如何在父视图控制器和子视图控制器之间传输数据 [英] How to transfer data between Parent and Child View Controllers

问题描述

我曾尝试寻找类似问题的答案，但是我并不是特别有经验，并且在遵循这些问题时遇到了麻烦，因此，我们将不胜感激！我的情况如下:当我在Parent ViewController中按下一个按钮时，以下代码用于调用Child ViewController(顺便说一句，Child实际上是一个TableViewController，但似乎正常"运行正常，这很正常ViewController?):

I have tried looking at answers on similar questions to this, but I am not particularly experienced and have had trouble following them, so any help would be much appreciated! My situation is as follows: when I press a button in my Parent ViewController, the following code is used to call a Child ViewController (by the way, the Child is actually a TableViewController, but it seems to work fine "thinking" it's a normal ViewController?):

controller = (storyboard?.instantiateViewController(withIdentifier: "People"))
addChildViewController(controller!)
controller?.view.frame = CGRect(x: 10, y: 200, width: 394, height: 300)
self.view.addSubview((controller?.view)!)
controller?.didMove(toParentViewController: self)

然后我想要将一个数组从父对象传输到子对象，并将其用作TableView的数据吗?

What I would then like is to transfer an array from the Parent to the Child, where it will be used as the TableView's data?

第二，当我从子代的TableView中选择一个单元格时，我希望将相关信息发送给父代，并让子代消失.
如果有兴趣，我可以使用以下方法在不同情况下(显示孩子"时在父级中单击时)关闭孩子":

Secondly, when I select a cell from the Child's TableView, I would like the relevant information to be sent to the Parent, and for the Child to disappear.
In case it is of interest, I have managed to close the Child under different circumstances (when a click occurs in the Parent while the Child is displayed) using the following:

controller?.willMove(toParentViewController: nil)
controller?.view.removeFromSuperview()
controller?.removeFromParentViewController()

我非常感谢您提供任何建议，即使它是一些有用的链接！

I would really appreciate any advice, even if it's a link to something which would help!

推荐答案

尝试一下.

首先创建用于添加和删除childVC的公共方法.

First Create Public Method For Add And Remove childVC.

用于添加childVC.

public class func openChildViewController(parentVC:UIViewController, with childVC:UIViewController){

        parentVC.addChildViewController(childVC)
        childVC.view.frame = parentVC.view.frame
        parentVC.view.addSubview(childVC.view)
        parentVC.didMove(toParentViewController: childVC)
    }

用于删除childVC.

   public class func removeChildViewController(childVC:UIViewController){

        childVC.willMove(toParentViewController: nil)
        childVC.view.removeFromSuperview()
        childVC.removeFromParentViewController()
    }

使用上述方法.

1.ParentVC.swift

class ParentVC: UIViewController , ChildVCDelegate  {

     var arrType = NSMutableArray()

    //add ChildVC
    @IBAction func btnAddChildVC(_ sender: UIButton) {
        let ChildVC = self.storyboard?.instantiateViewController(withIdentifier: "ChildVC") as! ChildVC
        PickerVC.arrPass = arrType //for data passing create any object in ChildVC for ex. arrPass is NSMutableArray
        ChildVC.delegate = self
        openChildViewController(parentVC: self, with: ChildVC)
    }

     // MARK: ChildVC Delegate
   func SetSelectedPickerValue(strSelectOption: String) {
                print(strSelectOption)
        }
    }

}

2.ChildVC.swift

class ChildVC: UIViewController{

    // MARK: Variable for ParentVCData Passing
     var arrPass = NSMutableArray()

    override func viewWillAppear(_ animated: Bool) {
        print(arrPass)
    }

    //Remove ChildVC
    @IBAction func btnRemoveChildVC(_ sender: UIButton) {
        self.delegate?.SetSelectedPickerValue!(strSelectOption: "any String you pass ChildVC To ParentVC")
        removeChildViewController(childVC: self)
    }
}
// MARK: Create Delegate Method
@objc protocol ChildVCDelegate{
     @objc optional func SetSelectedPickerValue(strSelectOption:String)
}

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