From 498cb26ebe63d9882bf113835a9d843992fa5ba6 Mon Sep 17 00:00:00 2001
From: Ahmed Fitoh <ahmed.fitoh.zakrya@protonmail.com>
Date: Mon, 26 Oct 2020 14:43:12 +0200
Subject: [PATCH] -  Check for custom keyboards in case of numeric otp input.

---
 OTPFieldView/OTPFieldView.swift | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/OTPFieldView/OTPFieldView.swift b/OTPFieldView/OTPFieldView.swift
index bcee25d..233dc02 100644
--- a/OTPFieldView/OTPFieldView.swift
+++ b/OTPFieldView/OTPFieldView.swift
@@ -259,6 +259,11 @@ extension OTPFieldView: UITextFieldDelegate {
     public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
         let replacedText = (textField.text as NSString?)?.replacingCharacters(in: range, with: string) ?? ""
         
+        // Check for custom keyboards in case of numeric otp input.
+        if otpInputType == .numeric && replacedText.rangeOfCharacter(from: CharacterSet.decimalDigits.inverted) != nil {
+            return false
+        }
+        
         // Check since only alphabet keyboard is not available in iOS
         if !replacedText.isEmpty && otpInputType == .alphabet && replacedText.rangeOfCharacter(from: .letters) == nil {
             return false