update

src/Admin.js

@@ -11,7 +11,6 @@ function Admin() {
     const indexRef = useRef(0)
     const dbRef = useRef([])
 
-
     useEffect(() => {
         if (JSON.parse(localStorage.getItem('QnA'))) {
             dbRef.current=JSON.parse(localStorage.getItem('QnA'))
@@ -24,9 +23,15 @@ function Admin() {
 
     function handleClickQuiz(e) {
         indexRef.current = Number(e.target.id) - 1
-        console.log(dbRef.current, indexRef.current)
-        setresult(<AdminQuiz quizNum={e.target.id} fn={handleClickSave} data={dbRef.current[e.target.id]} />)
+        // console.log(dbRef.current, indexRef.current)
 
+        if(dbRef.current[e.target.id-1]){
+            setresult(<AdminQuiz quizNum={e.target.id} fn={handleClickSave} data={dbRef.current[e.target.id-1]} />)
+        }
+        else{
+            dbRef.current[e.target.id-1] = {'Q':'x', 'Choose':[0,0,0,0], 'A':'x'}
+            setresult(<AdminQuiz quizNum={e.target.id} fn={handleClickSave} data={dbRef.current[e.target.id-1]} />)
+        }
     }
 
     function handleClickAddQuiz() {

src/AdminQuiz.js

-import React, { useState} from 'react';
+import React, { useState, useEffect } from 'react';
 
 let list = []
 let QnAadmin = {}
@@ -7,16 +7,17 @@ let savechoose = {}
 function AdminQuiz(props) {
 
     const [question, setQuestion] = useState(props.data.Q)
-    // setQuestion(props.data.Q)
-    // question = props.data.Q
     const [choose, setChoose] = useState(props.data.Choose)
-    // setChoose(props.data.Choose)
-    // choose = props.data.Choose
     const [answer, setAnswer] = useState(props.data.A)
-    // setAnswer(props.data.A)
-    // answer = props.data.A
     const [selectOption, setselectOption] = useState(1)
 
+    // props.quizNum가 바뀔때마다 즉, Admin.js에서 퀴즈버튼을 바꿔누를때마다 useEffect가 발생하여 값을 업데이트 시켜줍니다.
+    useEffect(() => {
+        setQuestion(props.data.Q)
+        setChoose(props.data.Choose)
+        setAnswer(props.data.A)
+    },[props.quizNum])
+
 
     const handleChangeQuestion = (event) => {
         QnAadmin['Q'] = event.target.value