如何在ios中结合密码点和普通文本生成UITextField

您必须使用以下方法检查文本字段中的每个文本条目

- (BOOL)textField:(UITextField *)textField
    shouldChangeCharactersInRange:(NSRange)range
                replacementString:(NSString *)string

此方法。在输入特定数量的条目后,您就可以在密码中添加-了。

您可以这样实现它。

将变量声明为textCount

 var textCount = 0
 var originalString = String()

然后重写函数func textField(\utextfield:UITextField,shouldChangeCharactersIn-range,replacementString-string-string)->Bool如下:

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

    if string == "" {
        textCount = textCount - 1

        var truncated = textField.text?.substring(to: (textField.text?.index(before: (textField.text?.endIndex)!))!)
        textField.text = truncated
        if textCount == 5 || textCount == 3 {
            let truncated = textField.text?.substring(to: (textField.text?.index(before: (textField.text?.endIndex)!))!)
            textField.text = truncated
        }
        truncated = originalString.substring(to: originalString.index(before: originalString.endIndex))
        originalString = truncated!

    }
    else if textCount < 9 {
        if textCount == 3 || textCount == 5 {
            textField.text = textField.text! + "-"
        }

        if textCount <= 4 {
            textField.text = textField.text! + "*"
            originalString.append(string)
        }
        else {
            textField.text = textField.text! + string
            originalString.append(string)
        }

        textCount = textCount + 1
    }
    print(originalString)

    return false
}

记住将textfield的文本存储在委托本身中。否则它会给你错误的值。