用于textfield的Swift两个代表函数

Question

我在viewController中有两个文本区域。一个是“金额”，一个是“利率”。对于“金额”，我使用委托功能来控制他们输入的时间，它会自动添加逗号和$。这里是代码：

func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool { 
    let oldText = textField.text! as NSString 
    var newText = oldText.stringByReplacingCharactersInRange(range, withString: string) as NSString! 
    var newTextString = String(newText) 

    let digits = NSCharacterSet.decimalDigitCharacterSet() 
    var digitText = "" 
    for c in newTextString.unicodeScalars { 
     if digits.longCharacterIsMember(c.value) { 
      digitText.append(c) 
     } 
    } 

    let formatter = NSNumberFormatter() 
    //  formatter.usesSignificantDigits = false 
    formatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle 
    formatter.locale = NSLocale(localeIdentifier: "en_US") 
    let numberFromField = (NSString(string: digitText).doubleValue)/100 

    newText = formatter.stringFromNumber(numberFromField) 
    if newText.isEqualToString("$0.00") { 
     newText = "" 
    } 

    //  let attributedString = NSMutableAttributedString(string: newText as String) 
    //  attributedString.addAttribute(NSKernAttributeName, value: CGFloat(0.05), range: NSRange(location: 0, length: newText.length)) 
    // 
    //  textField.attributedText = attributedString 

    textField.text = String(newText) 

    return false 

} 

对于“利率”，我想使输入自动添加％和限制只有一个小数点。我如何才能实现它我已经有一个委托功能。

Answer 1

var amountTextField: UITextField? 
var interestRateTextField: UITextField? 

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

    if textField == amountTextField { 
     // Do you stuff with amountTextField 
    } else if textField == interestRateTextField { 
     // Do you stuff with interestRateTextField 
    } 

    return false 

}