Swift:将数据从 View Controller 传递到导航 Controller

Question

我想将数据从一个 View Controller 传递到另一个 View Controller ，但我在它们之间有一个导航 Controller ，所以有一个“present”函数而不是“performSegue”。

 private func IniciarMainAdmin(){
    let mainAdmin = UIStoryboard(name: "Main", bundle: Bundle.main)
    guard let mainAdminNVC = mainAdmin.instantiateViewController(withIdentifier: "NCMainAdmin") as? NCMainAdmin else{
        return
    }
    present(mainAdminNVC, animated: true, completion: nil)
}

我试过这段代码，但它对我不起作用:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        let destViewController = segue.destination as! NCMainAdmin
        let secondViewcontroller = destViewController.viewControllers.first as! NCMenuAdmin
        secondViewcontroller.adminUserData = "This is a test"
}

注意事项:

• NCMainAdmin 是导航 Controller
• NCMenuAdmin 是 Navigation Controller 的第一个 View Controller

谢谢!

Answer 1

对于你的代码prepare(for to trigger，你需要创建一个从sender vc到navigation的segue，所以要么

 private func IniciarMainAdmin(){
    let mainAdmin = UIStoryboard(name: "Main", bundle: Bundle.main)
    guard let mainAdminNVC = mainAdmin.instantiateViewController(withIdentifier: "NCMainAdmin") as? NCMainAdmin else{
        return
    }
    let first = mainAdminNVC.viewControllers.first as! NCMenuAdmin
    first.adminUserData = "This is a test"
    present(mainAdminNVC, animated: true, completion: nil)
}

或

self.performSegue(withIdentifier:"id",sender:nil)

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        let destViewController = segue.destination as! NCMainAdmin
        let secondViewcontroller = destViewController.viewControllers.first as! NCMenuAdmin
        secondViewcontroller.adminUserData = "This is a test"
}