如何在 iOS 5 应用程序中更改亮度？
我如何编程改变应用程序内的亮度？我知道这是可能的，因为我已经看到至少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。我知道这只能在 iOS 5 中通过 UIScreen 类实现，但我不知道如何对其进行编程。请帮我！
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!
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（4）
UIScreen类有一个新的 名为brightness的属性。此外，还有另一个名为
wantsSoftwareDimming的属性（当设置为YES时）允许您低于硬件支持的最低亮度，因为特殊的“调光视图”是覆盖在屏幕上使事物进一步变暗。brightness属性采用从0到1的浮点数。因此：wantsSoftwareDimming设置为NO（默认值）时，亮度为0表示“硬件中最暗的”支持”，亮度为1表示“硬件支持的最亮”。wantsSoftwareDimming设置为YES时，亮度为0表示“硬件支持的最暗值，并且通过覆盖调光视图”，亮度为1仍然意味着“硬件支持的最亮”。The
UIScreenclass has a new property calledbrightness.In addition, there's another property called
wantsSoftwareDimmingthat (when set toYES) 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.The
brightnessproperty takes a float from0to1. So:wantsSoftwareDimmingset toNO(the default), abrightnessof0means "the darkest the hardware supports" and abrightnessof1means "the brightest the hardware supports".wantsSoftwareDimmingset toYES, abrightnessof0means "the darkest the hardware supports PLUS darkening by overlaying a dimming view", and abrightnessof1still means "the brightest the hardware supports".我从未尝试过，但查看文档应该是这样的：
I have never tried it, but looking at the docs it should go like this:
正如其他人指出的那样，您可以使用
但是要非常小心，因为您会遇到问题（根据这里的经验进行讨论）
看看这个：
IOS5 setBrightness 不适用于 applicationWillResignActive
还有这个：
任何人都能够使用[[UIScreen mainScreen] setBrightness] 在后台/退出？
（我希望我有，当我发现这个线程/答案时）:-(
As others pointed out you can use
BUT be very careful because you will run into problems (talking from experience here)
look at this:
IOS5 setBrightness didn't work with applicationWillResignActive
and this:
Anyone been able to use [[UIScreen mainScreen] setBrightness] on background / exit?
(I wish I had, when I discovered this thread/answer) :-(
您可以使用以下两者之一：
[[UIScreen mainScreen]setBrightness:1.0];GSEventSetBacklightLevel(0.5f);但这是一个私有 API 调用，如果您使用它，您的应用程序肯定会被拒绝。You can use either of these two:
[[UIScreen mainScreen]setBrightness:1.0];GSEventSetBacklightLevel(0.5f);But this is a private API call, if you use it, your application will surely be rejected.