Change Backlight Brightness on iPhone Programmatically

Question

Does the SDK provide any way to change the brightness of the backlight, or turn it off temporarily?

Answer 1

-(void)changeLight{

    GSEventSetBacklightLevel(float number);//number between 0.0 - 1.0
}

call the above method using

[self performSelector:@selector(changeLight) withObject:nil afterDelay:0.0];

you can add the private framework by just drag and drop to your xcode project from /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk/System/Library/PrivateFrameworks/GraphicsServices.framework.

Also add #import "GraphicsServices.h" header in your .h file..remember: since you are using private framework you application will reject in app store push