跟踪哪个 UITextField 当前处于编辑模式

Posted 2023-03-15

【中文标题】跟踪哪个 UITextField 当前处于编辑模式

【英文标题】：Keep track of which UITextField is currently in editing mode

【发布时间】：2019-11-25 14:01:55

【问题描述】：

在下面的代码中，当inputFieldOne 处于编辑模式时，我有几个按钮显示为inputAccessoryView，当您点击First Button 时，它会在inputFieldOne 中输入ONE，当我点击Second Button 时它在inputFieldOne 中输入TWO。它按预期工作，但我希望能够在多个UITextFields 中重复使用这些按钮。换句话说，如果我有另一个名为inputFieldTwo 的UTTextField，我希望能够在这些按钮被点击时输入它们的值。

如何跟踪 UITextField 当前处于编辑模式的内容，以便我可以附加按钮中的值？

@IBOutlet weak var inputFieldOne: UITextField!
@IBOutlet weak var inputFieldTwo: UITextField!

override func viewWillAppear(_ animated: Bool) 
    super.viewWillAppear(animated)
    addButtonsToKeyboard()


func addButtonsToKeyboard()
    // First button
    let button1 = UIButton()
    button1.setTitle("First Button", for: UIControl.State())
    button1.addTarget(self, action: #selector(buttonKeyPress), for: UIControl.Event.touchUpInside)
    let barButton1 = UIBarButtonItem()
    barButton1.customView = button1

    // Second button
    let button2 = UIButton()
    button2.setTitle("Second Button", for: UIControl.State())
    button2.addTarget(self, action: #selector(buttonKeyPress), for: UIControl.Event.touchUpInside)
    let barButton2 = UIBarButtonItem()
    barButton2.customView = button2

    /// UIToolbar.
    let toolBar = UIToolbar()
    toolBar.tintColor = UIColor.blue
    toolBar.barTintColor = UIColor.red

    toolBar.items = [barButton1, barButton2]
    toolBar.sizeToFit()

    inputFieldOne.inputAccessoryView = toolBar


@objc func buttonKeyPress(_ sender: UIButton)

    switch sender.currentTitle!
    case "First Button":
        inputFieldOne.text = "ONE"
    case "Second Button":
        inputFieldOne.text = "TWO"
    default: break
    

【参考方案1】：

有很多方法可以使其可重复使用，因为我的时间非常有限，所以我建议你可以使用 Extension

你可以为你所有的文本字段使用它

所以这里是sn-p的代码：

    extension UITextField

    // you can pass here array of UIbarbutton also
    func addButtonsToKeyboard()
        // First button
        let button1 = UIButton()
        button1.setTitle("First Button", for: UIControl.State())
        button1.addTarget(self, action: #selector(buttonKeyPress), for: UIControl.Event.touchUpInside)
        let barButton1 = UIBarButtonItem()
        barButton1.customView = button1

        // Second button
        let button2 = UIButton()
        button2.setTitle("Second Button", for: UIControl.State())
        button2.addTarget(self, action: #selector(buttonKeyPress), for: UIControl.Event.touchUpInside)
        let barButton2 = UIBarButtonItem()
        barButton2.customView = button2

        /// UIToolbar.
        let toolBar = UIToolbar()
        toolBar.tintColor = UIColor.blue
        toolBar.barTintColor = UIColor.red

        toolBar.items = [barButton1, barButton2]
        toolBar.sizeToFit()

        self.inputAccessoryView = toolBar
    
    @objc func buttonKeyPress(_ sender: UIButton)

        switch sender.currentTitle!
        case "First Button":
            self.text = "ONE"
        case "Second Button":
            self.text = "TWO"
        default: break
        
    

您可以使用文本字段对象添加以下代码

txtSwift.addButtonsToKeyboard()

希望对你有帮助！！！