iOS AVPlayer视频播放器
一、运行效果
二、实现过程
①、创建播放器avPlayer
//创建播放器
url = [url stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
AVPlayer *player = [AVPlayer playerWithURL:[NSURL URLWithString:url]];
self.avPlayer = player;
②、创建显示屏_videoLayer
- (void)createDisplay{
// 显示图像的
_videoLayer = [AVPlayerLayer playerLayerWithPlayer:self.avPlayer];
//锚点的坐标
_videoLayer.position = CGPointMake(KPLAYVIEWWIDTH/2, KPLAYVIEWHEIGHT/2);
_videoLayer.bounds = CGRectMake(0, 0, KPLAYVIEWWIDTH, KPLAYVIEWHEIGHT);
// 锚点，值只能是0,1之间
_videoLayer.anchorPoint = CGPointMake(0.5, 0.5);
// AVLayerVideoGravityResizeAspect 按比例压缩，视频不会超出Layer的范围（默认）
// AVLayerVideoGravityResizeAspectFill 按比例填充Layer，不会有黑边
// AVLayerVideoGravityResize 填充整个Layer，视频会变形
// 视频内容拉伸的选项
_videoLayer.videoGravity = AVLayerVideoGravityResizeAspect;
// //播放时，视频实际占的区域
// NSLog(@"%@", NSStringFromCGRect(videoLayer.videoRect));
//Layer只能添加到Layer上面
[self.displayView.layer addSublayer:_videoLayer];
}
③、添加观察者和通知，用于监测更新视频播放的状态、进度、屏幕方向、状态栏属性、音量等等。
主要代码如下：
//监测屏幕旋转
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChange:) name:UIDeviceOrientationDidChangeNotification object:nil];
//添加AVPlayerItem播放结束通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playFinished:) name:AVPlayerItemDidPlayToEndTimeNotification object:self.avPlayer.currentItem];
//添加AVPlayerItem开始缓冲通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(bufferStart:) name:AVPlayerItemPlaybackStalledNotification object:self.avPlayer.currentItem];
//KOV监控 播放器进度更新
- (void)addObserverForAVPlayer
{
AVPlayerItem *playerItem = self.avPlayer.currentItem;
// 给AVPlayer添加观察者 必须实现 - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context；
//监控播放速率
[self.avPlayer addObserver:self forKeyPath:@"rate" options:NSKeyValueObservingOptionNew context:nil];
//监控状态属性(AVPlayer也有一个status属性，通过监控它的status也可以获得播放状态)
[playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:nil];
//监控网络加载缓冲情况属性
[playerItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil];
//监控是否可播放
[playerItem addObserver:self forKeyPath:@"playbackLikelyToKeepUp" options:NSKeyValueObservingOptionNew context:nil];
//播放进度观察者 //设置每0.1秒执行一次
__weak GOVVideoView *weakSelf = self;
_playerTimeObserver = [self.avPlayer addPeriodicTimeObserverForInterval:CMTimeMake(1.0, 10.0) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {
if (weakSelf.dragSlider) {
return ;
}
CGFloat current = CMTimeGetSeconds(time);
weakSelf.current = current;
CMTime totalTime = weakSelf.avPlayer.currentItem.duration;
CGFloat total = CMTimeGetSeconds(totalTime);
weakSelf.total = total;
weakSelf.slider.value = current/total;
weakSelf.currentTimeLabel.text = [weakSelf timeFormatted:current];
weakSelf.totalTimeLabel.text = [NSString stringWithFormat:@"/%@",[weakSelf timeFormatted:total]] ;
}];
}
//通过KVO监控回调
//keyPath 监控属性 object 监视器 change 状态改变 context 上下文
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
if ([keyPath isEqualToString:@"loadedTimeRanges"]) {
//监控网络加载情况属性
NSArray *array = self.avPlayer.currentItem.loadedTimeRanges;
//本次缓冲时间范围
CMTimeRange timeRange = [array.firstObject CMTimeRangeValue];
CGFloat startSeconds = CMTimeGetSeconds(timeRange.start);
CGFloat durationSeconds = CMTimeGetSeconds(timeRange.duration);
//现有缓冲总长度
CGFloat totalBuffer = startSeconds + durationSeconds;
//视频总时长
CMTime totalTime = self.avPlayer.currentItem.duration;
CGFloat total = CMTimeGetSeconds(totalTime);
if (totalBuffer/total <= 1.0 ) {
[self.progressView setProgress:totalBuffer/total animated:YES];
}
}else if([keyPath isEqualToString:@"playbackLikelyToKeepUp"]){
if (self.avPlayer.currentItem.playbackLikelyToKeepUp == YES) {
if (_activityView != nil) {
[self.activityView startAnimating];
[self.activityView removeFromSuperview];
_activityView = nil;
}
}
}else if ([keyPath isEqualToString:@"status"]){
//监控状态属性
AVPlayerStatus status = [[change objectForKey:@"new"] intValue];
switch ((status)) {
case AVPlayerStatusReadyToPlay:
break;
case AVPlayerStatusUnknown:
break;
case AVPlayerStatusFailed:
break;
}
}else if ([keyPath isEqualToString:@"rate"]){
if (self.avPlayer.rate == 1) {
}
}
}
隐藏/显示状态栏的方法：
[[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationNone];这个方法在iOS9之后弃用了，并且需要
将View controller-based status bar appearance设置为NO；而下面的重写方法需要将View controller-based status bar appearance设置为YES，这个方法在iOS7之后就有了；
//刷新状态栏状态
[self setNeedsStatusBarAppearanceUpdate];
#pragma mark -- 隐藏/显示状态栏的方法
/*[[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationNone];这个方法在iOS9之后弃用了，并且需要
将View controller-based status bar appearance设置为NO；而下面的重写方法需要将View controller-based status bar appearance设置为YES，这个方法在iOS7之后就有了；
//刷新状态栏状态
[self setNeedsStatusBarAppearanceUpdate];
*/
//设置样式
- (UIStatusBarStyle)preferredStatusBarStyle {
return UIStatusBarStyleLightContent;
}
//设置是否隐藏
- (BOOL)prefersStatusBarHidden {
return self.isHiddenStatusBar;
}
//设置隐藏动画
- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation {
return UIStatusBarAnimationNone;
}
④、创建用于处理播放结束、关闭播放器、全屏/退出全屏、隐藏/展示footBar和topBar的Block回调方法和代理方法，方便用户做些自定义的操作。
//Block回调方法
typedef void(^FullScreenBlock)(BOOL isFull);
typedef void(^ClosePLayerBlock)();
typedef void(^ShowBarBlock)(BOOL isShow);
typedef void(^PlayFinishedBlock)();
@class GOVVideoPlayer;
//代理方法
@protocol GOVVideoPlayerDelegate <NSObject>
//播放结束
- (void)videoPlayerPlayFinished:(GOVVideoPlayer *)videoPlayer;
//关闭播放器
- (void)videoPlayerClosePlayer:(GOVVideoPlayer *)videoPlayer;
//全屏按钮
- (void)videoPlayerFullScreen:(GOVVideoPlayer *)videoPlayer withIsFull:(BOOL)isFull;
//隐藏/展示footBar和topBar
- (void)videoPlayerShowBar:(GOVVideoPlayer *)videoPlayer withIsShow:(BOOL)isShow;
三、项目结构图
四、补充
GOVVideoPlayer是在继承于UIView的基础上封装的视频View;
GOVVideoController是在继承于UIViewController的基础上封装的视频视图控制器。
两者最大的不同是在全屏和取消全屏的处理上面：前者是一个视图View，可以直接加在父视图上面，全屏时是加在 [UIApplication sharedApplication].keyWindow上的，而后者，小屏时是取GOVVideoController的View加在父视图上，全屏和取消全屏时是采用present和dismiss模态化转场的方法 。
iOS AVPlayer视频播放器
注：本文著作权归作者，由demo大师代发，拒绝转载，转载需要作者授权
