ios-Pili直播使用和问题总结

1.建议使用cocoapods导入sdk使用，可以参考文档：https://github.com/pili-engineering/PLCameraStreamingKit#%E9%85%8D%E7%BD%AE%E5%B7%A5%E7%A8%8B
2.代码梳理
demo：
https://github.com/pili-engineering/PLCameraStreamingKit/tree/master/Example

2.1 在 AppDelegate.m 中初始化sdk，否则会抛出异常
#import 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [PLStreamingEnv initEnv];
    // Override point for customization after application launch.
    return YES;
}

2.2 导入头文件,使用代理（不要忘记设置代理和初始化数据）
#import 

@interface ViewController ()<PLCameraStreamingSessionDelegate,PLStreamingSendingBufferDelegate>

2.3 
- (void)viewDidLoad {
    [super viewDidLoad];
    //初始化串行队列 DISPATCH_QUEUE_SERIAL
    self.sessionQueue = dispatch_queue_create("pili.queue.streaming", DISPATCH_QUEUE_SERIAL);
  /*
   先判断是否授权，switch 根据不同的授权调用相应的方法
   未授权，授权后在执行
   授权，配置流的相关信息
   */
 //判断相机、麦克风是否授权
    switch ([PLCameraStreamingSession cameraAuthorizationStatus]) {
          //授权
        case PLAuthorizationStatusAuthorized:
            permissionBlock();
            break;
          //未授权           
        case PLAuthorizationStatusNotDetermined: {
            [PLCameraStreamingSession requestCameraAccessWithCompletionHandler:^(BOOL granted) {
                granted ? permissionBlock() : noAccessBlock();
            }];
        }
            break;
        default:
            noAccessBlock();
            break;
    }
    //未授权
    void (^noAccessBlock)(void) = ^{
        //询问是否授权 
        UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"授权" message:@"是否授权" preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];        
        UIAlertAction *defult = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil];

        [alert addAction:cancel];
        [alert addAction:defult];
        [self presentViewController:alert animated:YES completion:nil];
    };

    //授权，添加配置信息
     void (^permissionBlock)(void) = ^{
         //相机采集信息配置  
         PLVideoCaptureConfiguration *videoCC = [[PLVideoCaptureConfiguration alloc] initWithVideoFrameRate:20 sessionPreset:AVCaptureSessionPresetiFrame1280x720 horizontallyMirrorFrontFacingCamera:YES horizontallyMirrorRearFacingCamera:NO cameraPosition:AVCaptureDevicePositionFront];
         //麦克风采集信息配置
         PLAudioCaptureConfiguration *audioCC = [PLAudioCaptureConfiguration defaultConfiguration];
         //推流设置  视频（即播放的效果）
         PLVideoStreamingConfiguration *videoSC = [PLVideoStreamingConfiguration configurationWithVideoSize:CGSizeMake(320, 570) videoQuality:kPLVideoStreamingQualityLow1];        
         //推流设置  音频
         PLAudioStreamingConfiguration *audioSC = [PLAudioStreamingConfiguration configurationWithAudioQuality:kPLAudioStreamingQualityHigh2]         
         //设置摄像头
         AVCaptureVideoOrientation orientation = (AVCaptureVideoOrientation)(([[UIDevice currentDevice] orientation] <= UIDeviceOrientationLandscapeRight && [[UIDevice currentDevice] orientation] != UIDeviceOrientationUnknown) ? [[UIDevice currentDevice] orientation]: UIDeviceOrientationPortrait);
         //后端获取流的信息（字典格式）
         PLStream *stream = [PLStream streamWithJSON:dict];         
         //流 初始化
         self.streamSession = [[PLCameraStreamingSession alloc]initWithVideoCaptureConfiguration:videoCC audioCaptureConfiguration:audioCC videoStreamingConfiguration:videoSC audioStreamingConfiguration:audioSC stream:stream videoOrientation:orientation];
         //代理设置
         self.streamSession.delegate = self;
         self.streamSession.bufferDelegate = self;         
         //添加水印
         UIImage *image = [UIImage imageNamed:@"test.jpeg"];
         PLFilterHandler fitleHandler = [self.streamSession addWaterMark:image origin:CGPointMake(20, 60)];
         //在主线程中设置预览界面
         dispatch_async(dispatch_get_main_queue(), ^{

             UIView *previewView = self.streamSession.previewView;
             //根据枚举值调整预览视图的位置
             previewView.autoresizingMask = UIViewAutoresizingFlexibleHeight| UIViewAutoresizingFlexibleWidth;
             [self.view insertSubview:previewView atIndex:0];
             //缩放设置
             self.zoomSlider.minimumValue = 1;
             self.zoomSlider.maximumValue = MIN(5, self.streamSession.videoActiveFormat.videoMaxZoomFactor);
         });
     };
}

#pragma mark -销毁
- (void)dealloc {  
    dispatch_sync(self.sessionQueue, ^{
        [self.streamSession destroy];
    });
    self.streamSession = nil;
    self.sessionQueue = nil;
}
//停止推流
- (void)stopSession {
    dispatch_async(self.sessionQueue, ^{
        self.keyTime = nil;
        [self.streamSession stop];
    });
}
//开始推流
- (void)startSession {
    self.keyTime = nil;
    self.actionBtn.enabled = NO;
    dispatch_async(self.sessionQueue, ^{
        [self.streamSession startWithCompleted:^(BOOL success) {
            dispatch_async(dispatch_get_main_queue(), ^{
                self.actionBtn.enabled = YES;
            });
        }];
    });
}

//通过按钮控制开始或者停止
- (IBAction)clickAction:(id)sender {
    if (PLStreamStateConnected == self.streamSession.streamState) {
        [self stopSession];
    } else {
        [self startSession];
    }
}

3.代理和其他的方法可以参考链接：
http://blog.csdn.net/glassy_sky1207/article/details/51852245

4.纯音频推流可以在数据采集和推流是忽略相机参数

5.push URL 原因
1） 请求streamjson用的异步处理，初始化session时数据没有传输过来
2）使用了无鉴权的方式，目前ios推流只支持 static和dynamic 两种鉴权方式

6.出现URL is not authorited ,请工单提供streamjson 的数据

7.首屏秒开的设置的是默认值