前言:直播模块主要采用了BiliBili视频提供的开源框架ijkplayer完成拉流，优酷的来疯直播提供的开源框架LFLiveKit完成直播推流。项目中同时还涉及了动画，绘图，定位，自动布局，三方登录等等热门技术。

                     # 核心代码

#import <IJKMediaFramework/IJKMediaFramework.h>

@interface ZYSPlayerViewController ()
@property(atomic, retain) id<IJKMediaPlayback> player;

@end
- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    
    self.navigationController.navigationBarHidden = YES;
    
    //注册直播需要用的通知
    [self installMovieNotificationObservers];
    
    //准备播放
    [self.player prepareToPlay];

}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    
    self.navigationController.navigationBarHidden = NO;
    //关闭直播
    [self.player shutdown];
    [self removeMovieNotificationObservers];
    
}


- (void)viewDidLoad {
    [super viewDidLoad];
    // 初始化
    [self initPlayer];
    
}

- (void)initPlayer {
    ///初始化ijkplayer并添加
    IJKFFOptions * options = [IJKFFOptions optionsByDefault];
    IJKFFMoviePlayerController * player = [[IJKFFMoviePlayerController alloc] initWithContentURLString:self.live.streamAddr withOptions:options];
    self.player = player;
    self.player.view.frame = self.view.bounds;
    self.player.shouldAutoplay = YES;
    [self.view addSubview:self.player.view];

}

注册通知&移除通知注册通知(ijkplayer是对FFMPeg进行封装,对拉流得到的H264视频编码以及AAC的音频进行解析,通过通知做响应的操作)

                      # 关键代码
#pragma mark Install Movie Notifications(注册通知ijkplayer是对FFMPeg进行封装,对拉流得到的H264视频编码以及AAC的音频进行解析,通过通知做响应的操作)

/* Register observers for the various movie object notifications. */
-(void)installMovieNotificationObservers
{
    //监听网络环境，监听缓冲方法
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(loadStateDidChange:)
                                                 name:IJKMPMoviePlayerLoadStateDidChangeNotification
                                               object:_player];
    //监听直播完成回调
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlayBackDidFinish:)
                                                 name:IJKMPMoviePlayerPlaybackDidFinishNotification
                                               object:_player];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(mediaIsPreparedToPlayDidChange:)
                                                 name:IJKMPMediaPlaybackIsPreparedToPlayDidChangeNotification
                                               object:_player];
    //监听用户主动操作
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlayBackStateDidChange:)
                                                 name:IJKMPMoviePlayerPlaybackStateDidChangeNotification
                                               object:_player];
}

#pragma mark Remove Movie Notification Handlers

/* Remove the movie notification observers from the movie object. */
-(void)removeMovieNotificationObservers
{
    [[NSNotificationCenter defaultCenter]removeObserver:self name:IJKMPMoviePlayerLoadStateDidChangeNotification object:_player];
    [[NSNotificationCenter defaultCenter]removeObserver:self name:IJKMPMoviePlayerPlaybackDidFinishNotification object:_player];
    [[NSNotificationCenter defaultCenter]removeObserver:self name:IJKMPMediaPlaybackIsPreparedToPlayDidChangeNotification object:_player];
    [[NSNotificationCenter defaultCenter]removeObserver:self name:IJKMPMoviePlayerPlaybackStateDidChangeNotification object:_player];
}

///直播状态变化的监听
- (void)moviePlayBackStateDidChange:(NSNotification*)notification
{

    //    MPMoviePlaybackStateStopped,
    //    MPMoviePlaybackStatePlaying,
    //    MPMoviePlaybackStatePaused,
    //    MPMoviePlaybackStateInterrupted,
    //    MPMoviePlaybackStateSeekingForward,
    //    MPMoviePlaybackStateSeekingBackward
    
    switch (_player.playbackState)
    {
        case IJKMPMoviePlaybackStateStopped: {
            NSLog(@"IJKMPMoviePlayBackStateDidChange %d: stoped", (int)_player.playbackState);
            break;
        }
        case IJKMPMoviePlaybackStatePlaying: {
            NSLog(@"IJKMPMoviePlayBackStateDidChange %d: playing", (int)_player.playbackState);
            

            
            break;
        }
        case IJKMPMoviePlaybackStatePaused: {
            NSLog(@"IJKMPMoviePlayBackStateDidChange %d: paused", (int)_player.playbackState);
            break;
        }
        case IJKMPMoviePlaybackStateInterrupted: {
            NSLog(@"IJKMPMoviePlayBackStateDidChange %d: interrupted", (int)_player.playbackState);
            break;
        }
        case IJKMPMoviePlaybackStateSeekingForward:
        case IJKMPMoviePlaybackStateSeekingBackward: {
            NSLog(@"IJKMPMoviePlayBackStateDidChange %d: seeking", (int)_player.playbackState);
            break;
        }
        default: {
            NSLog(@"IJKMPMoviePlayBackStateDidChange %d: unknown", (int)_player.playbackState);
            break;
        }
    }
}
///直播结束的监听
- (void)moviePlayBackDidFinish:(NSNotification*)notification
{
    //    MPMovieFinishReasonPlaybackEnded, 直播结束
    //    MPMovieFinishReasonPlaybackError, 直播错误
    //    MPMovieFinishReasonUserExited  用户退出
    int reason = [[[notification userInfo] valueForKey:IJKMPMoviePlayerPlaybackDidFinishReasonUserInfoKey] intValue];
    
    switch (reason)
    {
        case IJKMPMovieFinishReasonPlaybackEnded:
            NSLog(@"playbackStateDidChange: IJKMPMovieFinishReasonPlaybackEnded: %d\n", reason);
            break;
            
        case IJKMPMovieFinishReasonUserExited:
            NSLog(@"playbackStateDidChange: IJKMPMovieFinishReasonUserExited: %d\n", reason);
            break;
            
        case IJKMPMovieFinishReasonPlaybackError:
            NSLog(@"playbackStateDidChange: IJKMPMovieFinishReasonPlaybackError: %d\n", reason);
            break;
            
        default:
            NSLog(@"playbackPlayBackDidFinish: ???: %d\n", reason);
            break;
    }
}

///相关设置状态
- (void)loadStateDidChange:(NSNotification*)notification
{
    //    MPMovieLoadStateUnknown        = 0,未知
    //    MPMovieLoadStatePlayable       = 1 << 0,缓冲结束可以播放
    //    MPMovieLoadStatePlaythroughOK  = 1 << 1, // Playback will be automatically started in this state when shouldAutoplay is YES 缓冲结束自动播放
    //    MPMovieLoadStateStalled        = 1 << 2, // Playback will be automatically paused in this state, if started
    //暂停
    
    IJKMPMovieLoadState loadState = _player.loadState;
    
    if ((loadState & IJKMPMovieLoadStatePlaythroughOK) != 0) {
        NSLog(@"loadStateDidChange: IJKMPMovieLoadStatePlaythroughOK: %d\n", (int)loadState);
    } else if ((loadState & IJKMPMovieLoadStateStalled) != 0) {
        NSLog(@"loadStateDidChange: IJKMPMovieLoadStateStalled: %d\n", (int)loadState);
    } else {
        NSLog(@"loadStateDidChange: ???: %d\n", (int)loadState);
    }
    
    self.blurImageView.hidden = YES;
    [self.blurImageView removeFromSuperview];
}