Change Backlight Brightness on iPhone Programmatically
问题 Does the SDK provide any way to change the brightness of the backlight, or turn it off temporarily? 回答1: No. This is not available in the SDK. If it's something you think would be useful, I suggest you file an enhancement request. 回答2: I'm trying to do the same thing. As it happens there are a number posts out there in the internets with "solutions" for this. The most detailed is here This one is more succinct The problem is that I've tried these and they all rely on calling this function