在iOS 9中已弃用setStatusBarHidden（_：withAnimation :)

参考

preferredStatusBarUpdateAnimation

Gif

码

class ViewController: UIViewController {    var isHidden:Bool = false{        didSet{ UIView.animate(withDuration: 0.5) { () -> Void in     self.setNeedsStatusBarAppearanceUpdate() }}    }    @IBAction func clicked(sender: AnyObject) {        isHidden = !isHidden    }    override var preferredStatusBarUpdateAnimation: UIStatusBarAnimation{        return .slide    }    override var prefersStatusBarHidden: Bool{        return isHidden    } }