Question 400660 in IOS Swift Question posted in
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Ios swift – iOS TextField check text via AutoFill

I have textfield. It should allow just number but when I try to with autofill, I can choose contact name in contacts. How can I check is it numeric or not?

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Then I can choose AutoFill and contacts. And I can choose contact name that textfield. I just want to check if is it number or not.

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2

Answers


  1. 0

    You can use TextField’s shouldChangeCharactersIn function. Here is the code example:

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

    let numericSet = CharacterSet.decimalDigits
    if let _ = string.rangeOfCharacter(from: numericSet.inverted) {
        // If the condition true that means string includes non-numeric character(s). So need to return false
        return false
    }
    
    return true
}

    This function prevents non-numeric characters from being entered into the text field.

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  2. 0

    I’m using it in my solution

    public func textFieldDidChangeSelection(_ textField: UITextField) {
     if let textEdit = textField.text {
         if Int(textEdit) == nil {
             textField.text = oldValue
             return
         }
      }
 }

    If it helps, adapt it to your case

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