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);

}