Question

@IBOutlet weak var labelLabel: UILabel
@IBOutlet weak var textFieldField: UITextField
@IBAction func buttonButton(sender: AnyObject) {

   var conversionRate = 7

        self.labelLabel.text = self.textFieldField.text // Here I'm trying to multiply textFieldField by 7 (conversionRate)

        textFieldField.resignFirstResponder()
    }

您好，我想将UITextField中的值乘以7.有人可以帮我吗？我尝试了一切。 .toInt（），intValue（），没什么

Answer 1

它应该与.toInt()：

一起使用

if let number = self.textFieldField.text?.toInt() {
  self.labelLabel.text = "\(number * conversionRate)"
}

Answer 2

你可以试试这个

    var conversionRate = 7;
    var value = self.nameLbl.text.toInt();
    value = value!*conversionRate;
    self.nameLbl.text = NSString(format:"%d",value!)as String;

或

    var conversionRate = 7;
    var value : Int = self.nameLbl.text.toInt()!;
    value = value*conversionRate;
    self.nameLbl.text = String(value);

OR

    var conversionRate = 7;
    if let number = nameLbl.text?.toInt() {
        self.nameLbl.text = "\(number * conversionRate)"
    }

Answer 3

    let a = textFieldField.text
    let conversionRate = 7
    let b = Int(a!)! * conversionRate //use Double(a!)! instead of Int(a!)! if your are using a floating point value for "conversionRate" variable.
    labelLabel.text = ("\(b)")

快乐的编码！

Swift - 如何从UITextField中乘以值

3 个答案: