ios - iOS:NetInfo.isConnected始终返回false

Question

netInfo React Native总是在ios模拟器中返回false

NetInfo.isConnected.fetch().then(isConnected => {
    if (isConnected == true) {
        this.setState({isOnline: true})
        this.checkForToken()
    }
    else {
        this.setState({isOnline: false})
        this.checkTokenOffline()
    }
});

NetInfo.isConnected.fetch().then().done(() => {
    NetInfo.isConnected.addEventListener('connectionChange', (isConnected) => this.dispatchConnected());
})

Answer 1

这是known bug，它总是给出false。您需要附加一个侦听器，然后使用它。

yourFunction = () => {
    NetInfo.isConnected.fetch().then(isConnected => {
        //Always false, so ignore/do nothing here
    });
    NetInfo.isConnected.addEventListener(
        'connectionChange',
        this.handleFirstConnectivityChange
    );
}

handleFirstConnectivityChange = (isConnected) => {
    if (isConnected == true) {
        this.setState({isOnline: true})
        this.checkForToken()
    }
    else {
        this.setState({isOnline: false})
        this.checkTokenOffline()
    }
}