问题
I'm developing an application for a school that I work at. Currently I am having issues with changing the status bar text from it's default state of black to white so we can actually read it!
I have tried everything i've found here and on the dev forums, including calling View controller-based status bar appearance = "NO"
and also [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

回答1:
I just fixed this issue in one of my apps. Implement this in your UIViewController:
- (UIStatusBarStyle)preferredStatusBarStyle
{
return UIStatusBarStyleLightContent;
}
Or choose another UIStatusBarStyle
value that you need.
回答2:
You can use this in your AppDelegate:
[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleLightContent;
回答3:
Here is a solution for your problem: How to change Status Bar text color in iOS 7.
来源:https://stackoverflow.com/questions/18977160/change-status-bar-text-colour-from-white-ios-7-xcode-5