实现先pop后push的效果，如支付成功后的界面

Posted 2020-09-24 heyode

 let new = WebViewController()

            let vcArr = NSMutableArray.init(array: (self.navigationController?.viewControllers)!)
            vcArr.remove(self)
            vcArr.add(new)
            self.navigationController?.setViewControllers(vcArr as! [UIViewController], animated: true)