I'm trying to change the style of statusBar, and I tried to use the following code:
override func viewWillAppear(animated: Bool) {
    //1
    UIApplication.sharedApplication().statusBarStyle = UIStatusBarStyle.LightContent
    //2
    self.setStatusBarStyle(UIStatusBarStyle.LightContent)
    //3
    if self.respondsToSelector(#selector(setNeedsStatusBarAppearanceUpdate)){
        self.setNeedsStatusBarAppearanceUpdate()
    }
}
But this doesn't work, can anyone help me out.
 
     
     
    