ios - 如何将数据从父 View Controller 传递到子容器 View Controller

Question

我正在尝试使用容器将数据从 ParentVC 发送到 childVC。该容器未嵌入，因为它在我的应用程序中多次使用，因此我无法使用 prepareForSegue。我在 ViewDidLoad 中实例化 containerVC。如何在加载时将数据传递给 containerVC？我已经看到了从 child 到 parent 的答案，但不是这样。提前感谢您的帮助。

import UIKit

class ParentVC: UIViewController {

    @IBOutlet var containerView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let childVC = storyboard!.instantiateViewController(withIdentifier: "ChildVC") as! ChildVC
        addChild(childVC)
        childVC.view.autoresizingMask = [.flexibleHeight, .flexibleWidth]
        childVC.view.frame = containerView.bounds
        containerView.addSubview(childVC.view)
        childVC.didMove(toParent: self)

        // pass values to child
        childVC.boolVariable = true // THIS DOESN'T WORK. HOW TO PASS DATA TO THE CHILD?
    }
 }

Answer 1

你可以早点尝试

let childVC = storyboard!.instantiateViewController(withIdentifier: "ChildVC") as! ChildVC
childVC.boolVariable = true