强迫在风景的照相机视图与方向锁

我正在开发一种增强现实游戏,当设备的方向锁定打开时,我遇到了摄像机视图方向的问题。

我正在使用此代码加载视图内的摄像机视图:

AVCaptureSession *session = [[AVCaptureSession alloc] init]; AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session]; captureVideoPreviewLayer.frame = self.sessionView.bounds; [self.sessionView.layer addSublayer:captureVideoPreviewLayer]; CGRect bounds=sessionView.layer.bounds; captureVideoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; captureVideoPreviewLayer.bounds=bounds; captureVideoPreviewLayer.orientation = [[UIDevice currentDevice] orientation]; captureVideoPreviewLayer.position=CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds)); AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; // device.position ; NSError *error = nil; AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error]; if ([device hasTorch]) { ([device supportsAVCaptureSessionPreset:AVCaptureSessionPreset1280x720]); } else { ([device supportsAVCaptureSessionPreset:AVCaptureSessionPreset640x480]); } [session addInput:input]; [session startRunning]; 

为了使应用程序的方向保持正确,我只选择了Xcode应用程序摘要中的那个框,其中包含:

 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return ((interfaceOrientation == UIInterfaceOrientationLandscapeRight)); } 

当设备开启方向锁定(双击主页按钮,向右滑动,点击方向图标)时,摄像机视图将显示为纵向,其余部分处于横向状态。 有没有什么办法解决这一问题? 根据我的阅读,当用户打开游戏时,无法关闭方向锁定。

您的预览图层未定位的原因是您使用了已弃用的API,而且您没有在更改设备方向时更新video方向。

  1. 删除已弃用的API,即代码中的代码

     captureVideoPreviewLayer.orientation 

    使用videoOrientation属性即

     captureVideoPreviewLayer.connection.videoOrientation 
  2. 更新shouldAutorotate中的video方向,如下所示:

     - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { if(interfaceOrientation == UIInterfaceOrientationLandscapeRight) { captureVideoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeRight } // and so on for other orientations return ((interfaceOrientation == UIInterfaceOrientationLandscapeRight)); }