iOS中视频播放的基本方法总结

第一步:引用MediaPlayer框架，声明视图控制器属性PlayerController#import <mediaplayer mediaplayer.h>@property(nonatomic,strong)MPMoviePlayerController *playerController;

//第二步：获取视频路径，创建播放器//本地视频路径NSString* localFilePath=[[NSBundle mainBundle]pathForResource:@"不能说的秘密" ofType:@"mp4"];NSURL *localVideoUrl = [NSURL fileURLWithPath:localFilePath];//网络视频路径NSString *webVideoPath = @"http://api.junqingguanchashi.net/yunpan/bd/c.php?vid=/junqing/1115.mp4";NSURL *webVideoUrl = [NSURL URLWithString:webVideoPath];self.playerController =[[MPMoviePlayerController alloc]initWithContentURL:webVideoUrl];

//第三步：设置Frame将播放器View添加到视图控制器View上self.playerController.view.frame = CGRectMake(0, 10, kDeviceWidth, 300);[self.view addSubview: self.playerController.view];

//第四步：设置播放器属性//设置控制面板风格:无，嵌入，全屏，默认self.playerController.controlStyle = MPMovieControlStyleDefault;//设置是否自动播放(默认为YES）self.playerController.shouldAutoplay = NO;//设置播放器显示模式，类似于图片的处理，设置Fill有可能造成部分区域被裁剪self.playerController.scalingMode = MPMovieScalingModeAspectFit;//设置重复模式self.playerController.repeatMode = MPMovieRepeatModeOne;

//第五步：播放视频//播放前的准备，会中断当前正在活跃的音频会话[ self.playerController prepareToPlay];//播放视频，设置了自动播放之后可以不调用此方法//[ self.playerController play];

//第六步：在退出界面的时候，关闭播放器，移除通知- (void)dealloc{ //当前视图控制器pop之后并不会关闭播放，需要手动关闭 [self.playerController stop]; self.playerController = nil; //移除播放器相关的通知 [[NSNotificationCenter defaultCenter] removeObserver:self];}

//关于通知的使用(还有很多通知可以监听，可查看SDK)NSNotificationCenter *notificaionCenter = [NSNotificationCenter defaultCenter];//监听播放器状态的变化[notificaionCenter addObserver:self selector:@selector(playerStateChanged:) name:MPMoviePlayerPlaybackStateDidChangeNotification object:nil];//监听播放完成[notificaionCenter addObserver:self selector:@selector(playerFinished) name:MPMoviePlayerPlaybackDidFinishNotification object:nil];//监听切换到全屏[notificaionCenter addObserver:self selector:@selector(palyerChangeFullScreen) name:MPMoviePlayerDidEnterFullscreenNotification object:nil];//监听截屏操作完成[notificaionCenter addObserver:self selector:@selector(playerCaptureFinished:) name:MPMoviePlayerThumbnailImageRequestDidFinishNotification object:nil];

#pragma mark - 监听通知的响应方法//播放状态变化，注意播放完成时的状态是暂停- (void)playerStateChanged:(NSNotification *)notificaion{ switch (self.playerController.playbackState) { case MPMoviePlaybackStateStopped:{ NSLog(@"播放停止"); break; } case MPMoviePlaybackStatePlaying:{ NSLog(@"播放器正在播放"); break; } case MPMoviePlaybackStatePaused:{ NSLog(@"播放器暂停"); break; } case MPMoviePlaybackStateInterrupted:{ NSLog(@"播放器中断"); break; } case MPMoviePlaybackStateSeekingForward:{ NSLog(@"播放器快进"); break; } case MPMoviePlaybackStateSeekingBackward:{ NSLog(@"播放器快退"); break; } default: break; }}//视频播放结束- (void)playerFinished{ NSLog(@"playerFinished：播放结束");}//播放器切换到了全屏- (void)palyerChangeFullScreen{ NSLog(@"palyerChangeFullScreen：播放器进入全屏");}//播放器截屏结束- (void)playerCaptureFinished:(NSNotification *)notification{ //获取并显示截图 UIImage *image=notification.userInfo[MPMoviePlayerThumbnailImageKey]; self.captureImgView.image = image;}

//添加一个按钮，点击开始截屏_captureBtn = [[UIButton alloc] initWithFrame:CGRectMake(30, CGRectGetMaxY(self.playerController.view.frame) + 30, kDeviceWidth - 30 * 2, 50)];_captureBtn.backgroundColor = [UIColor purpleColor];[_captureBtn setTitle:@"截图当前屏幕" forState: UIControlStateNormal];[_captureBtn addTarget:self action:@selector(captureCurrentScreenImg) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:_captureBtn];//添加一个ImgView 显示截屏后的图片_captureImgView = [[UIImageView alloc] initWithFrame:CGRectMake((kDeviceWidth - 150)/2, CGRectGetMaxY(_captureBtn.frame) + 20, 150, 150)]; _captureImgView.contentMode = UIViewContentModeScaleAspectFit;_captureImgView.backgroundColor = [UIColor grayColor];[self.view addSubview:_captureImgView];

//截取当前屏幕- (void)captureCurrentScreenImg{ [self.playerController requestThumbnailImagesAtTimes:@[@(self.playerController.currentPlaybackTime)] timeOption:MPMovieTimeOptionNearestKeyFrame];}

//监听通知：播放器截屏结束，得到图片并显示截图- (void)playerCaptureFinished:(NSNotification *)notification{ UIImage *image=notification.userInfo[MPMoviePlayerThumbnailImageKey]; self.captureImgView.image = image;}

//第一步:获取视频路径//本地视频NSString* localFilePath=[[NSBundle mainBundle]pathForResource:@"不能说的秘密" ofType:@"mp4"];NSURL *localVideoUrl = [NSURL fileURLWithPath:localFilePath];//在线视频//NSString *webVideoPath = @"http://api.junqingguanchashi.net/yunpan/bd/c.php?vid=/junqing/1115.mp4";//NSURL *webVideoUrl = [NSURL URLWithString:webVideoPath];//第二步:创建视频播放器MPMoviePlayerViewController *playerViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:localVideoUrl];//第三步:设置播放器属性//通过moviePlayer属性设置播放器属性(与MPMoviePlayerController类似)playerViewController.moviePlayer.scalingMode = MPMovieScalingModeFill;//第四步:跳转视频播放界面[self presentViewController:playerViewController animated:YES completion:nil];

//第一步:引用AVFoundation框架，添加播放器属性#import <AVFoundation/AVFoundation.h>@property (nonatomic,strong)AVPlayer *player;//播放器对象@property (nonatomic,strong)AVPlayerItem *currentPlayerItem;

//第二步:获取播放地址URL//本地视频路径NSString* localFilePath=[[NSBundle mainBundle]pathForResource:@"不能说的秘密" ofType:@"mp4"];NSURL *localVideoUrl = [NSURL fileURLWithPath:localFilePath];//网络视频路径NSString *webVideoPath = @"http://api.junqingguanchashi.net/yunpan/bd/c.php?vid=/junqing/1129.mp4";NSURL *webVideoUrl = [NSURL URLWithString:webVideoPath];

//第三步:创建播放器(四种方法)//如果使用URL创建的方式会默认为AVPlayer创建一个AVPlayerItem//self.player = [AVPlayer playerWithURL:localVideoUrl];//self.player = [[AVPlayer alloc] initWithURL:localVideoUrl];//self.player = [AVPlayer playerWithPlayerItem:playerItem];AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithURL:webVideoUrl];self.currentPlayerItem = playerItem;self.player = [[AVPlayer alloc] initWithPlayerItem:playerItem];

//第四步:创建显示视频的AVPlayerLayer,设置视频显示属性，并添加视频图层//contentView是一个普通View,用于放置视频视图/* AVLayerVideoGravityResizeAspectFill等比例铺满，宽或高有可能出屏幕 AVLayerVideoGravityResizeAspect 等比例 默认 AVLayerVideoGravityResize 完全适应宽高*/AVPlayerLayer *avLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];avLayer.videoGravity = AVLayerVideoGravityResizeAspect;avLayer.frame = _containerView.bounds;[_containerView.layer addSublayer:avLayer];

//第六步：执行play方法，开始播放//本地视频可以直接播放//网络视频需要监测AVPlayerItem的status属性为AVPlayerStatusReadyToPlay时方法才会生效[self.player play];

//1.注册观察者，监测播放器属性//观察Status属性，可以在加载成功之后得到视频的长度[self.player.currentItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];//观察loadedTimeRanges，可以获取缓存进度，实现缓冲进度条[self.player.currentItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil];

//2.添加属性观察- (void)observeValueForKeyPath:(NSString *)keyPath  ofObject:(id)object  change:(NSDictionary *)change  context:(void *)context { AVPlayerItem *playerItem = (AVPlayerItem *)object; if ([keyPath isEqualToString:@"status"]) { //获取playerItem的status属性最新的状态 AVPlayerStatus status = [[change objectForKey:@"new"] intValue]; switch (status) { case AVPlayerStatusReadyToPlay:{ //获取视频长度 CMTime duration = playerItem.duration;  //更新显示:视频总时长(自定义方法显示时间的格式) self.totalNeedPlayTimeLabel.text = [self formatTimeWithTimeInterVal:CMTimeGetSeconds(duration)]; //开启滑块的滑动功能 self.sliderView.enabled = YES; //关闭加载Loading提示 [self showaAtivityInDicatorView:NO]; //开始播放视频 [self.player play]; break; } case AVPlayerStatusFailed:{//视频加载失败，点击重新加载 [self showaAtivityInDicatorView:NO];//关闭Loading视图 self.playerInfoButton.hidden = NO; //显示错误提示按钮，点击后重新加载视频 [self.playerInfoButton setTitle:@"资源加载失败，点击继续尝试加载" forState: UIControlStateNormal]; break; } case AVPlayerStatusUnknown:{ NSLog(@"加载遇到未知问题:AVPlayerStatusUnknown"); break; } default: break; } } else if ([keyPath isEqualToString:@"loadedTimeRanges"]) { //获取视频缓冲进度数组，这些缓冲的数组可能不是连续的 NSArray *loadedTimeRanges = playerItem.loadedTimeRanges; //获取最新的缓冲区间 CMTimeRange timeRange = [loadedTimeRanges.firstObject CMTimeRangeValue]; //缓冲区间的开始的时间 NSTimeInterval loadStartSeconds = CMTimeGetSeconds(timeRange.start); //缓冲区间的时长 NSTimeInterval loadDurationSeconds = CMTimeGetSeconds(timeRange.duration); //当前视频缓冲时间总长度 NSTimeInterval currentLoadTotalTime = loadStartSeconds + loadDurationSeconds; //NSLog(@"开始缓冲:%f,缓冲时长:%f,总时间:%f", loadStartSeconds, loadDurationSeconds, currentLoadTotalTime); //更新显示：当前缓冲总时长 _currentLoadTimeLabel.text = [self formatTimeWithTimeInterVal:currentLoadTotalTime]; //更新显示：视频的总时长 _totalNeedLoadTimeLabel.text = [self formatTimeWithTimeInterVal:CMTimeGetSeconds(self.player.currentItem.duration)]; //更新显示：缓冲进度条的值 _progressView.progress = currentLoadTotalTime/CMTimeGetSeconds(self.player.currentItem.duration); }}

//转换时间格式的方法- (NSString *)formatTimeWithTimeInterVal:(NSTimeInterval)timeInterVal{ int minute = 0, hour = 0, secend = timeInterVal; minute = (secend % 3600)/60; hour = secend / 3600; secend = secend % 60; return [NSString stringWithFormat:@"%02d:%02d:%02d", hour, minute, secend];}

 typedef struct{ CMTimeValue value; // 帧数 CMTimeScale timescale; // 帧率（影片每秒有几帧） CMTimeFlags flags; CMTimeEpoch epoch; } CMTi

//方法1：CMTimeMakeWithSeconds(Flout64 seconds, int32_t scale)//方法2：CMTimeMake(int64_t value, int32_t scale)//注：两者的区别在于方法一的第一个参数可以是float

//视频总时长，在AVPlayerItem状态为AVPlayerStatusReadyToPlay时获取CMTime duration = self.player.currentItem.duration;CGFloat totalTime = CMTimeGetSeconds(duration);//当前AVPlayer的播放时长CMTime cmTime = self.player.currentTime;CGFloat currentTime = CMTimeGetSeconds(cmTime);

__weak __typeof(self) weakSelf = self;[self.player addPeriodicTimeObserverForInterval:CMTimeMake(1, 1) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) { //当前播放的时间 NSTimeInterval currentTime = CMTimeGetSeconds(time); //视频的总时间 NSTimeInterval totalTime = CMTimeGetSeconds(weakSelf.player.currentItem.duration); //设置滑块的当前进度 weakSelf.sliderView.value = currentTime/totalTime; //设置显示的时间：以00:00:00的格式 weakSelf.currentTimeLabel.text = [weakSelf formatTimeWithTimeInterVal:currentTime]; }];

//UISlider的响应方法:拖动滑块，改变播放进度- (IBAction)sliderViewChange:(id)sender { if(self.player.status == AVPlayerStatusReadyToPlay){ NSTimeInterval playTime = self.sliderView.value * CMTimeGetSeconds(self.player.currentItem.duration); CMTime seekTime = CMTimeMake(playTime, 1); [self.player seekToTime:seekTime completionHandler:^(BOOL finished) { }]; }}

//步骤1：获取视频路径NSString *webVideoPath = @"http://api.junqingguanchashi.net/yunpan/bd/c.php?vid=/junqing/1213.mp4";NSURL *webVideoUrl = [NSURL URLWithString:webVideoPath];//步骤2：创建AVPlayerAVPlayer *avPlayer = [[AVPlayer alloc] initWithURL:webVideoUrl];//步骤3：使用AVPlayer创建AVPlayerViewController，并跳转播放界面AVPlayerViewController *avPlayerVC =[[AVPlayerViewController alloc] init];avPlayerVC.player = avPlayer;[self presentViewController:avPlayerVC animated:YES completion:nil];

//步骤1：获取视频路径NSString *webVideoPath = @"http://api.junqingguanchashi.net/yunpan/bd/c.php?vid=/junqing/1213.mp4";NSURL *webVideoUrl = [NSURL URLWithString:webVideoPath];//步骤2：创建AVPlayerAVPlayer *avPlayer = [[AVPlayer alloc] initWithURL:webVideoUrl];//步骤3：使用AVPlayer创建AVPlayerViewController，并跳转播放界面AVPlayerViewController *avPlayerVC =[[AVPlayerViewController alloc] init];avPlayerVC.player = avPlayer;//步骤4：设置播放器视图大小avPlayerVC.view.frame = CGRectMake(25, 0, 320, 300);//特别注意:AVPlayerViewController不能作为局部变量被释放，否则无法播放成功//解决1.AVPlayerViewController作为属性//解决2:使用addChildViewController，AVPlayerViewController作为子视图控制器[self addChildViewController:avPlayerVC];[self.view addSubview:avPlayerVC.view];