cdcyd / cccamera Goto Github PK

`// 当前设备取向

• (AVCaptureVideoOrientation)currentVideoOrientation{
  AVCaptureVideoOrientation orientation;
  switch (self.motionManager.deviceOrientation) {
  case UIDeviceOrientationPortrait:
  orientation = AVCaptureVideoOrientationPortrait;
  break;
  case UIDeviceOrientationLandscapeRight:
  orientation = AVCaptureVideoOrientationLandscapeLeft;
  break;
  case UIDeviceOrientationPortraitUpsideDown:
  orientation = AVCaptureVideoOrientationPortraitUpsideDown;
  break;
  default:
  orientation = AVCaptureVideoOrientationLandscapeRight;
  break;
  }
  return orientation;
  }`

为什么默认是AVCaptureVideoOrientationLandscapeRight ，有点不理解，帮忙解释下，谢谢

提2个小问题，
1.在设置自动聚焦和曝光的设置point代码应该放置在设置mode前面：
if (canResetFocus) {
device.focusPointOfInterest = point;
device.focusMode = focusMode;
}
if (canResetExposure) {
device.exposurePointOfInterest = point;
device.exposureMode = exposureMode;
}

2.开始录制时，应该把_recording = YES；放在最后，否则可能会出现提前先写入再删除文件的情况：

_movieManager.currentDevice = [self activeCamera];
_movieManager.currentOrientation = [self currentVideoOrientation];
[_movieManager start:^(NSError * _Nonnull error) {
    if (error) {
            [self.view showError:error];
    }else{
            dispatch_sync(dispatch_get_main_queue(), ^{
                self->_recording = YES;
            });
    }
}];