* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.
* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.
AdCard 컴퍼넌트를 MainPage에 뿌리도록 소스 수정 후 앱 실행시 오류 발생 합니다.
전면광고를 넣도록 AdCard를 만들었고, MainPage에서 아래와 같이 수정 하였습니다.
> MainPage.js
<View style={styles.cardContainer}>
{/* 하나의 카드 영역을 나타내는 View */}
{
cateState.map((content,i)=>{
return (<AdCard content={content} key={i} navigation={navigation}/>)
})
}
</View>
이렇게 저장을 한 후 실행 시켰을 때, 아래와 같은 로그가 뜹니다.
( TypeError: Cannot read property 'eventsNotifyReady' of null )
TypeError: Cannot read property 'eventsNotifyReady' of null
This error is located at:
in AdCard (created by MainPage)
in RCTView (created by View)
in View (created by MainPage)
in RCTView (created by View)
in View (created by ScrollView)
in RCTScrollView (created by ScrollView)
in ScrollView (created by ScrollView)
in ScrollView (created by MainPage)
in RCTView (created by View)
in View (created by MainPage)
in MainPage (created by SceneView)
in StaticContainer
in EnsureSingleNavigator (created by SceneView)
in SceneView (created by CardContainer)
in RCTView (created by View)
in View (created by CardContainer)
in RCTView (created by View)
in View (created by CardContainer)
in RCTView (created by View)
in View
in CardSheet (created by Card)
in RCTView (created by View)
in View (created by AnimatedComponent)
in AnimatedComponent
in AnimatedComponentWrapper (created by PanGestureHandler)
in PanGestureHandler (created by PanGestureHandler)
in PanGestureHandler (created by Card)
in RCTView (created by View)
in View (created by AnimatedComponent)
in AnimatedComponent
in AnimatedComponentWrapper (created by Card)
in RCTView (created by View)
in View (created by Card)
in Card (created by CardContainer)
in CardContainer (created by CardStack)
in RNSScreen (created by AnimatedComponent)
in AnimatedComponent
in AnimatedComponentWrapper (created by InnerScreen)
in Suspender (created by Freeze)
in Suspense (created by Freeze)
in Freeze (created by DelayedFreeze)
in DelayedFreeze (created by InnerScreen)
in InnerScreen (created by Screen)
in Screen (created by MaybeScreen)
in MaybeScreen (created by CardStack)
in RNSScreenContainer (created by ScreenContainer)
in ScreenContainer (created by MaybeScreenContainer)
in MaybeScreenContainer (created by CardStack)
in RCTView (created by View)
in View (created by Background)
in Background (created by CardStack)
in CardStack (created by HeaderShownContext)
in RNCSafeAreaProvider (created by SafeAreaProvider)
in SafeAreaProvider (created by SafeAreaInsetsContext)
in SafeAreaProviderCompat (created by StackView)
in RNGestureHandlerRootView (created by GestureHandlerRootView)
in GestureHandlerRootView (created by StackView)
in StackView (created by StackNavigator)
in PreventRemoveProvider (created by NavigationContent)
in NavigationContent
in Unknown (created by StackNavigator)
in StackNavigator (created by StackNavigator)
in StackNavigator (created by App)
in EnsureSingleNavigator
in BaseNavigationContainer
in ThemeProvider
in NavigationContainerInner (created by App)
in App (created by withDevTools(App))
in withDevTools(App)
in RCTView (created by View)
in View (created by AppContainer)
in RCTView (created by View)
in View (created by AppContainer)
in AppContainer
in main(RootComponent), js engine: hermes
at node_modules\react-native\Libraries\Core\ExceptionsManager.js:null in reportException
at node_modules\react-native\Libraries\Core\ExceptionsManager.js:null in handleException
- ... 30 more stack frames from framework internals
참고 : expo 종료 후 expo start 를 통해 새로 받은 QR 코드를 가지고 expo 앱으로 재실행 하여도 오류가 발생 합니다.
증상은 로딩 화면까지는 뜬 후, MainPage로 넘어가자 마자 AdCard가 랜더링 되면서 오류가 발생하는 것 같습니다.
증상의 원인과 해결책 알려주시면 감사하겠습니다.
작성한 코드 및 에러 메세지
import React,{useEffect} from 'react';
import {View, Image, Text, StyleSheet,TouchableOpacity} from 'react-native'
import { useInterstitialAd, TestIds } from 'react-native-google-mobile-ads';
//MainPage로 부터 navigation 속성을 전달받아 Card 컴포넌트 안에서 사용
const adUnitId = __DEV__ ? TestIds.INTERSTITIAL : 'ca-app-pub-55708343368676/4903859898';
export default function AdCard({content,navigation}){
const { isLoaded, isClosed, load, show } = useInterstitialAd(TestIds.INTERSTITIAL, {
requestNonPersonalizedAdsOnly: true,
});
useEffect(() => {
// Start loading the interstitial straight away
load();
}, [load]);
useEffect(() => {
if (isClosed) {
// Action after the ad is closed
navigation.navigate('DetailPage',{idx:content.idx})
}
}, [isClosed, navigation]);
return(
//카드 자체가 버튼역할로써 누르게되면 상세페이지로 넘어가게끔 TouchableOpacity를 사용
<TouchableOpacity style={styles.card} onPress={() => {
if (isLoaded) {
show();
} else {
// No advert ready to show yet
navigation.navigate('DetailPage',{idx:content.idx})
}
}}>
<Image style={styles.cardImage} source={{uri:content.image}}/>
<View style={styles.cardText}>
<Text style={styles.cardTitle} numberOfLines={1}>{content.title}</Text>
<Text style={styles.cardDesc} numberOfLines={3}>{content.desc}</Text>
<Text style={styles.cardDate}>{content.date}</Text>
</View>
</TouchableOpacity>
)
}
const styles = StyleSheet.create({
card:{
flex:1,
flexDirection:"row",
margin:10,
borderBottomWidth:0.5,
borderBottomColor:"#eee",
paddingBottom:10
},
cardImage: {
flex:1,
width:100,
height:100,
borderRadius:10,
},
cardText: {
flex:2,
flexDirection:"column",
marginLeft:10,
},
cardTitle: {
fontSize:20,
fontWeight:"700"
},
cardDesc: {
fontSize:15
},
cardDate: {
fontSize:10,
color:"#A6A6A6",
}
});
import React,{useState,useEffect} from 'react';
import { StyleSheet, Text, View, Image, TouchableOpacity, ScrollView} from 'react-native';
const main = 'https://storage.googleapis.com/sparta-image.appspot.com/lecture/main.png'
import data from '../data.json';
import Card from '../components/Card';
import AdCard from '../components/AdCard';
import Loading from '../components/Loading';
import { StatusBar } from 'expo-status-bar';
import * as Location from "expo-location";
import axios from "axios"
import {firebase_db} from "../firebaseConfig"
import { BannerAd, BannerAdSize, TestIds } from 'react-native-google-mobile-ads';
const adUnitId = __DEV__ ? TestIds.BANNER : 'ca-app-pub-3304396512610524/1017015611';
export default function MainPage({navigation,route}) {
//useState 사용법
//[state,setState] 에서 state는 이 컴포넌트에서 관리될 상태 데이터를 담고 있는 변수
//setState는 state를 변경시킬때 사용해야하는 함수
//모두 다 useState가 선물해줌
//useState()안에 전달되는 값은 state 초기값
const [state,setState] = useState([])
const [cateState,setCateState] = useState([])
//날씨 데이터 상태관리 상태 생성!
const [weather, setWeather] = useState({
temp : 0,
condition : ''
})
//하단의 return 문이 실행되어 화면이 그려진다음 실행되는 useEffect 함수
//내부에서 data.json으로 부터 가져온 데이터를 state 상태에 담고 있음
const [ready,setReady] = useState(true)
useEffect(()=>{
navigation.setOptions({
title:'나만의 꿀팁'
})
//뒤의 1000 숫자는 1초를 뜻함
//1초 뒤에 실행되는 코드들이 담겨 있는 함수
setTimeout(()=>{
firebase_db.ref('/tip').once('value').then((snapshot) => {
console.log("파이어베이스에서 데이터 가져왔습니다!!")
let tip = snapshot.val();
setState(tip)
setCateState(tip)
getLocation()
setReady(false)
});
// getLocation()
// setState(data.tip)
// setCateState(data.tip)
// setReady(false)
},1000)
},[])
const getLocation = async () => {
//수많은 로직중에 에러가 발생하면
//해당 에러를 포착하여 로직을 멈추고,에러를 해결하기 위한 catch 영역 로직이 실행
try {
//자바스크립트 함수의 실행순서를 고정하기 위해 쓰는 async,await
await Location.requestForegroundPermissionsAsync();
const locationData= await Location.getCurrentPositionAsync();
// console.log(locationData)
// console.log(locationData['coords']['latitude'])
// console.log(locationData['coords']['longitude'])
const latitude = locationData['coords']['latitude']
const longitude = locationData['coords']['longitude']
const API_KEY = "cfc258c75e1da2149c33daffd07a911d";
const result = await axios.get(
`http://api.openweathermap.org/data/2.5/weather?lat=${latitude}&lon=${longitude}&appid=${API_KEY}&units=metric`
);
const temp = result.data.main.temp;
const condition = result.data.weather[0].main
//오랜만에 복습해보는 객체 리터럴 방식으로 딕셔너리 구성하기!!
//잘 기억이 안난다면 1주차 강의 6-5를 다시 복습해보세요!
setWeather({
temp,condition
})
} catch (error) {
//혹시나 위치를 못가져올 경우를 대비해서, 안내를 준비합니다
Alert.alert("위치를 찾을 수가 없습니다.", "앱을 껏다 켜볼까요?");
}
}
const category = (cate) => {
if(cate == "전체보기"){
//전체보기면 원래 꿀팁 데이터를 담고 있는 상태값으로 다시 초기화
setCateState(state)
}else{
setCateState(state.filter((d)=>{
return d.category == cate
}))
}
}
//data.json 데이터는 state에 담기므로 상태에서 꺼내옴
// let tip = state.tip;
let todayWeather = 10 + 17;
let todayCondition = "흐림"
//return 구문 밖에서는 슬래시 두개 방식으로 주석
return ready ? <Loading/> : (
/*
return 구문 안에서는 {슬래시 + * 방식으로 주석
*/
<View>
{__DEV__ ? null : (<BannerAd
unitId={adUnitId}
size={BannerAdSize.FULL_BANNER}
requestOptions={{
requestNonPersonalizedAdsOnly: true,
}}
/>)}
<ScrollView style={styles.container}>
<StatusBar style="light" />
{/* <Text style={styles.title}>나만의 꿀팁</Text> */}
<Text style={styles.weather}>오늘의 날씨: {weather.temp + '°C ' + weather.condition} </Text>
<TouchableOpacity style={styles.aboutButton} onPress={()=>{navigation.navigate('AboutPage')}}>
<Text style={styles.aboutButtonText}>소개 페이지</Text>https://spartacodingclub.kr/
</TouchableOpacity>
<Image style={styles.mainImage} source={{uri:main}}/>
<ScrollView style={styles.middleContainer} horizontal indicatorStyle={"white"}>
<TouchableOpacity style={styles.middleButtonAll} onPress={()=>{category('전체보기')}}><Text style={styles.middleButtonTextAll}>전체보기</Text></TouchableOpacity>
<TouchableOpacity style={styles.middleButton01} onPress={()=>{category('생활')}}><Text style={styles.middleButtonText}>생활</Text></TouchableOpacity>
<TouchableOpacity style={styles.middleButton02} onPress={()=>{category('재테크')}}><Text style={styles.middleButtonText}>재테크</Text></TouchableOpacity>
<TouchableOpacity style={styles.middleButton03} onPress={()=>{category('반려견')}}><Text style={styles.middleButtonText}>반려견</Text></TouchableOpacity>
<TouchableOpacity style={styles.middleButton04} onPress={()=>{navigation.navigate('LikePage')}}><Text style={styles.middleButtonText}>꿀팁 찜</Text></TouchableOpacity>
</ScrollView>
<View style={styles.cardContainer}>
{/* 하나의 카드 영역을 나타내는 View */}
{
cateState.map((content,i)=>{
return (<AdCard content={content} key={i} navigation={navigation}/>)
})
}
</View>
</ScrollView>
</View>
)
}
const styles = StyleSheet.create({
container: {
//앱의 배경 색
backgroundColor: '#fff',
},
title: {
//폰트 사이즈
fontSize: 20,
//폰트 두께
fontWeight: '700',
//위 공간으로 부터 이격
marginTop:50,
//왼쪽 공간으로 부터 이격
marginLeft:20
},
weather:{
alignSelf:"flex-end",
paddingRight:20
},
mainImage: {
//컨텐츠의 넓이 값
width:'90%',
//컨텐츠의 높이 값
height:200,
//컨텐츠의 모서리 구부리기
borderRadius:10,
marginTop:20,
//컨텐츠 자체가 앱에서 어떤 곳에 위치시킬지 결정(정렬기능)
//각 속성의 값들은 공식문서에 고대로~ 나와 있음
alignSelf:"center"
},
middleContainer:{
marginTop:20,
marginLeft:10,
height:60
},
middleButtonAll: {
width:100,
height:50,
padding:15,
backgroundColor:"#20b2aa",
borderColor:"deeppink",
borderRadius:15,
margin:7
},
middleButton01: {
width:100,
height:50,
padding:15,
backgroundColor:"#fdc453",
borderColor:"deeppink",
borderRadius:15,
margin:7
},
middleButton02: {
width:100,
height:50,
padding:15,
backgroundColor:"#fe8d6f",
borderRadius:15,
margin:7
},
middleButton03: {
width:100,
height:50,
padding:15,
backgroundColor:"#9adbc5",
borderRadius:15,
margin:7
},
middleButton04: {
width:100,
height:50,
padding:15,
backgroundColor:"#f886a8",
borderRadius:15,
margin:7
},
middleButtonText: {
color:"#fff",
fontWeight:"700",
//텍스트의 현재 위치에서의 정렬
textAlign:"center"
},
middleButtonTextAll: {
color:"#fff",
fontWeight:"700",
//텍스트의 현재 위치에서의 정렬
textAlign:"center"
},
cardContainer: {
marginTop:10,
marginLeft:10
},
aboutButton: {
backgroundColor:"pink",
width:100,
height:40,
borderRadius:10,
alignSelf:"flex-end",
marginRight:20,
marginTop:10
},
aboutButtonText: {
color:"#fff",
textAlign:"center",
marginTop:10
}
});
