如何在iOS 5应用程序中更改亮度？ [英] How to change brightness in iOS 5 app?

问题描述

我如何编写在应用程序中更改亮度的功能？我知道它可能，因为我已经看到至少有三个应用程序可以做到这一点。这对我的应用程序非常有用。我知道它只能在iOS 5中使用UIScreen类，但我不知道如何编程。请帮助我！

How would I program the ability to change brightness in-app? I know that its possible as I have seen at least three apps that can do it. This would be very useful for my app. I know that it's only possible in iOS 5 with the UIScreen Class, but I have no idea how to program it. Please help me!

推荐答案

UIScreen 类有一个新的名为<$ c $的属性c>亮度 。

The UIScreen class has a new property called brightness.

此外，还有另一个名为 wantSoftwareDimming （当设置为 YES 时）允许您低于硬件支持的最低亮度，因为屏幕上会覆盖一个特殊的调光视图以使事情变暗

In addition, there's another property called wantsSoftwareDimming that (when set to YES) allows you to go below the lowest brightness supported by the hardware, because a special "dimming view" is overlaid over the screen to darken things even further.

亮度属性从 0 到 1 。所以：

• wantsSoftwareDimming 设置为否（默认值），亮度 0 表示硬件支持的最黑暗和亮度 1 表示硬件支持最亮。


• with wantsSoftwareDimming 设置为 YES ，亮度 0 表示最黑暗的硬件通过覆盖调光视图支持PLUS变暗，以及亮度 1 仍然意味着最聪明的硬件支持。

• with wantsSoftwareDimming set to NO (the default), a brightness of 0 means "the darkest the hardware supports" and a brightness of 1 means "the brightest the hardware supports".
• with wantsSoftwareDimming set to YES, a brightness of 0 means "the darkest the hardware supports PLUS darkening by overlaying a dimming view", and a brightness of 1 still means "the brightest the hardware supports".

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