Question

如何在swift中为文本字段设置掩码？例如，当用户键入其显示时的电话文本字段，如目标-C中的此代码的电话格式：

self.textField.mask = @"(##)####-####";

Answer 1

Swift 4非常简单并且具有Masking Max文本字段长度和Handle Back Space

 //MARK: - text field masking
internal func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

    //MARK:- If Delete button click
    let  char = string.cString(using: String.Encoding.utf8)!
    let isBackSpace = strcmp(char, "\\b")

    if (isBackSpace == -92) {
        print("Backspace was pressed")
        textField.text!.removeLast()
        return false
    }

    if textField == txtworkphone
    {
        if (textField.text?.count)! == 3
        {
            textField.text = "(\(textField.text!)) "  //There we are ading () and space two things
        }
        else if (textField.text?.count)! == 9
        {
            textField.text = "\(textField.text!)-" //there we are ading - in textfield
        }
        else if (textField.text?.count)! > 13
        {
            return false
        }
    }
}

Answer 2

快速4 && 5简易电话号码掩码

func formattedNumber(number: String) -> String {
        let cleanPhoneNumber = number.components(separatedBy: CharacterSet.decimalDigits.inverted).joined()
        let mask = "## ### ###"
        var result = ""
        var index = cleanPhoneNumber.startIndex
        for ch in mask! where index < cleanPhoneNumber.endIndex {
            if ch == "#" {
                result.append(cleanPhoneNumber[index])
                index = cleanPhoneNumber.index(after: index)
            } else {
                result.append(ch)
            }
        }
        return result
    }
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        guard let text = textField.text else { return false }
        let newString = (text as NSString).replacingCharacters(in: range, with: string)
        textField.text = formattedNumber(number: newString)
return false
    }

在swift中掩盖textField

2 个答案: