From 07a3173532ca266237dff87f68df6184d17d7106 Mon Sep 17 00:00:00 2001
From: dayo2n <0217dayun@naver.com>
Date: Thu, 2 Feb 2023 18:46:51 +0900
Subject: [PATCH] =?UTF-8?q?[FEAT][#2]=20=EB=B3=B4=EC=95=88=EC=BD=94?=
 =?UTF-8?q?=EB=93=9C=20=EC=B5=9C=EB=8C=80=20=EC=9E=85=EB=A0=A5=20=EA=B0=80?=
 =?UTF-8?q?=EB=8A=A5=20=EA=B8=80=EC=9E=90=EB=A5=BC=2012=EC=9E=90=EB=A1=9C?=
 =?UTF-8?q?=20=EC=A0=9C=ED=95=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../Controller/CheckSecurityCodeController.swift | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/momoIOS/Authentication/Controller/CheckSecurityCodeController.swift b/momoIOS/Authentication/Controller/CheckSecurityCodeController.swift
index 8e50a2a..315236c 100644
--- a/momoIOS/Authentication/Controller/CheckSecurityCodeController.swift
+++ b/momoIOS/Authentication/Controller/CheckSecurityCodeController.swift
@@ -37,6 +37,9 @@ class CheckSecurityCodeController: UIViewController {
     // MARK: - Lifecyle
     override func viewDidLoad() {
         super.viewDidLoad()
+        
+        codeField.delegate = self
+        
         view.backgroundColor = .white
         configureUI()
         codeField.becomeFirstResponder()
@@ -80,3 +83,16 @@ class CheckSecurityCodeController: UIViewController {
         completeButton.addTarget(self, action: #selector(handleCompleteRegistration), for: .touchUpInside)
     }
 }
+
+extension CheckSecurityCodeController: UITextFieldDelegate {
+    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
+        guard let text = textField.text else { return false }
+        let maxLength: Int = 12
+            
+        // 최대 글자수 이상을 입력한 이후에는 중간에 다른 글자를 추가할 수 없게끔 작동
+        if text.count >= maxLength && range.length == 0 && range.location <= maxLength {
+            return false
+        }
+        return true
+    }
+}