从popoverPresentationController导航到新的ViewController

Question

我有两个viewCcontroller，FirstViewController和SecondViewController。现在我在FirstViewController中显示一个popoverpresentationcontroller，它有一个按钮，有几个textFields，用户可以输入。现在，一旦单击按钮，我想将其导航到SecondViewController并传递数据。但是我无法导航到第二个视图控制器。如果我使用来自popoverpresentationcontroller按钮的segue到SecondViewController它成功导航，但我想以编程方式实现。有关如何做到这一点的任何帮助??

这是我的按钮点击代码

@IBAction func goTo(_ sender: UIButton) {

  let storyBoard = UIStoryboard(name: "Main", bundle: nil)
  let destination = storyBoard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
            destination.flag = flag
             sender: sender)


        self.navigationController?.pushViewController(destination, animated: true)

        }
    }

}

Answer 1

由于呈现的视图控制器上没有navigation controller，您无法导航

首先，您必须添加navigation controller，然后才能执行导航。

let nav1 = UINavigationController()
nav1.viewControllers = [self]
nav1.pushViewController(child, animated: true)

Answer 2

我只是稍微清理你的代码。

@IBAction func goTo(_ sender: UIButton) {    
    let destinationViewController = storyboard?.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
    destinationViewController.flag = flag
    self.navigationController?.pushViewController(destinationViewController, animated: true)
}

  

请注意在Main.storyboard中设置viewController