You can pass a callback function as parameter when you call navigate like this: const DEMO_TOKEN = await AsyncStorage.getItem(‘id_token’); if (DEMO_TOKEN === null) { this.props.navigation.navigate(‘Login’, { onGoBack: () => this.refresh(), }); return -3; } else { this.doSomething(); } And define your callback function: refresh() { this.doSomething(); } Then in the login/registration view, before goBack, you … Read more
Just kill all node process and start npm server and run application: Step1: run command killall -9 node For windows users, run: taskkill /im node.exe Run taskkill /f /im node.exe if the process still persists. Step2: run command npm start –reset-cache Step3: run command react-native run-ios OR react-native run-android
This is what I’ve done with it: Close all terminals and run build again. You may forget to close nodejs terminal from another project, and they happen to have installed different react version. So the code fetches from nodejs server conflicts with the native one.
Instead of hard-coding your app constants and doing a switch on the environment (I’ll explain how to do that in a moment), I suggest using the twelve factor suggestion of having your build process define your BASE_URL and your API_KEY. To answer how to expose your environment to react-native, I suggest using Babel’s babel-plugin-transform-inline-environment-variables. To … Read more
When you write code in Expo you are writing React Native code. Expo has two main pieces: Expo CLI (expo-cli): a developer tool for creating projects, viewing logs, opening on your device, publishing, etc. Expo client: an app on your phone that lets you open your projects while you’re working on them, without needing to … Read more
your render method should looks like this: render () { let s=”kaveh”; return ( <Text> {s === ‘kaveh’ ? ‘Hello kaveh’ : ‘Hello world’} </Text> ); } this is based on your code.