UIImagePickerControllercameraViewTransform 在 iOS 10 中不起作用

我已经在我的应用程序中实现了相机覆盖视图。相机覆盖视图在 iOS 9 中工作良好。但 iOS 10cameraViewTransform 无法工作如何解决此问题。请指导我。谢谢

我的工作代码

CGSize screenBounds = [UIScreen mainScreen].bounds.size;
CGFloat cameraAspectRatio = 4.0f/3.0f;
CGFloat camViewHeight = screenBounds.width * cameraAspectRatio;
CGFloat scale = screenBounds.height / camViewHeight;
picker.cameraViewTransform = CGAffineTransformMakeTranslation(0, (screenBounds.height - camViewHeight) / 2.0);
picker.cameraViewTransform = CGAffineTransformScale(picker.cameraViewTransform, scale, scale);

update

OverlayView *overlay = [[OverlayView alloc]
                            initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
    picker =
    [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    picker.showsCameraControls = NO;
    picker.navigationBarHidden = NO;
    picker.toolbarHidden = YES;

    // Device's screen size (ignoring rotation intentionally):
    CGSize screenSize = [[UIScreen mainScreen] bounds].size;

    float cameraAspectRatio = 4.0 / 3.0;
    float imageWidth = floorf(screenSize.width * cameraAspectRatio);
    float scale = ceilf((screenSize.height / imageWidth) * 10.0) / 10.0;





     picker.cameraViewTransform = CGAffineTransformScale(CGAffineTransformIdentity, 2, 2);
   picker.cameraOverlayView = overlay;
    picker.allowsEditing = NO;

    UIPinchGestureRecognizer *pinchRec = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(zoom:)];
    [overlay addGestureRecognizer:pinchRec];
    overlay.image =image;
    [self.navigationController presentViewController:picker animated:NO completion:nil];

iOS 10.2 修复了这个问题！您现在可以使用cameraViewTransform再次呈现相机之前的属性。