applicationWillResignActive and setBrightness not working?

Question

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

The following steps work with my app:

1. Act

Answer 1

When you tap the home button your application doesn't resign active but rather goes into "Background Mode" and has its own delegate method which you need to define:

- (void)applicationDidEnterBackground:(UIApplication *)application

Something like this (in addition to the applicationDidBecomeActive: delegate method) should get the intended behavior:

- (void)applicationDidEnterBackground:(UIApplication *)application
{        
    sysBright = [[NSUserDefaults standardUserDefaults] floatForKey:@"sysBright"];
    [[UIScreen mainScreen] setBrightness:sysBright]; 
}