
    NSArray *constraintV = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[moviePlayerView]-0-|" options:0 metrics:nil views:@{@"moviePlayerView" :self.moviePlayer.view}];
    [self.view addConstraints:constraintH];
    [self.view addConstraints:constraintV];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
   // 兩種方式都是直接播放
    // 播放視頻
    [self.moviePlayer play];
  
    // 準(zhǔn)備后直接播放
    // [self.moviePlayer prepareToPlay];
}
@end

三骑冗、MPMoviePlayerViewController

1. 能播放本地、遠(yuǎn)程的音頻先煎、視頻文件
2. 內(nèi)部是封裝了MPMoviePlayerController
3. 播放界面默認(rèn)就是全屏的
4. 如果播放功能比較簡單贼涩，僅僅是簡單地播放遠(yuǎn)程、本地的視頻文件榨婆，建議用這個
5. 此類定義在了MediaPlayer框架
6. 代碼實(shí)現(xiàn)

#import <MediaPlayer/MediaPlayer.h>
@interface ViewController ()
@end

@implementation ViewController
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    // 創(chuàng)建播放控制器
    NSURL*url = [NSURLURLWithString:@"http://streams.videolan.org/streams/mp4/Mr_MrsSmith-h264_aac.mp4"];

    MPMoviePlayerViewController*moviePlayerVc = [[MPMoviePlayerViewControlleralloc] initWithContentURL:url];

    // 播放視頻
    [self  presentMoviePlayerViewControllerAnimated:moviePlayerVc  ];
}
@end

注意：
使用MPMoviePlayerViewController時(shí)創(chuàng)建的視頻播放控制器不需要強(qiáng)引用磁携。