1、在ViewController中操作当前ViewController的状态栏
/** 
隐藏状态栏 
*/  
override func prefersStatusBarHidden() -> Bool {  
    return true;  
}  
  
/** 
设置状态栏风格 
*/  
override func preferredStatusBarStyle() -> UIStatusBarStyle {  
    return UIStatusBarStyle.LightContent;  
}

2.在AppDelegate中设置状态栏
func setupWithStatusBar(application: UIApplication) {  
    // 设置状态栏隐藏  
    application.statusBarHidden = true;  
    application.setStatusBarHidden(true, withAnimation: UIStatusBarAnimation.Fade);  
    // 设置状态栏高亮  
    application.statusBarStyle = UIStatusBarStyle.LightContent;  
    application.setStatusBarStyle(UIStatusBarStyle.LightContent, animated: true);  
}