将“逗号”添加到货币掩码时，我在做什么错

Question

我正在尝试在textField上添加一种包含十进制数字的格式。但是，我只得到了这种格式 R $ 150.500.300 ，而不是 R $ 150.500,300 。我在做什么错了？

我希望用户数字也能加上小数，例如R $ 1.500,50或，500

这是我的代码的某些部分：

fileprivate struct Constants {
    static let letterMaskCharacterUpper: Character = "A"
    static let letterMaskCharacterLower: Character = "a"
    static let numberMaskCharacter: Character = "0"
    static let wildMaskCharacter: Character = "#"
}

class FormNumericFieldDelegate: NSObject, UITextFieldDelegate {

    var controlVM: FormControlViewModel
    var maxValue: Double?
    var minValue: Double?
    var regexKeyPress: String?
    var regexLostFocus: String?
    var maskType: String?
    var maskValue: String?

    init(controlVM: FormControlViewModel, maxValue: Double? = nil, minValue: Double? = nil, regexKeyPress: String? = nil, regexLostFocus: String? = nil, maskType: String? = nil, maskValue: String? = nil) {
        self.controlVM = controlVM
        self.maxValue = maxValue
        self.minValue = minValue
        self.regexKeyPress = regexKeyPress
        self.regexLostFocus = regexLostFocus
        self.maskType = maskType
        self.maskValue = maskValue
        super.init()
    }

    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        let aSet = NSCharacterSet(charactersIn:"0123456789,.").inverted
        let compSepByCharInSet = string.components(separatedBy: aSet)
        let numberFiltered = compSepByCharInSet.joined(separator: "")
        if string != numberFiltered {
            showErrorMessage(textField: textField)
            return false
        }

        let currentText: NSString = textField.text as NSString? ?? ""

        var rangeNew = range
        rangeNew.location = range.location - 1

        var newText = ""

        if let mType = maskType, mType == "Percentage" {
            if rangeNew.location >= 0 {
                newText = (currentText.replacingOccurrences(of: "%", with: "") as NSString).replacingCharacters(in: rangeNew, with: string)
            } else {
                newText = currentText.replacingCharacters(in: range, with: string)
            }
        } else {
            newText = currentText.replacingCharacters(in: range, with: string)
        }


        //Regex validation
        if let regexKeyPress = self.regexKeyPress,
            let textbox = textField as? NumericTextField {
            if newText.range(of: regexKeyPress, options: .regularExpression) == nil {
                showErrorMessage(textField: textField)
                return false
            }else{
                textbox.errorMessage = ""
            }
        }
        //MaxValue validation
        if let maxValue =  self.maxValue, let newValue = Double(newText.replacingOccurrences(of: "%", with: "")) {
            if newValue > maxValue {
                showErrorMessage(textField: textField)
                return false
            }
        }
        //Mask transformation
        if let mType = maskType, var mValue = maskValue {
            if mType == "Decimal" || mType == "Currency" || mType == "Percentage" {
                if mValue.isEmpty {
                    mValue = "0"
                }
                do {
                    if let convertedValue = try Conversion.convertStringNumber(obj: newText.digits, tClass: NSNumber.self) {
                        let dividedValue = convertedValue.decimalValue / pow(10, 0)
                        controlVM.setValue(path: .value, value: "\(dividedValue)")
                        return false
                    }
                }
                catch {
                    print(error.localizedDescription)
                }
            }
        }

        controlVM.setValue(path: .value, value: newText)

        if let textBox = textField as? FormNumericTextField {
            if textBox.controlViewModel != nil {
                do {
                    try textBox.controlViewModel?.setValueFromView(value: newText)
                } catch {
                    print(error.localizedDescription)
                }
            }
        }

        return false
    }

    func textFieldDidBeginEditing(_ textField: UITextField) {
        if let textbox = textField as? NumericTextField {
            textbox.errorMessage = ""
        }
    }

    func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
        //Regex validation
        if let regexLostFocus = self.regexLostFocus,
            let text = textField.text,
            let textbox = textField as? NumericTextField {
            if text.range(of: regexLostFocus, options: .regularExpression) == nil, let placeholder = textbox.placeholder {
                NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(resetErrorMessage(textbox:)), object: textbox)
                textbox.errorMessage = "\(placeholder) - \(NSLocalizedString("regex_error_pattern_dont_match", comment: ""))"
            }else{
                textbox.errorMessage = ""
            }
        }
        //MinValue validation
        if let minValue =  self.minValue, let newText = textField.text, let newValue = Double(newText.replacingOccurrences(of: "%", with: "").replacingOccurrences(of: ",", with: "")) {
            if newValue < minValue {
                showErrorMessage(textField: textField)
            }
        }
        return true
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        let nextTag = textField.tag + 1

        if let nextResponder = textField.superview?.viewWithTag(nextTag) {
            nextResponder.becomeFirstResponder()
        } else {
            textField.resignFirstResponder()
        }

        return true
    }

    private func showErrorMessage(textField: UITextField) {
        if let textbox = textField as? NumericTextField {
            if let placeholder = textbox.placeholder {
                textbox.errorMessage = "\(placeholder) - \(NSLocalizedString("regex_error_pattern_dont_match", comment: ""))"
            }else{
                textbox.errorMessage = NSLocalizedString("regex_error_pattern_dont_match", comment: "")
            }
        }
    }

    @objc private func resetErrorMessage(textbox: NumericTextField) {
        textbox.errorMessage = ""
    }

我确实有向我返回货币格式的功能：

 private class func getCurrencyFormat(format: String) throws -> NumberFormatter {
        if let formatter = dateFormatterCache.object(forKey: "c" + format as NSString) as? NumberFormatter {
            return formatter
        } else {
            let newFormatter = NumberFormatter()
            newFormatter.usesGroupingSeparator = true
            newFormatter.numberStyle = .currency
            newFormatter.locale = Locale.current
            newFormatter.minimumFractionDigits = Int(format) ?? 0
            newFormatter.maximumFractionDigits = Int(format) ?? 0
            dateFormatterCache.setObject(newFormatter, forKey: "c" + format as NSString)
            return newFormatter
        }
    }

问题图片：