首次登录时，业务ID将为null，然后在WebViewPage调用后，我将值存储在业务ID和资源ID中。最初它没有任何价值，我对如何处理这种情况感到困惑。我想在DefaultPreference存储后从它检索业务ID和资源ID，但是我遇到了以上错误。任何帮助将不胜感激。谢谢。
import React from 'react';
import {View,ImageBackground, Image, Platform} from 'react-native';
import NetInfo from "@react-native-community/netinfo"
import DefaultPreference from 'react-native-default-preference';
export default class SplashScreen extends React.Component {
constructor(props) {
super(props);
var SharedPreferences = require('react-native-shared-preferences');
if (Platform.OS === 'android') {
SharedPreferences.getItems(["business_entity_id","resorce_id","userid"],(values) => {
console.log("after");
const business_entity_id = values[0]
if (business_entity_id === null)
{
business_entity_id = ""
}
const resorce_id = values[1]
if (resorce_id === null)
{
resorce_id = ""
}
console.log(business_entity_id);
setTimeout(() => {
load();
}, 2000);
load = () => {
let internetconnection = NetInfo.addEventListener(state => {
if (state.isConnected === true)
{
console.log(business_entity_id);
if (business_entity_id == "" && resorce_id == "") {
props.navigation.navigate('PracticeCode');
}
else if(resorce_id == "")
{
props.navigation.navigate('DoctorDetails');
}
else {
console.log("next")
props.navigation.navigate('Calendar');
}
}
else {
Alert.alert("Alert",
"Please check your Internet Connection");
}
});
};
});
}
else{
setTimeout(() => {
load();
}, 2000);
load = () => {
let internetconnection = NetInfo.addEventListener(state => {
if (state.isConnected === true)
{
DefaultPreference.get('business_entity_id').then(function(value) {console.log(value)});
DefaultPreference.get('userid').then(function(value) {console.log("userid",value)});
props.navigation.navigate('PracticeCode');
}
else {
Alert.alert("Alert",
"Please check your Internet Connection");
}
});
};
}
}
render() {
return (
<View style={ {
width: '100%'
}}>
<View>
<ImageBackground source={require('./../assets/bg.jpg')} style={ {
resizeMode: "cover",
justifyContent: "center",
alignItems: 'center',
width: '100%',
height: '100%'
}}>
<View style={{
position: "absolute",
left: 0,
width: '100%',
height: '100%',
backgroundColor: '#fff',
opacity: 0.9
}}></View>
<Image style={ {
width: 250,
resizeMode: 'cover'
}} source={require('./../assets/splash.png')} />
</ImageBackground>
</View>
</View>
);
}
}