swift 延迟跳转到对应的页面

     //两秒之后进行

            let time: TimeInterval = 2.0

            DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + time) {

                let controller = (self.navigationController?.viewControllers[1])!

                self.navigationController?.popToViewController(controller, animated: true)

            }