程序员必知：关于流媒体视频

#import "ViewController.h"

#import

#import

/

/

static const NSString PlayerItemStatusContext;

@interface ViewController ()

@property (nonatomic, strong) AVPlayer player;

@end

@implementation ViewController

- (void)viewDidLoad {

【super viewDidLoad】;

// //1. 根据网址创建AVPlayer

// self.player = 【AVPlayer playerWithURL:【NSURL URLWithString:@""】】;

//

// //2. 创建PlayerLayer

// AVPlayerLayer playerLayer = 【AVPlayerLayer playerLayerWithPlayer:self.player】;

//

// //3. 设置大小

// playerLayer.frame = self.view.bounds;

//

// //4. 添加到layer中

// 【self.view.layer addSublayer:playerLayer】;

//

// //5. 播放

// 【self.player play】;

//

}

- (IBAction)playLocalVideoClick:(id)sender {

NSURL assetURL = 【【NSBundle mainBundle】 URLForResource:@"02开发环境.mp4" withExtension:nil】;

//

// AVAsset asset = 【AVAsset assetWithURL:assetURL】;

//

// AVPlayerItem playerItem = 【AVPlayerItem playerItemWithAsset:asset】;

//

// 【playerItem addObserver:self forKeyPath:@"status" options:0 context:PlayerItemStatusContext】;

//

// self.player = 【AVPlayer playerWithPlayerItem:playerItem】;

self.player = 【AVPlayer playerWithURL:assetURL】;

AVPlayerLayer playerLayer = 【AVPlayerLayer playerLayerWithPlayer:self.player】;

playerLayer.frame = self.view.bounds;

【self.view.layer addSublayer:playerLayer】;

【self.player play】;

}

- (IBAction)playRomoteVideoClick:(id)sender {

//1. AVPlayerItem会创建媒体资源动态视角的数据模型(比如当前播放时间, 实现时间跳转等), 并保存AVPlayer在播放资源时的呈现状态

AVPlayerItem playerItem = 【AVPlayerItem playerItemWithURL:【NSURL URLWithString:@""】】;

【playerItem addObserver:self forKeyPath:@"status" options:0 context:PlayerItemStatusContext】;

self.player = 【AVPlayer playerWithPlayerItem:playerItem】;

AVPlayerLayer playerLayer = 【AVPlayerLayer playerLayerWithPlayer:self.player】;

playerLayer.frame = self.view.bounds;

【self.view.layer addSublayer:playerLayer】;

}

- (void)observeValueForKeyPath:(NSString )keyPath ofObject:(id)object change:(NSDictionary<NSString ,id

{

if (context == PlayerItemStatusContext) {

AVPlayerItem playerItem = (AVPlayerItem )object;

if (playerItem.status == AVPlayerItemStatusReadyToPlay) {

【self.player play】;

}

}

}

- (IBAction)mpVCPlayRomoteClick:(id)sender {

MPMoviePlayerViewController mpvc = 【【MPMoviePlayerViewController alloc】 initWithContentURL:【NSURL URLWithString:@""】】;

【self presentModalViewController:mpvc animated:YES】;

}//代码效果参考：http://www.ezhiqi.com/zx/art_3244.html

- (void)touchesBegan:(NSSet )touches withEvent:(UIEvent )event

{

// 【self.player play】;

}//代码效果参考：http://www.ezhiqi.com/bx/art_963.html

这是一个小demo的实现

#import "ViewController.h"

#import

#import

@interface ViewController ()

@property(nonatomic,strong)AVPlayer player;//播放对象

@property(nonatomic,strong)MPMoviePlayerController *mc;

@end

@implementation ViewController

- (void)viewDidLoad {

【super viewDidLoad】;

// Do any additional setup after loading the view, typically from a nib.

}//代码效果参考：http://www.ezhiqi.com/zx/art_2750.html

/

/

- (IBAction)clik:(id)sender {

//1mpc:

// self.mc=【【MPMoviePlayerController alloc】initWithContentURL:【NSURL URLWithString:@""】】;

// self.mc.view.frame=CGRectMake(0, 200, 375, 200);

// 【self.view addSubview:self.mc.view】;

// 【self.mc play】;

//2mpvc

// MPMoviePlayerViewController mpv=【【MPMoviePlayerViewController alloc】initWithContentURL:【NSURL URLWithString:@""】】;

// 【self presentViewController:mpv animated:YES completion:nil】;

//3Aplayer

//根据网址创建

self.player=【AVPlayer playerWithURL:【NSURL URLWithString:@""】】;

AVPlayerLayer *player=【AVPlayerLayer playerLayerWithPlayer:self.player】;

player.frame=self.view.bounds;

【self.view.layer addSublayer:player】;

//播放

【self.player play】;

}