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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 programmatically, and then restore it back some time later?
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Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. To find out if your PC supports this, select Settings > System > Display. Select Brightness, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature.
Method 2: Quick settings Pull down the notification tray at the top of the screen to reveal the quick settings menu. Tap the Night Light icon to turn it on. Turn Night Light on to dim your phone screen.
Fn + / (F5/F6) Press the button repeatedly to adjust the LCD brightness of your computer screen.
Edit: iOS 5 now includes a screen brightness API.
[[UIScreen mainScreen] setBrightness:0.5]; Previous answer:
No, this capability is not exposed via public APIS.
Edit: Note that a future possible iOS release may or may not have screen brightness on the multitasking bar on one particular iDevice.
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