UIImagePicker cameraOverlayView出现在Retake屏幕上

Question

我正在努力解决问题.我正在捕捉一个视频,我把UIImageView和UIImage放在其中作为UIImagePicker CameraOverLay.因此,当用户启动相机以捕获视频时,他可以在相机上看到叠加.当用户停止捕获并且正在移动到UIImagePicker的"取消或重新启动"屏幕时,cameraOverlayView仍然可见.

有关如何在"重拍或取消"屏幕中不显示叠加层的任何想法？

Answer 1

通过注册NSNotificationCenter解决,并收听@"_ UIImagePickerControllerUserDidCaptureItem"和@"_ UIImagePickerControllerUserDidRejectItem".

Answer 2

对于 Swift 4，它是：

    NotificationCenter.default.addObserver(forName: NSNotification.Name(rawValue: "_UIImagePickerControllerUserDidCaptureItem"), object:nil, queue:nil, using: { note in
        print("camera did capture")
    })

    NotificationCenter.default.addObserver(forName: NSNotification.Name(rawValue: "_UIImagePickerControllerUserDidRejectItem"), object:nil, queue:nil, using: { note in
        print("user pressed Retake")
    })