This example will show you back navigation which is expected generally in most of the flows. You will have to add following code to every screen depending on expected behavior. There are 2 cases: 1. If there are more than 1 screen on stack, device back button will show previous screen. 2. If there is … Read more
export {default as Module} from ‘./Module/Module’; is the standard ES6 way, as long as you don’t need Module to also be available inside the module doing the exporting. export Module from ‘./Module/Module’; is a proposed ESnext way to do it, but that only works if you’ve enabled it in Babel for now.
Using a RegExp to replace any non digit is faster than using a for loop with a whitelist, like other answers do. Use this for your onTextChange handler: onChanged (text) { this.setState({ mobile: text.replace(/[^0-9]/g, ”), }); } Performance test here: https://jsperf.com/removing-non-digit-characters-from-a-string
Linux uses the inotify package to observe filesystem events, individual files or directories. Since React / Angular hot-reloads and recompiles files on save it needs to keep track of all project’s files. Increasing the inotify watch limit should hide the warning messages. You could try editing # insert the new value into the system config … Read more
You should move all the code from the componentWillMount to the constructor or componentDidMount. componentWillMount() is invoked just before mounting occurs. It is called before render(), therefore calling setState() synchronously in this method will not trigger an extra rendering. Generally, we recommend using the constructor() instead. Avoid introducing any side-effects or subscriptions in this method. … Read more
For android APK bundle using expo, you can use the following command: expo build:android -t app-bundle The size will be much smaller once you upload it to the play store. This is relevant for React Native SDK 32 and earlier.
We can use the built-in nestedscrollenabled prop for the children FlatList/ScrollView components. <FlatList nestedScrollEnabled /> This is only required for Android (Nested scrolling is supported by default on iOS).
The global scope in React Native is variable global. Such as global.foo = foo, then you can use global.foo anywhere. But do not abuse it! In my opinion, global scope may used to store the global config or something like that. Share variables between different views, as your description, you can choose many other solutions(use … Read more
I’ve created working example to share multiple or single images using react-native-share CheckOut ExpoSnack Here added comments before every method what it’ll do and what needs to be replaced. // multiple images share example const shareMultipleImages = async () => { const shareOptions = { title: ‘Share multiple files example’, // here replace base64 data … Read more
Try to implement onMomentumScrollBegin on FlatList : constructor(props) { super(props); this.onEndReachedCalledDuringMomentum = true; } … <FlatList … onEndReached={this.onEndReached.bind(this)} onEndReachedThreshold={0.5} onMomentumScrollBegin={() => { this.onEndReachedCalledDuringMomentum = false; }} /> and modify your onEndReached onEndReached = ({ distanceFromEnd }) => { if(!this.onEndReachedCalledDuringMomentum){ this.fetchData(); this.onEndReachedCalledDuringMomentum = true; } }