问题描述
我一直在尝试使用以下代码在应用程序委托方法applicationDidEnterBackground中重置用户的默认设备亮度:
I've been trying to reset the user's default device brightness in the app delegate method: applicationDidEnterBackground by using this code:
UIScreen.mainScreen().brightness = screenBrightness!
该代码被调用，但亮度未重置.任何人都知道如何使用Swift(而不是obj-c)来实现此目的
The code gets called but the brightness is not reset. Anyone know how to get this working using Swift (not obj-c)
推荐答案
此代码看起来正确，但请注意，它将在模拟器中不起作用，仅在物理设备上生效.
This code looks correct, but note that it will not work in the simulator, it will only take effect on a physical device.
此外，请确保screenBrightness的值介于0和1之间.
Also, ensure that the value of screenBrightness is between 0 and 1.
在后台时，您可能将无法更改屏幕亮度.从Apple的文档中:
You will likely not be able to change the screen brightness while in the background. From Apple's documentation:
这篇关于快速将用户重置为applicationDidEnterBackground中的默认应用亮度的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！