iOS开发（OC）——音视频播放

iOS开发交流群：301058503

Demo地址：https://github.com/liumude/MediaPlay.git
（自己封装的，写得不好还请指出）

1. 新建一个继承NSObject的类PlayModel
2. 导入音视频播放需要的头文件

#import <Foundation/Foundation.h>#import <MediaPlayer/MediaPlayer.h>#import <AVFoundation/AVFoundation.h>#import <AVKit/AVKit.h>

3.创建播放单例

+(PlayModel *)shareInstance{    static PlayModel *player = nil;    static dispatch_once_t onceToken;    dispatch_once(&onceToken, ^{        player = [[PlayModel alloc] init];    });    return player;}

4.音频播放初始化

//音频-(void)initAudioPlayerWithUrl:(NSURL *)url{    playerItem = [AVPlayerItem playerItemWithURL:url];    audioPlayer =[AVPlayer playerWithPlayerItem:playerItem];    [self start];    currentTime = 0;//    //支持后台播放 还要在background modes 勾选Audio,AirPlay//    AVAudioSession *session = [AVAudioSession sharedInstance];//    [session setActive:YES error:nil];//    [session setCategory:AVAudioSessionCategoryPlayback error:nil];}

5.视频播放初始化

//视频-(void)initMoviePlayerWithUrl:(NSURL *)url addToView:(UIView *)view{    playerItem = [AVPlayerItem playerItemWithURL:url];    audioPlayer =[[AVPlayer alloc] initWithPlayerItem:playerItem];    playerLayer = [AVPlayerLayer playerLayerWithPlayer:audioPlayer];    playerLayer.frame = CGRectMake(0, 0, view.frame.size.width, view.frame.size.height);    [view.layer addSublayer:playerLayer];    playerLayer.videoGravity =AVLayerVideoGravityResizeAspect;    currentTime = 0;}

6.开始播放的方法

-(void)start{    [audioPlayer play];    if(_timer != nil){        [_timer invalidate];        _timer = nil;    }    //获取播放进度    _timer = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(progressAction) userInfo:nil repeats:YES];    //播放开始的通知    [[NSNotificationCenter defaultCenter] removeObserver:self name:@"PlayStart" object:nil];    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playStart:) name:@"PlayStart" object:nil];    //播放结束的通知    [[NSNotificationCenter defaultCenter] removeObserver:self name:@"PlayEnd" object:nil];    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playEnd:) name:@"PlayEnd" object:nil];}

7.获取当前时间和总时间

-(CGFloat)currentTime{    return CMTimeGetSeconds(playerItem.currentTime);}-(CGFloat)duration{    return CMTimeGetSeconds(playerItem.duration);}

8.播放进度

-(void)progressAction{    if(currentTime < [self currentTime]){//当前时间比播放前的时间大，播放开始        [[NSNotificationCenter defaultCenter] postNotificationName:@"PlayStart" object:nil userInfo:nil];    }    if([self currentTime] >= [self duration]){//播放结束        [[NSNotificationCenter defaultCenter] postNotificationName:@"PlayEnd" object:nil userInfo:nil];    }    if(_isplaying){        if(_playDelegate != nil){            [_playDelegate playingProgress:[self currentTime]/[self duration]];        }    }}

9.从特定时间开始播放

//从特定时间开始播放-(void)playWithTime:(CGFloat)time{    [self pause];    CMTime pointTime = CMTimeMake(time * [self duration], 1);    currentTime = time * [self duration];//获取播放前的当前时间    [playerItem seekToTime:pointTime toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero];    [self start];}

以上是主要代码，详细请看Demo：https://github.com/liumude/MediaPlay.git

iOS开发交流群：301058503