使用AVPlayer制作一个播放器

代码地址如下：
http://www.demodashi.com/demo/11685.html

AVPlayer 是一个强大的视频播放器，可以播放多种格式的视频，缺点是没有控制界面，需要自己去实现。

一、效果图

二、实现过程

先看下它的结构

首先初始化播放器，设置播放URL。

self.avPlayerView = [[XYAVPlayerView alloc] initWithFrame:CGRectMake(0, 0, ScreenWidth, VIDEO_HEIGHT)];
self.avPlayerView.videoUrl = m3u;
[self.view addSubview:self.avPlayerView];

初始化方法，添加一个视频控制器。


- (instancetype)initWithFrame:(CGRect)frame
{if ([super initWithFrame:frame]) {self.backgroundColor = [UIColor blackColor];[self addSubview:self.playControlView];}return self;
}

设置视频URL


- (void)setVideoUrl:(NSString *)videoUrl
{_videoUrl = videoUrl.copy;[self createAVPlayer];}

初始化AVPlayer，给_playControlView 引用AVPlayer，方便进行控制， [_playControlView addObserver];和[_playControlView playerTimerAction];会在后面说明。


- (void)createAVPlayer
{NSURL *url = [NSURL URLWithString:self.videoUrl];if (!url) {return;}/***  AVPlayer*/_avPlayerItem = [AVPlayerItem playerItemWithURL:url];_avPlayer = [AVPlayer playerWithPlayerItem:_avPlayerItem];_avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:_avPlayer];_avPlayerLayer.frame = self.bounds;_avPlayerLayer.videoGravity = AVLayerVideoGravityResizeAspect;//[self.layer addSublayer:_avPlayerLayer];[_avPlayer play];self.autoresizesSubviews = YES; //子视图Size自适应_playControlView.avPlayer = self.avPlayer;_playControlView.avPlayerItem = self.avPlayerItem;_playControlView.avPlayerLayer = self.avPlayerLayer;[_playControlView addObserver];[_playControlView playerTimerAction];[self bringSubviewToFront:self.playControlView];
}

到这里只是创建了一个View，上面加载了一个AVPlayer，一个视频控制器视图。

视频控制器代码：
我用的xib创建的View，所以初始化方法是awakeFromNib


- (void)awakeFromNib
{[super awakeFromNib];[self configureVolume];UITapGestureRecognizer * screenTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(screenTap)];[self addGestureRecognizer:screenTap];UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panGestureRecognizerAction:)];pan.delegate = self;[_adjustView addGestureRecognizer:pan];[self.slider setThumbImage:[UIImage imageNamed:@"verify_code_button"] forState:UIControlStateNormal];// slider开始滑动事件[_slider addTarget:self action:@selector(progressSliderTouchBegan:) forControlEvents:UIControlEventTouchDown];// slider滑动中事件[_slider addTarget:self action:@selector(progressSliderValueChanged:) forControlEvents:UIControlEventValueChanged];// slider结束滑动事件[_slider addTarget:self action:@selector(progressSliderTouchEnded:) forControlEvents:UIControlEventTouchUpInside | UIControlEventTouchCancel | UIControlEventTouchUpOutside];// slider 添加点击手势UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(sliderTap:)];[_slider addGestureRecognizer:tap];[self hiddenViews];}


/***  获取系统音量*/
- (void)configureVolume {MPVolumeView *volumeView = [[MPVolumeView alloc] init];_volumeSlider = nil;for (UIView *view in [volumeView subviews]){if ([view.class.description isEqualToString:@"MPVolumeSlider"]){_volumeSlider = (UISlider *)view;break;}}// 使用这个category的应用不会随着手机静音键打开而静音，可在手机静音下播放声音NSError *setCategoryError = nil;BOOL success = [[AVAudioSession sharedInstance]setCategory: AVAudioSessionCategoryPlaybackerror: &setCategoryError];if (!success) { /* handle the error in setCategoryError */ }}

第一个手势screenTap，是控制下方控制条的显示与隐藏的

- (void)screenTap {self.controlStripView.hidden = !self.controlStripView.hidden;
}

第二个手势则是用来控制快进、快退、音量、亮度调节的

- (void)panGestureRecognizerAction: (UIPanGestureRecognizer *)sender {//根据在view上Pan的位置，确定是调音量还是亮度CGPoint locationPoint = [sender locationInView:self];CGPoint veloctyPoint = [sender velocityInView:self];switch (sender.state) {case UIGestureRecognizerStateBegan:{// 使用绝对值来判断移动的方向CGFloat x = fabs(veloctyPoint.x);CGFloat y = fabs(veloctyPoint.y);if (x > y) { //水平移动[self showViews];[self playerPause];self.pandirection = PanDirectionHorizontalMoved;}else { //垂直移动self.pandirection = PanDirectionVerticalMoved;}break;}case UIGestureRecognizerStateChanged:{switch (_pandirection) {case PanDirectionHorizontalMoved:{[self horizontalMoved:veloctyPoint.x];break;}case PanDirectionVerticalMoved:{if (locationPoint.x > self.bounds.size.width / 2) {//音量调节-右侧[self verticalMovedForVolume:veloctyPoint.y];}else {//亮度调节-左侧[self verticalMovedForBrightness:veloctyPoint.y];}break;}}break;}case UIGestureRecognizerStateEnded:{switch (_pandirection) {case PanDirectionHorizontalMoved:{[self hiddenViews];[self playerPlay];break;}case PanDirectionVerticalMoved:{break;}}break;}default:break;}
}

对于slider的方法，在开始手势的时候暂停视频播放，显示时间label


- (void)progressSliderTouchBegan: (UISlider *)sender {self.changeTimeLabel.hidden = NO;[self playerPause];NSLog(@" --- began touch");
}

在开始手势的时候seek到slider对应时间的时间点，然后开始视频播放，隐藏时间label


- (void)progressSliderTouchEnded: (UISlider *)sender {CMTime durationTime = self.avPlayerItem.duration;NSTimeInterval currentTime = CMTimeGetSeconds(durationTime) * sender.value;[self seekWithTime:currentTime];self.changeTimeLabel.hidden = YES;[self playerPlay];NSLog(@" ---- end touch");
}

在 slider滑动的时候，只是改变label上显示的时间


- (void)progressSliderValueChanged: (UISlider *)sender {CGFloat currentTime = sender.value * CMTimeGetSeconds(self.avPlayerItem.duration);NSString *tempCurrentTime = [self timeFormatterForServiceWithTimeStamp:currentTime];//当前播放时间self.currentTimeLabel.text = tempCurrentTime;//屏幕中间时间self.changeTimeLabel.text = tempCurrentTime;CGFloat sliderProgress = sender.value / sender.maximumValue;if (self.progressView.progress < sliderProgress) {self.progressView.progress = sender.value / sender.maximumValue;}NSLog(@" --- event touch  %f",sender.value);}

slider的单击方法则是直接seek到对应时间点，AVPlayer会自动处理的。


/***  Slider Tap*/
- (void)sliderTap: (UITapGestureRecognizer *)sender {if ([sender.view isKindOfClass:[UISlider class]]) {UISlider *slider = (UISlider *)sender.view;CGPoint point = [sender locationInView:slider];CGFloat length = slider.frame.size.width;CGFloat tempValue = point.x / length;NSTimeInterval currentTime = CMTimeGetSeconds(self.avPlayerItem.duration) * tempValue;CGFloat progress = currentTime/CMTimeGetSeconds(self.avPlayerItem.duration);if (progress > slider.value) {self.progressView.progress = progress;}[self seekWithTime:currentTime];}}

前面用的 addObserver方法，则是给播放器添加观察者，用来检测播放器状态，还有APP的状态。


- (void)addObserver
{//监控状态属性，注意AVPlayer也有一个status属性，通过监控它的status也可以获得播放状态[self.avPlayerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];//监控网络加载情况属性[self.avPlayerItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil];/***  进入后台  暂停播放**/[kNotificationCenter addObserver:self selector:@selector(applicationDidEnterBackground_Notification) name:ApplicationDidEnterBackground_Notification object:nil];/***  进入活跃状态  继续播放**/[kNotificationCenter addObserver:self selector:@selector(applicationDidBecomeActive_Notification) name:ApplicationDidBecomeActive_Notification object:nil];[kNotificationCenter addObserver:self selector:@selector(playerReset) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];}/** * 通过KVO监控播放器状态 ** @param keyPath 监控属性* @param object 监视器* @param change 状态改变* @param context 上下文 */
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context
{AVPlayerItem *playerItem=object;if ([keyPath isEqualToString:@"status"]) {AVPlayerStatus status= [[change objectForKey:@"new"] intValue];if(status==AVPlayerStatusReadyToPlay){//总时长self.allTimeLabel.text = [self timeFormatterForServiceWithTimeStamp:CMTimeGetSeconds(playerItem.duration)];self.currentTimeLabel.text = @"00:00:00";NSLog(@"正在播放...，视频总长度:%.2f",CMTimeGetSeconds(playerItem.duration));}}else if([keyPath isEqualToString:@"loadedTimeRanges"]){NSArray *array=playerItem.loadedTimeRanges;CMTimeRange timeRange = [array.firstObject CMTimeRangeValue];//本次缓冲时间范围float startSeconds = CMTimeGetSeconds(timeRange.start);float durationSeconds = CMTimeGetSeconds(timeRange.duration);NSTimeInterval totalBuffer = startSeconds + durationSeconds;//缓冲总长度NSLog(@"共缓冲：%.2f",totalBuffer);double ableScale = totalBuffer / CMTimeGetSeconds(playerItem.duration);if (ableScale <= 1) {self.progressView.progress = ableScale;}}
}

playerTimerAction方法则是制定每秒进行一次返回，返回当前播放进度。


- (void)playerTimerAction
{__weak XYAVControlView * weakSelf = self;[self.avPlayer addPeriodicTimeObserverForInterval:CMTimeMake(1.0, 1.0) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {float current=CMTimeGetSeconds(time);if (current) {//当前播放进度weakSelf.currentTimeLabel.text = [weakSelf timeFormatterForServiceWithTimeStamp:CMTimeGetSeconds(weakSelf.avPlayerItem.currentTime)];//滑块进度double totalTempTime = CMTimeGetSeconds(weakSelf.avPlayerItem.duration);double scale = CMTimeGetSeconds(weakSelf.avPlayerItem.currentTime) / totalTempTime;weakSelf.slider.value = scale;}}];
}

最后在 ViewController 里面监控屏幕方向的变化，来处理全屏效果


[kNotificationCenter  addObserver:selfselector:@selector(onDeviceOrientationChange)name:UIDeviceOrientationDidChangeNotificationobject:nil];/***  屏幕方向发生变化会调用这里*/
- (void)onDeviceOrientationChange
{UIDeviceOrientation orientation             = [UIDevice currentDevice].orientation;UIInterfaceOrientation interfaceOrientation = (UIInterfaceOrientation)orientation;switch (interfaceOrientation) {case UIInterfaceOrientationPortraitUpsideDown:case UIInterfaceOrientationPortrait:{self.view.frame = (CGRect){0,0,ScreenWidth,ScreenHeight};self.avPlayerView.frame = CGRectMake(0, 0,ScreenWidth,VIDEO_HEIGHT);self.avPlayerView.playControlView.isFullScreen = NO;break;}case UIInterfaceOrientationLandscapeLeft:case UIInterfaceOrientationLandscapeRight:{self.view.frame = (CGRect){0,0,ScreenWidth,ScreenHeight};self.avPlayerView.frame = self.view.bounds;self.avPlayerView.playControlView.isFullScreen = YES;break;}default:break;}
}

到这里一个简单的视频播放器就做完了。

三、项目代码截图

第一层目录结构

第二层目录结构

使用AVPlayer制作一个播放器

代码地址如下：
http://www.demodashi.com/demo/11685.html

注：本文著作权归作者，由demo大师发表，拒绝转载，转载需要作者授权