textfield number only code example

Example 1: flutter textfield number only

import 'package:flutter/services.dart';

keyboardType: TextInputType.number,
inputFormatters: [FilteringTextInputFormatter.digitsOnly],

Example 2: uitextfield numbers only

//class ViewController: UIViewController, UITextInputTraits {

@IBOutlet weak var textFieldKeyboardType: UITextField!{
    didSet{
        textFieldKeyboardType.keyboardType = UIKeyboardType.NumberPad
    }
}
var keyboardType: UIKeyboardType { 
    get{ 
        return textFieldKeyboardType.keyboardType
    } 
    set{ 
        if newValue != UIKeyboardType.NumberPad{
            self.keyboardType = UIKeyboardType.NumberPad
        }
    } 
}