How do I implement SignalR in react native for implementing push notifications?
I have seen implementing SiganlR in react js by using packages like https://github.com/aspnet/SignalR.
I didn't find any solution for implementing signalR in React Native
You can use this package. I am using it right now, it works fine but i have a problem with reconnect hub.start().
You can install with this :
npm install #aspnet/signalr
Example:
let connection = new signalR.HubConnectionBuilder()
.withUrl("/chat")
.build();
connection.on("send", data => {
console.log(data);
});
connection.start()
.then(() => connection.invoke("send", "Hello"));
Related
I use 99% on my screens fetch. So if the connection is lost and data are not fetched my screen is empty. So when the internet is again online nothing happens.
So then I downloaded netInfo but if I disable my internet connection then my isOffline state is always false. Nothing happens, how can I detect on real time when internet is off/on?
const [isOffline, setIsOffline] = useState(false);
useEffect(() => {
const removeNetInfoSubscription = NetInfo.addEventListener((state: NetInfoState) => {
const offline = !(state.isConnected && state.isInternetReachable)
console.log(offline)
setIsOffline(offline)
})
return () => removeNetInfoSubscription()
}, [])
console.log(isOffline);
If you are using an old version of React Native, you might face this issue with netinfo. Downgrading the version of netinfo to v6 (or updating the React Native to version>=0.65) might make it work.
See this GitHub issue
I'm having a hard time getting WalletConnect 1.7.7 to work on React Native. I want to integrate in a crypto Wallet to handle dapps requests. Their documentation is...lacking. I'm following the "quickstart" in their docs, but listeners never gets fired.
import WalletConnect from "#walletconnect/client";
// Create connector
const connector = new WalletConnect(
{
// Required
uri: "wc:8a5e5bdc-a0e4-47...TJRNmhWJmoxdFo6UDk2WlhaOyQ5N0U=",
// Required
clientMeta: {
description: "WalletConnect Developer App",
url: "https://walletconnect.org",
icons: ["https://walletconnect.org/walletconnect-logo.png"],
name: "WalletConnect",
},
});
connector.on("session_request", (error, payload) => {
if (error) {
throw error;
}
// Handle Session Request
});
But session_request or any other event never get's fired. As per their documents that's all I need. Is there anything else I'm missing or perhaps it's not documented?
The documentation for Wallet Connect is very incomplete and there is very little information on the web. Are you using React Native with Expo? Because there the implementation changes. I don't see any flaws in your code. Test your integration from this website https://example.walletconnect.org/.
Using connect event instead of session_request on walllet connect works for me in react native.
connector.on('connect',(error,payload)=>{
console.log('eventtt',payload)
// Alert.alert('Connected')
})
React Native wont send multiple messages on state change throught websocket. Server recives 1st string normally and client gets console logs on every state change. Any idea why I get an error about state?
useEffect(() => {
socket.onopen = function (e) {
socket.send(String(state?.x));
};
socket.send("test") <-- this one does not work
console.log("send")
socket.onmessage = function () {
console.log("message")
}
socket.close();
}, [state])
Returns error INVALID_STATE_ERR
So basically when using react native with EXPO you will get those errors. After the application is build and installed (on the same phone) the application works.
I would like to reload the entire expo application when I click on the logout function and I want to do it without ejecting the application, is there a workaround for this? Any help would be appreciated. I have researched on the react-native-restart library but it requires me to eject my application.
These are my current codes
logOut() {
Auth.currentAuthenticatedUser({
bypassCache: false
}).
then(
user => user.signOut()
)
.catch(err => console.log(err))
}
You can use
import { Updates } from 'expo';
Updates.reload()
It's generally used to reload apps when new update is available, but should also work in your case
After expo remove
Updates.reload()
then you can use
await Updates.reloadAsync()
to reload application instead.
I have updated my app on app and play store and I want to force my app users to update the new version of app in App store and playstore.
You can check for the App Store / Play Store version of your app by using this library
react-native-appstore-version-checker.
In expo app you can get the current bundle version using Constants.nativeAppVersion. docs.
Now in your root react native component, you can add an event listener to detect app state change. Every time the app transitions from background to foreground, you can run your logic to determine the current version and the latest version and prompt the user to update the app.
import { AppState } from 'react-native';
class Root extends Component {
componentDidMount() {
AppState.addEventListener('change', this._handleAppStateChange);
}
_handleAppStateChange = (nextState) => {
if (nextState === 'active') {
/**
Add code to check for the remote app version.
Compare it with the local version. If they differ, i.e.,
(remote version) !== (local version), then you can show a screen,
with some UI asking for the user to update. (You can probably show
a button, which on press takes the user directly to the store)
*/
}
}
componentWillUnmount() {
AppState.removeEventListener('change', this._handleAppStateChange);
}
}
import VersionCheck from 'react-native-version-check';
i have used version check lib for this purpose and approach i used is below. if version is lower i'm opening a modal on which an update button appears, and that button redirects to app store/google play
componentDidMount() {
this.checkAppUpdate();
}
checkAppUpdate() {
VersionCheck.needUpdate().then(res => {
if (res.isNeeded) {
setTimeout(() => {
this.setState({openModal: true});
});
}
});
}
updateApp = () => {
VersionCheck.getStoreUrl({
appID: 'com.showassist.showassist',
appName,
})
.then(url => {
Linking.canOpenURL(url)
.then(supported => {
if (!supported) {
} else {
return Linking.openURL(url);
}
})
.catch(err => console.error('An error occurred', err));
})
.catch(err => {
console.log(`error is: ${err}`);
});
};
For future readers.
If you are using Expo managed workflow, install this package react-native-version-check-expo using yarn add react-native-version-check-expo or npm install react-native-version-check-expo.
Consult the package documentation on Github for usage guidelines.
I'm using react-native-version-check-expo library to achieve this. Working fine for me.
if you are looking for an easy to integrate built in solution. You can use App Upgrade https://appupgrade.dev/ service to force update your mobile apps.
Create new version entry for your app version that you want to update in the app upgrade service and select whether you want to force it or just want to let users know that new version is available.
Integrate your app with App Upgrade using available SDK. Official SDK are available for React Native, Flutter, Expo, Android and iOS(Swift).
The SDK will take care of the rest.
Whenever you want to force upgrade a version just create a version entry in app upgrade dashboard.
You can also integrate using API. Just call the appupgrade api from your app with the required details such as your app version, platform, environment and app name.
The API will return you the details.. that this app needs to be updated or not.
Based on the response you can show popup in your app.You can call this API when app starts or periodically to check for the update. You can even provide a custom message.
API response:
See the response has force update true. So handle in the app by showing popup.
You can find the complete user documentation here. https://appupgrade.dev/docs
Thanks.