采用调用苹果自带的AVPlayer来实现，但还是支持大部分格式的视频
主要功能：
1.视频播放，暂停
2.视频缓冲，视频播放状态
3.监听播放进度
4.监听播放完成
一.播放视频
1.将网络或者本地视频转化为NSURL
2.加载到播放器
self.playerItem = [AVPlayerItem playerItemWithURL:url];
self.player = [AVPlayer playerWithPlayerItem:self.playerItem];
3.创建播放视图
AVPlayerLayer *playerLayer=[AVPlayerLayer playerLayerWithPlayer:self.player];
playerLayer.frame = view.bounds;
playerLayer.videoGravity=AVLayerVideoGravityResizeAspect;//视频填充模式
[view.layer addSublayer:playerLayer];
4.调用播放/暂停方法
- (void)start {
[self.player play];
}
- (void)pause {
[self.player pause];
}
二.视频缓冲，视频播放状态
1.通过kvo监听AVPlayerItem的属性status和loadedTimeRanges
[playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:&PlayerItemStatusContext];
//监控网络加载情况属性
[playerItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:&PlayerItemLoadedTimeRangesContext];
2.根据属性的改变判断做相应处理
AVPlayerItemStatusReadyToPlay为正常播放状态
3.loadedTimeRanges属性就是加载的数据可以用来计算缓冲进度
NSTimeInterval timeInterval = [self availableDuration];// 计算缓冲进度
CMTime duration = self.playerItem.duration;
CGFloat totalDuration = CMTimeGetSeconds(duration);
//缓冲进度－－－－－－－－－－－－
self.toolBarView.playerProgress.progress = timeInterval / totalDuration;
//时间算法
- (NSTimeInterval)availableDuration {
NSArray *loadedTimeRanges = [[_player currentItem] loadedTimeRanges];
CMTimeRange timeRange = [loadedTimeRanges.firstObject CMTimeRangeValue];// 获取缓冲区域
float startSeconds = CMTimeGetSeconds(timeRange.start);
float durationSeconds = CMTimeGetSeconds(timeRange.duration);
NSTimeInterval result = startSeconds + durationSeconds;// 计算缓冲总进度
return result;
}
三.监听播放进度
使用NSTimer执行updateProgressInfo方法
- (void)updateProgressInfo{
if (!self.isPlaying) return;
// 1.更新时间
self.toolBarView.timeLabel.text = [self updateTimeString];
double currentTime = CMTimeGetSeconds(self.player.currentTime);
// 2.设置进度条的value
self.toolBarView.playerSlider.value = currentTime;
}
#pragma mark - 讲当前时间转成时间戳给label显示
- (NSString*)updateTimeString
{
NSTimeInterval currentTime = CMTimeGetSeconds(self.player.currentItem.currentTime);
NSTimeInterval duration = CMTimeGetSeconds(self.player.currentItem.duration);
return [self stringWithCurrentTime:currentTime duration:duration];
}
- (NSString *)stringWithCurrentTime:(NSTimeInterval)currentTime duration:(NSTimeInterval)duration
{
NSInteger dMin = duration / 60;
NSInteger dSec = (NSInteger)duration % 60;
NSInteger cMin = currentTime / 60;
NSInteger cSec = (NSInteger)currentTime % 60;
NSString *durationString = [NSString stringWithFormat:@"%02ld:%02ld", dMin, dSec];
NSString *currentString = [NSString stringWithFormat:@"%02ld:%02ld", cMin, cSec];
return [NSString stringWithFormat:@"%@/%@", currentString, durationString];
}
四.监听播放完成
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playerEndPlay:) name:AVPlayerItemDidPlayToEndTimeNotification object:self.playerItem];
