objective-c - AVCaptureVideoPreviewLayer方向错误

Question

我有一个奇怪的问题。我正在我的应用程序中录制视频。一切正常，直到我将设备旋转 180 度。在哪种横向模式下启动游戏并不重要，视频会正确启动，但一旦我旋转(例如从横向左向右)，视频就会开始垂直录制。我画了一张图来展示:

我正在尝试这样设置视频方向:- (BOOL)应该自动旋转{

UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
if (orientation == UIInterfaceOrientationLandscapeLeft) {
    NSLog(@"Left");
    captureVideoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeLeft;
    return YES;
}
else if(orientation == UIInterfaceOrientationLandscapeRight) {
    NSLog(@"Right");
   captureVideoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeRight;
    return YES;
}

return NO;

}但这似乎根本不起作用。我设置 captureVideoPreviewLayer.frame=self.view.bounds;还是不行

Answer 1

你的做法是正确的，但我不确定你的方向。我认为应该是

UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;

这是完整的方法，您可以通过从 shouldAutorotate 方法调用它来尝试:

- (void)autoRotateVideoOrientation {
     UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
     switch (orientation) {
        case UIInterfaceOrientationPortrait:
           captureVideoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationPortrait;
           break;
        case UIInterfaceOrientationPortraitUpsideDown:
          captureVideoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationPortraitUpsideDown;
          break;
        case UIInterfaceOrientationLandscapeLeft:
          captureVideoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeLeft;
          break;
        case UIInterfaceOrientationLandscapeRight:
          captureVideoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeRight;
          break;
        default:
          break;
   }
}