Is there a way of adjusting the screen brightness programmatically?

Question

I have an iPhone app for photographic purposes (kind of a lightbox). This app needs as much brightness as possible. Is there a way to change the screen brightness programmat

Answer 1

Here's a Swift answer to this question.

import UIKit
extension UIScreen
{
    static func setMainBrightness(brightness: CGFloat)
    {
        guard (0...1).contains(brightness) else
        {
            print("Attempt to set the screen brightness to an invalid value: \(brightness) should be between 0 and 1 inclusive.")
            return
        }
        self.main.brightness = brightness
    }
}

Call it by using:

UIScreen.setMainBrightness(0.5)

Or ignore my extension (which I just wrote to illustrate the limits) and just call:

UIScreen.main.brightness = 0.5