如何将2个textfields togethers添加为int（swift3） [英] how to add 2 textfields togethers as int (swift3)

问题描述

我正在尝试将2个文本字段转换为整数，然后将它们一起添加。我还想在日志中打印总和。

I am trying to convert 2 textfields to ints and then add them together. I would also like to print the sum in the log.

let jake = t3.text! + t4.text!

推荐答案

在 Swift中将文本转换为Int 以及我们可以做的补充......

Convert text into Int in Swift and an addition like we can do...

   //set before this condition Validation for Text field
    let sum = (Int(textFirst.text ?? "0")! + Int(textSecond.text ?? "0"))!
    print(sum) //Output here  

---

---

  //MARK: - Text Field Delegate Method for Input validation
  func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool
  {
    let allowedCharacters = CharacterSet.decimalDigits
    let characterSet = CharacterSet(charactersIn: string)
    return allowedCharacters.isSuperset(of: characterSet)
  }

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