如何在Swift中自动移至下一个UITextField

本文介绍了如何在Swift中自动移至下一个UITextField的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有2个具有NumberPad键盘类型的textFields

I have 2 textFields with NumberPad keyboard type

@IBOutlet weak var ourTextField: UITextField! @IBOutlet weak var forThemTextField: UITextField!

并且我想在ourTextField中输入两个数字后自动移动到另一个文本字段(从ourTextField到forThemTextField)，然后在转到另一个文本字段(forThemTextField)并输入两个数字后我希望键盘自动隐藏

and I want to automatically move to the other textfield (from ourTextField to forThemTextField) after entering two numbers inside the ourTextField then after going to the other textfield (forThemTextField) and entering 2 numbers I want the keyboard hide automatically

通过此代码，我添加了一个条件，只能在我的textFields中接受两个数字:

I have added a condition to only accept two numbers in my textFields by this code :

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { let lengthsDictionary = [ourTextField : 2, forThemTextField: 2] guard let length = lengthsDictionary[textField] else { return true } let currentCharacterCount = textField.text?.count ?? 0 if (range.length + range.location > currentCharacterCount){ return false } let newLength = currentCharacterCount + string.count - range.length return newLength <= length }

推荐答案

In viewDidLoad :- ourTextField?.addTarget(self, action: #selector(CalculatorViewController.textFieldDidChange(_:)), for: UIControlEvents.editingChanged) forThemTextField?.addTarget(self, action: #selector(CalculatorViewController.textFieldDidChange(_:)), for: UIControlEvents.editingChanged) //create function func textFieldDidChange(_ textField: UITextField) { if textField == ourTextField { if (textField.text.count)! >= 2 { forThemTextField?.becomeFirstResponder() } } else if textField == forThemTextField { if (textField.text?.count)! >= 2 { forThemTextField.resignFirstResponder() } } }