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

Second to last line, you didn't assign the sysBright variable.

sysBright = [[NSUserDefaults standardUserDefaults] floatForKey:@"sysBright"];
[[UIScreen mainScreen] setBrightness:sysBright];