- (IBAction)Slider:(id)sender {
[[UIScreen mainScreen] setBrightness: mSlider.value];
}
- (IBAction)Stepper:(id)sender {
[[UIScreen mainScreen] setBrightness:[(UIStepper *)sender value]];
代码 调节屏幕亮度
原文：http://www.cnblogs.com/iOS-mt/p/4245000.html
