a

src/AdminQuiz.js

-import React, { useState } from 'react';
+import React, { useState, useEffect } from 'react';
 // import Admin from './Admin'
 
 let list = []
@@ -11,30 +11,40 @@ let savechoose = {}
 
 function AdminQuiz(props) {
 
-
     const [question, setQuestion] = useState('')
     const [choose, setChoose] = useState('')
     const [answer, setAnswer] = useState('')
     const [selectOption, setselectOption] = useState(1)
-    const [v, setv] = useState('')
+    const [q, setq] = useState('')
+    const [c, setc] = useState([])
+    const [a, seta] = useState('')
+
+    useEffect(()=>{
+        setQuestion('')
+        if(props.data[props.QuizNum-1]){
+            setq(props.data[props.QuizNum-1].Q)
+            setc(props.data[props.QuizNum-1].Choose)
+            seta(props.data[props.QuizNum-1].A)
+        }
+        else {
+            setq('보기를 입력하세요')
+            setc(['보기를 입력하세요','보기를 입력하세요','보기를 입력하세요','보기를 입력하세요'])
+            seta('보기를 입력하세요')
+        }
+    },[props.QuizNum])
 
     const handleChangeQuestion = (event) => {
         QnAadmin['Q'] = event.target.value
-        setv(event.target.value)
         setQuestion(event.target.value)
     }
 
     const handleChangeChoose = (event) => {
         savechoose[event.target.id] = event.target.value
-
-        // QnAadmin['Choose'] = event.target.value
-
         setChoose(event.target.value)
     }
-    const handleChangeanswer = (event) => {
 
+    const handleChangeanswer = (event) => {
         QnAadmin['A'] = event.target.value
-
         setAnswer(event.target.value)
     }
 
@@ -46,7 +56,7 @@ function AdminQuiz(props) {
                         <input type="radio" checked={false} name="answer" />
                     </div>
                 </div>
-                <input type="text" class="form-control" id={String(selectOption + 1)} placeholder="보기를 입력하세요" onChange={handleChangeChoose} />
+                <input type="text" class="form-control" id={String(selectOption + 1)} placeholder={c[1]} onChange={handleChangeChoose} />
             </div>
         )
         setselectOption(selectOption + 1)
@@ -71,15 +81,11 @@ function AdminQuiz(props) {
             QnAadmin = {}
             localStorage.setItem('QnA', JSON.stringify(QnAadmins))
             console.log(QnAadmins)
+            // setselectOption(1)
             alert('입력이 완료되었습니다.')
         }
 
     }
-    function onFocusHandler(){
-        document.getElementById("inputQuiz").value=""
-        setv("")
-    }
-
 
     return (
         <div className="" id="Quiz1">
@@ -87,7 +93,7 @@ function AdminQuiz(props) {
             <div className="p-3 borber">
                 <div className="p-3 ">
                     <span className="font-weight-bold mr-2 h3">1. 문제 입력하기</span>
-                    <input type="text" id="inputQuiz" className="form-control" onFocus={onFocusHandler} value={props.QuizNum<4?props.data[props.QuizNum-1].Q:v} onChange={handleChangeQuestion} placeholder="문제를 입력하세요" />
+                    <input type="text" id="inputQuiz" className="form-control" value={question} onChange={handleChangeQuestion} placeholder={q} />
                 </div>
                 <div className="p-3 ">
                     <span className="font-weight-bold mr-2 h3">2. 보기 입력하기</span>
@@ -98,7 +104,7 @@ function AdminQuiz(props) {
                                     <input type="radio" checked={false} name="answer" />
                                 </div>
                             </div>
-                            <input type="text" className="form-control" id='1' placeholder="보기를 입력하세요" onChange={handleChangeChoose} />
+                            <input type="text" className="form-control" id='1' value={choose} placeholder={c[0]} onChange={handleChangeChoose} />
                         </div>
                         {list.map((element) => element)}
                         <button className="btn btn-outline-secondary btn-sm" onClick={addSelectOption}>+</button>
@@ -108,7 +114,7 @@ function AdminQuiz(props) {
 
                 <div className="p-3 ">
                     <span className="font-weight-bold mr-2 h3">정답:</span>
-                    <input type="text" onChange={handleChangeanswer} placeholder="정답을 입력하세요" />
+                    <input type="text" value={answer} onChange={handleChangeanswer} placeholder={a} />
                 </div>
 
                 <label for="inputLogin" className="d-flex justify-content-center">