单击一个按钮，使 pickerview 出现，然后选择出现在标签中

Question

我已经将 viewcontroller 设置为有 5 个按钮、5 个标签和一个选择器视图。我希望对其进行设置，以便在单击每个按钮时，它将根据选择的按钮拉出 pickerview，然后选择的选项将显示在按钮旁边的标签中。

为了解决这个问题，我所做的是在我的 swift 文件上通过 io outlets 连接了所有按钮和标签，然后我真的不知道还能做什么那。

我研究过是否有其他指南连接按钮 + pickerview + 标签的所有三个变量，但 none 使用按钮作为触发器。

import UIKit

class CalculatorViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {

    @IBOutlet weak var firstButton: UIButton!
    @IBOutlet weak var secondButton: UIButton!
    @IBOutlet weak var thirdButton: UIButton!
    @IBOutlet weak var fourthButton: UIButton!
    @IBOutlet weak var fifthButton: UIButton!

    @IBOutlet weak var firstTextField: UITextField!
    @IBOutlet weak var secondTextField: UITextField!
    @IBOutlet weak var thirdTextField: UITextField!
    @IBOutlet weak var fourthTextField: UITextField!
    @IBOutlet weak var fifthTextField: UITextField!

    @IBOutlet weak var pickerView: UIPickerView!

    var lastPressedButton: UIButton

    override func viewDidLoad() {
        super.viewDidLoad()

        firstButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
        secondButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
        thirdButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
        fourthButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)
        fifthButton.addTarget(self, action:#selector(self.buttonClicked(:)), forControlEvents: .touchUpInside)

        self.pickerView.dataSource = self;
        self.pickerView.delegate = self;
    }

    func buttonAction(sender:UIButton!) {

        lastPressedButton = sender

        if lastPressedButton == firstButton {
            firstTextField.inputView = pickerView
        } else if lastPressedButton == secondButton {
            secondTextField.inputView = pickerView
        }
    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

        if lastPressedButton == firstButton {
            return firstButtonDataSource.count
        } else if lastPressedButton == secondButton {
            return secondButtonDataSource.count
        }
    }

    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {

        if lastPressedButton == firstButton {
            return firstButtonDataSource[row]
        } else if lastPressedButton == secondButton {
            return secondButtonDataSource[row]
        }
    }

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

        if lastPressedButton == first {
            self.firstTextField.text = firstButtonDataSource[row]
        } else if lastPressedButton == secondButton {
            self.secondTextField.text = firstButtonDataSource[row]
        }
    }
}

Answer 1

bBTN.addTarget(self, action: #selector(doSomething:), for: .touchUpInside)
// also the other buttons
@objc func doSomething(_ sender:UIButton!) {
       // check who coresponds to the sender and update the label you want
}

Answer 2

我认为您要查找的内容类似于以下内容：

更新：

class CalculatorViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {

    @IBOutlet weak var firstButton: UIButton!
    @IBOutlet weak var secondButton: UIButton!
    @IBOutlet weak var thirdButton: UIButton!
    @IBOutlet weak var fourthButton: UIButton!
    @IBOutlet weak var fifthButton: UIButton!

    @IBOutlet weak var firstTextField: UITextField!
    @IBOutlet weak var secondTextField: UITextField!
    @IBOutlet weak var thirdTextField: UITextField!
    @IBOutlet weak var fourthTextField: UITextField!
    @IBOutlet weak var fifthTextField: UITextField!

    @IBOutlet weak var pickerView: UIPickerView!

    var firstButtonDataSource = ["1", "2", "3", "4"];
    var secondButtonDataSource = ["White", "Red", "Green", "Blue"];
    var thirdButtonDataSource = ["Mike", "Steve", "Ben", "Peter"];
    var fourthButtonDataSource = ["Large", "Medium", "Small", "Extra-small"];
    var fithButtonDataSource = ["USA", "UK", "France", "Germany"];

    var lastPressedButton: UIButton?

    override func viewDidLoad() {
        super.viewDidLoad()

        firstButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
        secondButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
        thirdButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
        fourthButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)
        fifthButton.addTarget(self, action:#selector(buttonClicked(sender:)), for: .touchUpInside)

        self.pickerView.dataSource = self;
        self.pickerView.delegate = self;
    }

    @objc func buttonClicked(sender:UIButton!) {

        lastPressedButton = sender

        if lastPressedButton == firstButton {
            firstTextField.inputView = pickerView
        } else if lastPressedButton == secondButton {
            secondTextField.inputView = pickerView
        } else if lastPressedButton == thirdButton {
            thirdTextField.inputView = pickerView
        } else if lastPressedButton == fourthButton {
            fourthTextField.inputView = pickerView
        } else if lastPressedButton == fifthButton {
            fifthTextField.inputView = pickerView
        }
    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

        if lastPressedButton == firstButton {
            return firstButtonDataSource.count;
        } else if lastPressedButton == secondButton {
            return secondButtonDataSource.count;
        } else if lastPressedButton == thirdButton {
            return thirdButtonDataSource.count;
        } else if lastPressedButton == fourthButton {
            return fourthButtonDataSource.count;
        } else if lastPressedButton == fifthButton {
            return fithButtonDataSource.count;
        }

        return 0
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {

        if lastPressedButton == firstButton {
            return firstButtonDataSource[row];
        } else if lastPressedButton == secondButton {
            return secondButtonDataSource[row];
        } else if lastPressedButton == thirdButton {
            return thirdButtonDataSource[row];
        } else if lastPressedButton == fourthButton {
            return fourthButtonDataSource[row];
        } else if lastPressedButton == fifthButton {
            return fithButtonDataSource[row];
        }

        return ""
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

        if lastPressedButton == firstButton {
            self.firstTextField.text = firstButtonDataSource[row]
        } else if lastPressedButton == secondButton {
            self.secondTextField.text = secondButtonDataSource[row]
        } else if lastPressedButton == thirdButton {
            self.thirdTextField.text = thirdButtonDataSource[row]
        } else if lastPressedButton == fourthButton {
            self.fourthTextField.text = fourthButtonDataSource[row]
        } else if lastPressedButton == fifthButton {
            self.fifthTextField.text = fithButtonDataSource[row]
        }
    }
}

注意：我是在操场上做的，所以它没有经过适当的测试，但它应该为您指明正确的方向（希望如此）

单击一个按钮，使 pickerview 出现，然后选择出现在标签中

clicking on a button, to make pickerview appear, then choice appears in label

button

ios

swift

pickerview