Adjust the main screen brightness using Swift

问题:

I would like to adjust the iPhone's main screen brightness in code using Swift.

I know in Objective-C it can be done by:

[[UIScreen mainScreen] setBrightness:0.5];

How do I do this in Swift?

回答1:

https://developer.apple.com/documentation/uikit/uiscreen/1617830-brightness

From the docs the proper answer for Swift 3+ is:

UIScreen.main.brightness = CGFloat(0.5)

回答2:

Actually in Swift 3 mainScreen was replaced with main, so proper code is:

UIScreen.main.brightness = CGFloat(0.5)