Reputation: 83
App.js:
import React, { Component } from 'react';
import {View,Text} from 'react-native';
import { createDrawerNavigator } from 'react-navigation-drawer';
import {createAppContainer} from 'react-navigation';
import Epics from './screens/tmp';
import Pager from './screens/Pager';
const DrawerNavigator = createDrawerNavigator({
Home: {screen: Epics},
Page: {screen: Pager}
},{initialRouteName: 'Home'});
const Stack = createAppContainer(DrawerNavigator);
export default class App extends Component {
render() {
return <Stack />;
}
}
Trying to navigate to a screen through a custom component:
import { ActivityIndicator, Image, StyleSheet, View, TouchableHighlight } from 'react-native';
import PropTypes from 'prop-types';
import React from 'react';
import { useNavigation } from 'react-navigation-hooks';
import AuthorRow from './AuthorRow';
export default class Card extends React.Component {
static propTypes = {
fullname: PropTypes.string.isRequired,
image: Image.propTypes.source.isRequired,
linkText: PropTypes.string.isRequired,
onPressLinkText: PropTypes.func.isRequired,
epicId: PropTypes.string.isRequired,
};
state = {
loading: true,
};
getNav(){
return useNavigation();
}
handleLoad = () => {
this.setState({ loading: false });
};
render() {
const { fullname, image, linkText, onPressLinkText, epicId, prop } = this.props;
const { loading } = this.state;
return (
<View>
<AuthorRow
fullname={fullname}
linkText={linkText}
onPressLinkText={onPressLinkText}
/>
<TouchableHighlight onPress={() => this.getNav().navigate('Pager')} underlayColor="white">
<View style={styles.image}>
{loading && (
<ActivityIndicator style={StyleSheet.absoluteFill} size={'large'} />
)}
<Image
style={StyleSheet.absoluteFill}
source={image}
onLoad={this.handleLoad}
/>
</View>
</TouchableHighlight>
</View>
);
}
}
const styles = StyleSheet.create({
image: {
aspectRatio: 1,
backgroundColor: 'rgba(0,0,0,0.02)',
},
});
From above code, trying to navigate using:
import { useNavigation } from 'react-navigation-hooks';
getNav(){ return useNavigation(); }
this.getNav().navigate('Pager')
It errors our stating: Invariant Violation: Invalid hook call. Hooks can only be called inside of the body of a function component.
How do I navigate using "useNavigation()" or how do I get "this.props.navigation" reference in a component? (I am new to React Native, please help me understand)
I tried using "this.props.navigation" and it gives me undefined error:
Upvotes: 5
Views: 10561
Reputation: 465
@sayog you are breaking the rule of hook brother. Could you try this?
const [loading, setLoading] = useState(false);
const navigation = useNavigation();
make sure you put it after your state declaration
Note: Dont' use class component for Hook. use Functional Component for hook
Upvotes: 3
Reputation: 141
//In Card component remove this
//import { useNavigation } from 'react-navigation-hooks';
//Add this line
import {withNavigation} from 'react-navigation';
class Card extends React.Component {
static propTypes = {
fullname: PropTypes.string.isRequired,
image: Image.propTypes.source.isRequired,
linkText: PropTypes.string.isRequired,
onPressLinkText: PropTypes.func.isRequired,
epicId: PropTypes.string.isRequired,
};
state = {
loading: true,
};
//Remove this
// getNav(){
// return useNavigation();
//}
handleLoad = () => {
this.setState({ loading: false });
};
render() {
const { fullname, image, linkText, onPressLinkText, epicId, prop } = this.props;
const { loading } = this.state;
return (
<View>
<AuthorRow
fullname={fullname}
linkText={linkText}
onPressLinkText={onPressLinkText}
/>
<TouchableHighlight onPress={() =>
//Make change like this
this.props.navigation.navigate('Pager')} underlayColor="white">
<View style={styles.image}>
{loading && (
<ActivityIndicator style={StyleSheet.absoluteFill} size={'large'} />
)}
<Image
style={StyleSheet.absoluteFill}
source={image}
onLoad={this.handleLoad}
/>
</View>
</TouchableHighlight>
</View>
);
}
}
const styles = StyleSheet.create({
image: {
aspectRatio: 1,
backgroundColor: 'rgba(0,0,0,0.02)',
},
});
//Make change like this
export default withNavigation(Card)
Upvotes: 2
Reputation: 573
here is your mistake
mistake
onPress={() => this.getNav().navigate('Pager')
replace with
onPress={() => this.props.navigation.navigate('Pager')
here is the example
https://reactnavigation.org/docs/navigating/
Another example code
class FirstScreen extends React.Component {
static navigationOptions = {
title: 'First',
}
componentDidMount(){
const {navigate} = this.props.navigation;
navigate('Second');
fetch('http://apiserver').then( (response) => {
navigate('Second');
});
}
render() {
return (
<AppLogo />
);
}
}
const AppNavigator = StackNavigator({
First: {
screen: FirstScreen,
},
Second: {
screen: SecondScreen,
},
});
Upvotes: 1
Reputation: 815
You cannot use hooks inside Class component convert your class component to a functional component or use navigation object for navigations by passing navigation props to your component this.props.navigation.navigate('screenName')
Upvotes: 0