For iOS 10 SDK, when I try to set cameraFlashMode of an instance UIImagePickerController, the cameraFlashMode will alway be UIImagePickerControllerCameraFlashModeOff. I think this is a bug.
Demo can be obtained here:
https://github.com/acn001/iOS10UIImagePickerContollerDemo.git
PS: my device is iPhone 6S Plus, OS version is iOS 10 beta 8, and Xcode version is Xcode 8 beta 6.