applicationWillResignActive和setBrightness不起作用？

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问题描述

我使用[[UIScreen mainScreen] setBrightness：]（在sdk 5.0中）来更改我的应用程序中的系统背景灯。

I use [[UIScreen mainScreen]setBrightness: ] (in sdk 5.0) to change the system background light in my app.

以下步骤与我的应用程序配合使用：

The following steps work with my app:

激活该应用，将系统亮度设为默认值，然后另存为sysBright。

Active the app, get the system brightness as default, then save as sysBright.

使用我的应用更改亮度，更改亮度，然后另存为appBright。

Change the brightness with my app, changed brightness, then save as appBright.

ResignActive应用程序使用主页按钮或锁定按钮，将亮度设置为sysBright（步骤1值，系统默认亮度）。

ResignActive app with home button or lock button, set brightness to sysBright (step 1 value, system default brightness).

再次启用应用程序。然后，将重复上述步骤1到3。

Active app again. Then it will repeat the above steps form 1 to 3.

步骤3出现错误，当我停用应用程序与锁定按钮，函数applicationWillResignActive工作正常，它可以恢复亮度值（sysBright）。

Something is wrong with step 3, when I inactivate the app with the lock button, the function applicationWillResignActive works well, it can restore the brightness value (sysBright).

但是当我按主页按钮，它不工作再说了亮度仍然是我在应用程序中改变的价值。（appBright）

But when I press the home button, it doesn't work anymore. The brightness is still the value I changed in my app. (appBright)

有人有任何想法吗？感谢任何帮助〜

Does anyone have any idea about it? Thanks for any help ~

这是代码：

float appBright,sysBright;

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    sysBright = [[UIScreen mainScreen] brightness];
    [[NSUserDefaults standardUserDefaults] setFloat:sysBright forKey:@"sysBright"];

    [[UIScreen mainScreen] setBrightness:appBright];
}

//doesn't work when i ResignActive with the home button
- (void)applicationWillResignActive:(UIApplication *)application
{
    [[NSUserDefaults standardUserDefaults] floatForKey:@"sysBright"];
    [[UIScreen mainScreen] setBrightness:sysBright];
}

我错过了什么？

WillResignActive和setBrightness不起

问题描述

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