Question

The Camera app persists settings for the user as to whether the flash is off / on / auto (and stuff like is HDR enabled). Is there a way to read these settings so that I can have my app (which has custom camera UI) default to the last known user’s preference?

Answer 1

Not 100% sure here but if you look at the UIImagePickerController documentation you will see there is an API for cameraFlashMode. I am not positive if it is a readable property but if it is, that has 3 values of:

enum {
   UIImagePickerControllerCameraFlashModeOff  = -1,
   UIImagePickerControllerCameraFlashModeAuto = 0,
   UIImagePickerControllerCameraFlashModeOn   = 1
};
typedef NSInteger UIImagePickerControllerCameraFlashMode;

So you can just check the values of it and then do whatever you want in your app accordingly.