如何将值从弹出视图控制器传递到上一个视图控制器? [英] How to pass values from a Pop Up View Controller to the Previous View Controller?

问题描述

所以在我的1stViewController中，我有以下代码:

So In my 1stViewController I have this code:

@IBAction func colorDropdown(_ sender: Any) {
    self.popUpColorPicker()
}

func popUpColorPicker() {
    let popOverVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ColorPicker") as! ColorPicker
    self.addChildViewController(popOverVC)
    popOverVC.view.frame = self.view.frame
    self.view.addSubview(popOverVC.view)
    popOverVC.didMove(toParentViewController: self)
}

哪个会弹出2ndViewController.关闭弹出式2ndViewController后，我想检索输入的值并在我的第一个视图控制器中使用它.

Which would pop up the 2ndViewController. Upon dismissing the Pop Up 2ndViewController, I'd like to retrieve the values I entered and use it in my 1st View Controller.

推荐答案

您可以使用delegate或completion handler来实现.

只需创建一个委托来处理有关关闭second VC的数据.

Just create a delegate to handle your data on dismissing the second VC.

**

**

写一个completion handler closure以在您的第一个view controller中取回那些值.

Write a completion handler closure to get back those values in your first view controller.

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