React Native NetInfo always returns offline - ios

Question

I'm currently trying to implement some functionality in my react native app where I use information stored locally if the device is offline, and perform a fetch if the device is online.
I used NetInfo after reading this How to handle network failure in React-Native, when network is off, but unfortunately I ran into an error where NetInfo always returns offline. I found this github issue, which recommended that I change the host in RCTReachability.m from 'htpp://apple.com' to 'apple.com'. However, I couldn't find a file with that name in the project directory. Instead I found the only mention of 'apple.com' in any file, which was in RCTNetInfo.m, which was in the correct form.
Does anybody know a way to fix this problem? Or possibly a different way to go about performing one action if the device is online, and another if the device is offline?
Here's the relevant code:
fetchData() {
NetInfo.isConnected.fetch().done((isConnected) => {
console.log('First, is ' + (isConnected ? 'online' : 'offline'));
if ( isConnected )
{
fetch(REQUEST_URL)
.then((response) => response.json())
.then((responseData) => {
store.save('contacts', responseData.feed.entry)
.then(() => store.get('contacts'))
.then((contacts) => {
this.setState({
dataSource: this.state.dataSource.cloneWithRows(contacts),
isLoading: false
});
})
})
.catch((error) => { console.error(error); });
}
else
{
store.get('contacts')
.then(contacts => {
if (contacts == null)
{
this.setState({
dataSource: this.state.dataSource.cloneWithRows(CONTACT_DATA),
isLoading: false
});
}
else
{
this.setState({
dataSource: this.state.dataSource.cloneWithRows(contacts),
isLoading: false
});
}
})
}
});
}