Is there a way to adjust the torch/flash brightness level on an iOS device?

Question

I've read plenty of topics on adjusting the screen brightness but is it possible to do the same with the flash or is it a binary on/off?

Answer 1

In IOS 6+, you can.

[myAVCaptureDevice setTorchModeOnWithLevel:0.5 error:NULL]; <== range is (0,1.0] (don't send 0)

You can enumerate the av capture devices like so:

NSArray * devices = [AVCaptureDevice devices];

and determine which have torches (i.e. not microphones :):

myAVCaptureDevice.hasTorch

http://developer.apple.com/library/ios/#documentation/AVFoundation/Reference/AVCaptureDevice_Class/Reference/Reference.html