If I double tap the home button to bring up all the apps that are loaded on my phone and then select my app, the status bar style will be black for a second and then switch to white again.
In the info.plist
file of your app make sure to add this Status bar stytle
and View controller-basedStatus bar appearance
I found adding this also helps for the view in question.
func navigationController(navigationController: UINavigationController, willShowViewController viewController: UIViewController, animated: Bool) {
// for some reason, they thought it would be fun to switch the status bar color when this is presented, so we'll change it back.... -.-
UIApplication.sharedApplication().statusBarStyle = .LightContent
}