在视图控制器之间传递数据使用从导航控制器中嵌入的视图到tabbarcontroller的segue

Question

我有两个视图,我想将数据从一个视图传递到下一个视图.第一个视图是我有数据,我想传递给下一个视图让我们调用它SourceViewController.但是SourceViewController嵌入在a NavigationViewController和secondViewController让我们调用它DestinationViewController是一个中的firstView TabViewController.

我试图使用这个问题的答案,它无法通过导航视图,它只是跳过整个逻辑.

这是我的代码:

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if (segue.identifier == "loginSuccessSugue") {

        if let tab = self.presentingViewController as? UITabBarController,
            let nav = tab.viewControllers?[0] as? UINavigationController,
            let destinationVC = nav.viewControllers.first as? HomeViewController {


             destinationVC.currentBalance = serviceBalance
        }

    }
}

这是HomeViewController:

class HomeViewController: UIViewController , UITableViewDelegate,UITableViewDataSource, UICircularProgressRingDelegate{

var currentBalance = 0.0

 override func viewDidLoad() {
    super.viewDidLoad()

    circularBalance.maxValue = CGFloat(currentBalance)
     print(currentBalance)

   }

  override func viewDidAppear(_ animated: Bool) {
    print(currentBalance)
    circularBalance.setProgress(value: CGFloat(currentBalance), animationDuration: 3)

     }
}

这就是故事板的样子:

Answer 1

这是我的视图控制器，您可以在其中检查我是否将 5 发送到 tabbar 第一个视图控制器：

   class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        self.performSegue(withIdentifier: "segueIdentifier", sender: self)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        let barViewControllers = segue.destination as! UITabBarController
        let destinationNv = barViewControllers.viewControllers?[0] as! UINavigationController
        let destinationViewController = destinationNv.viewControllers[0] as! FirstViewController
        destinationViewController.currentBalance = 5
    }
}

现在您可以检查我的 firstview 控制器，您可以在其中检查我们获得的价值。

class FirstViewController: UIViewController {

    var currentBalance = 0
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        print(currentBalance)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

现在，您可以检查我的控制台和故事板：