设置下一个按钮和完成按钮，而不是在键盘 swift 4 中返回

Posted 2023-03-10

【中文标题】设置下一个按钮和完成按钮，而不是在键盘 swift 4 中返回

【英文标题】：set next Button & Done Button instead of return in keyboard swift 4

【发布时间】：2018-10-30 10:24:55

【问题描述】：

https://i.stack.imgur.com/yNZh1.gif

当键盘出现在工具栏中时，我需要下一个按钮、上一个按钮和完成按钮 我已经实现了这段代码...

导入 UIKit

类 ViewController: UIViewController,UITextFieldDelegate

@IBOutlet weak var textfieldOne: UITextField!
@IBOutlet weak var textFieldTwo: UITextField!
@IBOutlet weak var textFieldThree: UITextField!

override func viewDidLoad() 
    super.viewDidLoad()



func setAccessoryViewFor(textField : UITextField)   
    let toolBar = UIToolbar()
    toolBar.barStyle = .default
    toolBar.isTranslucent = true
    toolBar.sizeToFit()

    // Adds the buttons

    // Add previousButton
    let prevButton = UIBarButtonItem(title: "<", style: .plain, target: self, action: #selector(previousPressed(sender:)))
    prevButton.tag = textField.tag
    if getPreviousResponderFor(tag: textField.tag) == nil 
        prevButton.isEnabled = false
    

    // Add nextButton
    let nextButton = UIBarButtonItem(title: ">", style: .plain, target: self, action: #selector(nextPressed(sender:)))
    nextButton.tag = textField.tag
    if getNextResponderFor(tag: textField.tag) == nil 
        nextButton.title = "Done"
    

    let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
    toolBar.setItems([prevButton,spaceButton,nextButton], animated: false)
    toolBar.isUserInteractionEnabled = true
    textField.inputAccessoryView = toolBar




@objc func nextPressed(sender : UIBarButtonItem) 
    if let nextResponder = getNextResponderFor(tag: sender.tag) 
        nextResponder.becomeFirstResponder()
     else 
        self.view.endEditing(true)
    



@objc func previousPressed(sender : UIBarButtonItem) 
    if let previousResponder = getPreviousResponderFor(tag : sender.tag)  
        previousResponder.becomeFirstResponder()
    


func getNextResponderFor(tag : Int) -> UITextField? 
    return self.view.viewWithTag(tag + 1) as? UITextField


func getPreviousResponderFor(tag : Int) -> UITextField? 
    return self.view.viewWithTag(tag - 1) as? UITextField

请任何人帮忙...

【参考方案1】：

您可以注册键盘出现/消失事件，并可以在其顶部添加带有next 和back 按钮的UIToolBar。或者，只需集成 this 库，几行代码就完成了。