expo

问题 Screen1.js import React,{useEffect} from 'react' import {View,Text} from 'react-native' import * as firebase from 'firebase/app'; import '@firebase/firestore'; const Screen1 = props =>{ useEffect(() => { var dbh = firebase.firestore().collection("Jots").doc("note"); dbh.set({name:"pradeep"}) //The yellow warning is popped up in this line. }); return( <View> <Text>Title</Text> </View> ) } console [Unhandled promise rejection: ReferenceError: Can't find variable: atob] Stack trace: node_modules

问题 I have a file content.js that includes some JavaScript code that I want to inject inside a WebView using injectedJavaScript . I tried: fetch('./content.js').then((result) => { result = result.text(); this.setState(previousState => ( {contentScript: result} )); }); But it doesn't get the right file. const contentScript = require('./content.js'); This works, but it evals the JavaScript straight away and I can't seem to find a way to convert it to string before it gets executed. A solution is to

问题 I am using expo-cli@3.0.10 This app works fine in client expo which installed in device 回答1: Ok I believe I found the core problem - DNS issue . Your Android simulator cannot properly resolve the hostname using your current DNS for whichever OS you are on be it Mac OS, Windows or Linux. Follow this link to set your DNS address to 8.8.8.8 or some other applicable DNS. Once you set your DNS properly it should work. Make sure that 8.8.8.8 is the first DNS address in the list(?) of DNS addresses

问题 I am using expo-cli@3.0.10 This app works fine in client expo which installed in device 回答1: Ok I believe I found the core problem - DNS issue . Your Android simulator cannot properly resolve the hostname using your current DNS for whichever OS you are on be it Mac OS, Windows or Linux. Follow this link to set your DNS address to 8.8.8.8 or some other applicable DNS. Once you set your DNS properly it should work. Make sure that 8.8.8.8 is the first DNS address in the list(?) of DNS addresses

问题 I installed the expo cli with npm i -g exp then I run exp and I get -bash: exp: command not found I'm guessing I didn't add exp to path. So how do I do this properly? Nothing I've tried so far works. 回答1: This suggested 3 steps solution worked for me: First check if ~/.npm-global/bin is in your path: echo $PATH . If it isn’t there, you will need to add it to the path. Open up ~/.bash_profile then add the following line to the bottom: export PATH=$PATH:~/.npm-global/bin Finally, back in the

问题 I created my project in react native by CLI: _npm install -g create-react-native-app _create-react-native-app AwesomeProject _cd AwesomeProject _npm start Then I installed expo in my Android phone, and scanned a QR code on my computer screen. However, my phone can't connect to project, and I don't know why. It just loads and fails. This is error message: Could not load exp:// 192.168.56.1:19000. Network response timed out. This is view error: "Uncaught Error: java,not.SocketTimeoutException:

问题 I`m working on mobile app with React Native and Expo, providing security solutions. Project owner want to store in app sensitive authorization keys, used to contact with REST server and access to secured data. He demand to have this keys at least encrypted, and hard to read from outside as much as possible. I know about topis: Save sensitive data in React Native Is React Native's Async Storage secure? and about KeyChain , but they dont cover encyption and expo issues. So with is the best and

问题 I'm using react-navigation ("^3.0.9") with expo. This is my logic flow: TabView(BottomTabNavigator) with StackNavigatior: HomeStack --HomeScreen ... LinksStack --LinkScreen ... SettingsStack -- Aboutscreen ... Everything works ok, but now I would like to add a drawer navigation (hamburger menu) as follows: DrawerNavigation View --HomeScreen(which will show HomeScreen with 3 tabs) --Screen2 (no tabs) --Screen3 (no tabs) Which I tried to do the following: export const Tab =

问题 All was working fine and I was running Expo version 3.11.5, but the log said to update it to 3.11.7. I ran that command and it ruined my project. Please find the error logs below. PS C:\Users\MY PC\My_React_Native\fruits-vegetables> npm install --global expo-cli npm WARN deprecated joi@14.0.4: This version has been deprecated in accordance with the hapi support policy (hapi.im/support). Please upgrade to the latest version to get the best features, bug fixes, and security patches. If you are

问题 I am running the react-native-paper example app on the web. For this, I have replaced in the render: <PaperProvider theme={theme}> <SafeAreaProvider> <PreferencesContext.Provider value={preferences}> <React.Fragment> <NavigationNativeContainer initialState={initialState} onStateChange={state => AsyncStorage.setItem(PERSISTENCE_KEY, JSON.stringify(state)) } > - {Platform.OS === 'web' ? ( - <App /> - ) : ( <Drawer.Navigator drawerContent={() => <DrawerContent />}> <Drawer.Screen name="Home"