iOS 开发直播app（nginx+LFLiveKit+IJKM

一、nginx + rtmp +ffmpeg服务器安装教程
地址：https://www.jianshu.com/p/b1207e41edaf

二、LFLiveKit库（推流）
使用Cocoapod导入LFLiveKit库

三、IJKMediaPlayer库集成教程（拉流）
地址：https://www.jianshu.com/p/82f435ae21cf

四：配置手机网络
1、配置好nginx服务器的Mac和ipone连接同一个wifi
2、查看Mac当前网络IP

image.png

3、进入手机当前网络的配置代理，将服务器ip设置为Mac的ip，端口为8080

image.png

五：代码实现
推流

#import <LFLiveKit.h>
#import <AVFoundation/AVFoundation.h>
 
@interface RecordingViewController ()<LFLiveSessionDelegate>
@property (nonatomic,strong) LFLiveSession *session;
@end
 
@implementation RecordingViewController
 
- (void)viewDidLoad {
    [super viewDidLoad];
    [self beatutyfaceBtn];
    //录制端
    [self requestAccessForVidoe];
    [self requestAudio];
    [self startLive];
}
 
- (void)beatutyfaceBtn{
    UIButton *actionBtn = [UIButton buttonWithType:UIButtonTypeSystem];
    actionBtn.backgroundColor = [UIColor redColor];
    [actionBtn setTitle:@"开始直播" forState:UIControlStateNormal];
    [actionBtn addTarget:self action:@selector(openBeatyface:) forControlEvents:UIControlEventTouchUpInside];
    actionBtn.frame = CGRectMake(self.view.center.x - 50, 400, 100, 50);
    [self.view addSubview:actionBtn];
}
 
- (LFLiveSession*)session {
    if (!_session) {
        _session = [[LFLiveSession alloc] initWithAudioConfiguration:[LFLiveAudioConfiguration defaultConfiguration] videoConfiguration:[LFLiveVideoConfiguration defaultConfiguration]];
        _session.preView = self.view;
        _session.showDebugInfo = YES;
        _session.delegate = self;
    }
    return _session;
}
 
//获取系统的摄像头权限,获取视屏资源:
- (void)requestAccessForVidoe{
    __weak typeof (self) weakSelf = self;
    //判断授权状态
    AVAuthorizationStatus statues = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    switch (statues) {
        case AVAuthorizationStatusNotDetermined:{
            //发起授权请求
            [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
                if (granted) {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        //进行会话
                        [weakSelf.session setRunning:YES];
                    });
                }
            }];
            break;
        }
        case AVAuthorizationStatusAuthorized:{
            //已授权继续
            dispatch_async(dispatch_get_main_queue(), ^{
                [weakSelf.session setRunning:YES];
            });
            break;
        }
        default:
            break;
    }
}
 
//获取音频权限与资源:
- (void)requestAudio
{
    __weak typeof (self) weakSelf = self;
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];
    switch (status) {
        case AVAuthorizationStatusNotDetermined:{
            //发起授权请求
            [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
                if (granted) {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        //进行会话
                        [weakSelf.session setRunning:YES];
                    });
                }
            }];
            break;
        }
        case AVAuthorizationStatusAuthorized:{
            //授权继续
            dispatch_async(dispatch_get_main_queue(), ^{
                [weakSelf.session setRunning:YES];
            });
        }
        default:
            break;
    }
    
}
 
//LFLivekit监听delegate方法:
- (void)liveSession:(LFLiveSession *)session errorCode:(LFLiveSocketErrorCode)errorCode
{
    //弹出警告
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Warning" message:@"链接错误,请检查IP地址" preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *sure = [UIAlertAction actionWithTitle:@"sure" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [self.navigationController popViewControllerAnimated:YES];
    }];
    [alert addAction:sure];
    [self presentViewController:alert animated:YES completion:nil];
}
 
- (void)startLive {
    LFLiveStreamInfo *streamInfo = [LFLiveStreamInfo new];
    streamInfo.url = @"rtmp://192.168.1.121:1935/rtmplive/room";
    [self.session startLive:streamInfo];
}
 
- (void)openBeatyface:(UIButton *)btn{
    _session.beautyFace = YES;
}
 
- (void)stopLive {
    [self.session stopLive];
}
 
//MARK: - CallBack:
- (void)liveSession:(nullable LFLiveSession *)session liveStateDidChange: (LFLiveState)state{
    
}
 
- (void)liveSession:(nullable LFLiveSession *)session debugInfo:(nullable LFLiveDebug*)debugInfo{
    
}
 
- (void)viewDidDisappear:(BOOL)animated{
    [self stopLive];
}

@end

拉流

#import <IJKMediaFramework/IJKFFMoviePlayerController.h>
@interface PlayLiveViewController ()
@property(nonatomic,strong)IJKFFMoviePlayerController * player;
@end

@implementation PlayLiveViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    IJKFFOptions *options = [IJKFFOptions optionsByDefault]; //使用默认配置
    NSURL * url = [NSURL URLWithString:@"rtmp://192.168.1.121:1935/rtmplive/room"];
    self.player = [[IJKFFMoviePlayerController alloc] initWithContentURL:url withOptions:options]; 
    self.player.view.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
    self.player.view.frame = self.view.bounds;
    self.player.scalingMode = IJKMPMovieScalingModeAspectFit;
    self.player.shouldAutoplay = YES;
    
    self.view.autoresizesSubviews = YES;
    [self.view addSubview:self.player.view];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [self.player prepareToPlay];
}

-(void)viewDidDisappear:(BOOL)animated {
    [super viewDidDisappear:animated];
    [self.player shutdown];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

rtmp://192.168.1.121:1935/rtmplive/room

192.168.1.121：nginx 所在Mac的当前网络ip

注意事项：
plist添加
Privacy - Camera Usage Description 相机
Privacy - Microphone Usage Description 录音
Privacy - Photo Library Usage Description 相册

简单写了一个实现简易直播效果的demo
地址：https://gitee.com/xu_sheng_jie/live-demo.git