屏幕共享demo能够在iPhone手机启动,但是没有数据传输

好的

我根据这个swift的demo只做了 uplodaer的修改 变成OC的,然后使用屏幕共享的时候发现延迟很高,有时候画面还会变形 需要做什么处理么

(void)sendVideoBuffer:(CMSampleBufferRef)sampleBuffer{
    CVPixelBufferRef _Nullable videoFrame =
    CMSampleBufferGetImageBuffer(sampleBuffer);
    if (videoFrame) {
        
    }else{
        return;
    }
    int rotain  = 0;
 
    if (@available(iOS 11.0, *)) {
        CFStringRef RPVideoSampleOrientationKeyRef = (__bridge CFStringRef)RPVideoSampleOrientationKey;
        NSNumber *orientation = (NSNumber *)CMGetAttachment(sampleBuffer, RPVideoSampleOrientationKeyRef,NULL);
        if (orientation.integerValue == kCGImagePropertyOrientationUp || orientation.integerValue == kCGImagePropertyOrientationUpMirrored) {
            rotain = 0;
        }else if(orientation.integerValue == kCGImagePropertyOrientationDown || orientation.integerValue == kCGImagePropertyOrientationDownMirrored){
            rotain = 180;
        }else if (orientation.integerValue == kCGImagePropertyOrientationLeft || orientation.integerValue == kCGImagePropertyOrientationLeftMirrored){
            rotain = 90;
        }else if (orientation.integerValue == kCGImagePropertyOrientationRight ||orientation.integerValue == kCGImagePropertyOrientationRightMirrored){
            rotain = 270;
        }
        CMTime time = CMSampleBufferGetPresentationTimeStamp(sampleBuffer);
        AgoraVideoFrame *frame = [[AgoraVideoFrame alloc] init];
        frame.format = 12;
        frame.time = time;
        frame.textureBuf = videoFrame;
        frame.rotation = rotain;
        [[self sharedAgoraEngine] pushExternalVideoFrame:frame];
    } else {
        // Fallback on earlier versions
    }
    

}