Yes, Apple will reject your app if you mess with the brightness. Although, if you still want to do it, you'd get the current brightness like this:
Code:
-(void)getBacklightLevel;{
NSNumber *bl = (NSNumber*) CFPreferencesCopyAppValue(CFSTR("SBBacklightLevel" ), CFSTR("com.apple.springboard"));
previousBacklightLevel = [bl floatValue]; //a variable to store the previous level so you can reset it.
[bl release];
}
And to set the backlight level, add this line
Code:
GSEventSetBacklightLevel(newLevel); //The new level: 0.0 - 1.0.
In order for this to work, you will need to include GraphicsServices.h. Depending on where you get your headers, you may need to add the GSEventSetBacklightLevel(float value); method to the headers, else the method won't quite work. [Some have reported kernel panics by not amending the header, but that has not been my experience]
