Problem: Ich versuche eine einfache App zu erstellen, in der Benutzer mit React Native und Firebase Inhalte ins Internet stellen können. Als ich den Code zum Hochladen der Variablen "postInput" in Firebase hinzugefügt habe, habe ich den Fehler "Variable nicht finden: Ref." Ich habe Ref nie als Variable definiert, aber ich denke, es sollte automatisch funktionieren, wenn ich * von Firebase importiere. Ich weiß nicht, warum das so ist und ich würde etwas Hilfe lieben.React Native/Firebase kann die Variable "Ref" nicht finden
Fehler: Variable kann nicht gefunden werden: ref.
Code:
import React, { Component } from 'react';
import { StyleSheet, Text, View, Image, TextInput, ScrollView, TouchableHighlight, Button } from 'react-native';
import { Font } from 'expo';
import * as firebase from 'firebase';
var fontLoaded = false;
var postRef = ref.child("posts");
var newPostRef = postsRef.push();
const firebaseConfig = {
apiKey: "__API_KEY__",
authDomain: "candidtwo.firebaseapp.com",
databaseURL: "https://candidtwo.firebaseio.com",
storageBucket: "candidtwo.appspot.com",
};
const firebaseApp = firebase.initializeApp(firebaseConfig);
export default class App extends React.Component {
state = {
fontLoaded: false,
};
componentDidMount() {
Expo.Font.loadAsync({
'JosefinSans-Regular.ttf': require('./JosefinSans-Regular.ttf'),
});
}
constructor(props) {
super(props);
this.state = { postInput: ""}
}
render() {
return (
<View style={styles.container}>
<View style={styles.button}>
<View style={{width: 1, height: 30, backgroundColor: '#e8e8e8'}} />
<Button
onPress={() => this.setState({ fontLoaded: true })}
title="Press Me To Load the App After 15 Seconds!"
color="#fe8200"
accessibilityLabel="Wait 15 seconds and then press me to load the font!"
/>
</View>
{this.state.fontLoaded ? (
<View style={styles.container}>
<Text style={{ fontFamily: 'JosefinSans-Regular', fontSize: 16 }}>
Whats on your mind? Create a post!
</Text>
<TextInput
style={{height:40, width: 320, borderColor: '#303030', borderWidth: 1}}
onChangeText={(postInput)=>this.setState({postInput})}
value={this.state.postInput}
/>
<Button
onPress={() => {
newPostRef.set({ content:this.state.postInput });
this.setState({ postInput: "Your post was succsesfully uploaded! :)" })
}}
title=" + "
color="#fe8200"
/>
<ScrollView>
<View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
<View style={{width: 350, height: 250, backgroundColor: '#1daff1', alignItems: 'center', justifyContent: 'center', borderRadius: 10, paddingLeft: 10, paddingRight:10}} >
<Text style={{ fontFamily: 'JosefinSans-Regular', fontSize: 18, color: '#ffffff', textAlign: 'center'}}>
Why do android phones have higher inital quality than apple phones, but apple phones have a more consistent amount of quality throughout their years?
</Text>
</View>
<View style={{width: 350, height: 40, borderRadius: 10, backgroundColor: '#147aa8', flexDirection: 'row',paddingLeft:5}} >
<Image source={require('./CandidtwoImages/unlove.png')} />
<Text style={{ fontFamily: 'JosefinSans-Regular', fontSize: 18, color: '#ffffff'}}>
3
</Text>
<Image source={require('./CandidtwoImages/undislike.png')} />
<Text style={{ fontFamily: 'JosefinSans-Regular', fontSize: 18, color: '#ffffff'}}>
1
</Text>
<Image source={require('./CandidtwoImages/comments.png')} />
<Text style={{ fontFamily: 'JosefinSans-Regular', fontSize: 18, color: '#ffffff'}}>
8
</Text>
</View>
<View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
<View style={{width: 35, height: 25, backgroundColor: '#147c41', borderRadius: 10}} />
<View style={{width: 35, height: 4, backgroundColor: '#0f582d', borderRadius: 10}} />
<View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
<View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
<View style={{width: 35, height: 25, backgroundColor: '#9dcd46', borderRadius: 10}} />
<View style={{width: 35, height: 4, backgroundColor: '#6c8f31', borderRadius: 10}} />
<View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
<View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
<View style={{width: 35, height: 25, backgroundColor: '#d3832e', borderRadius: 10}} />
<View style={{width: 35, height: 4, backgroundColor: '#935b1e', borderRadius: 10}} />
<View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
</ScrollView>
</View>) : (null) }
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 8,
backgroundColor: '#e8e8e8',
alignItems: 'center'
},
button: {
flex: 1,
backgroundColor: '#e8e8e8',
alignItems: 'center'
},
});
Awseome dank – GIISE