How can I test the Internet connection in a react native iOS app?
One approach to check the Internet connection status is by using the following code:
NetInfo.isConnected.fetch().then(isConnected => {
console.log(isConnected);
});
This code snippet generally works well for react native android applications. However, there seems to be an issue as it consistently returns 'false' when used in a react native iOS environment.
Currently, there is an ongoing issue related to this topic on React Native's GitHub page.
You can find more details in the discussion, but essentially, the fetch method always returns false. However, you can implement a workaround by monitoring the connection changed event.
Here is an example code snippet from the discussion:
componentDidMount() {
NetInfo.isConnected.addEventListener('change', this.handleConnectionChange);
NetInfo.isConnected.fetch().done(
(isConnected) => { this.setState({ status: isConnected }); }
);
}
componentWillUnmount() {
NetInfo.isConnected.removeEventListener('change', this.handleConnectionChange);
}
handleConnectionChange = (isConnected) => {
this.setState({ status: isConnected });
console.log(`is connected: ${this.state.status}`);
}
Note:
It appears that progress has been made on addressing this issue in recent commits.
Additionally, the event type change has now been renamed to connectionChange. Here is the updated workaround code:
componentDidMount() {
NetInfo.isConnected.addEventListener('connectionChange', this.handleConnectionChange);
NetInfo.isConnected.fetch().done(
(isConnected) => { this.setState({ status: isConnected }); }
);
}
componentWillUnmount() {
NetInfo.isConnected.removeEventListener('connectionChange', this.handleConnectionChange);
}
handleConnectionChange = (isConnected) => {
this.setState({ status: isConnected });
console.log(`is connected: ${this.state.status}`);
}
Update:
The event type change is no longer recommended. It is advised to use the connectionChange event type instead.
Utilizing this component allows you to receive real-time updates on network status changes.
const unsubscribe = NetInfo.addEventListener(state => {
console.log("Is connected?", state.isConnected);
});
You can also determine if the internet is accessible through the current network connection.
console.log("Is Internet Reachable?", state.isInternetReachable);
I have provided a tutorial on utilizing react-native-netinfo and its functionalities with accompanying source code in this video.
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