React native 我正在定位错误:ReferenceError:导航未在react native navigation中定义。我只是在学英语
我正在努力学习react native,但出现以下错误 参考错误:未定义导航 我是一个初学者,你能指导我解决这个错误吗 我也试着改为功能组件,但得到了相同的错误 我用世博会来学习React native 我正在定位错误:ReferenceError:导航未在react native navigation中定义。我只是在学英语,react-native,navigation,react-navigation,React Native,Navigation,React Navigation,我正在努力学习react native,但出现以下错误 参考错误:未定义导航 我是一个初学者,你能指导我解决这个错误吗 我也试着改为功能组件,但得到了相同的错误 我用世博会来学习 import 'react-native-gesture-handler'; import React, { Component } from "react"; import { ActivityIndicator, StyleSheet, Text, View, Image, Button,I
import 'react-native-gesture-handler';
import React, { Component } from "react";
import { ActivityIndicator, StyleSheet, Text, View, Image, Button,ImageBackground } from "react-native";
import { NavigationContainer } from '@react-navigation/native';
import { createStackNavigator } from '@react-navigation/stack';
class HomeScreen extends Component {
render() {
return (
<View style = {styles.container}>
<Text>Hello HomeScreen</Text>
<Button
title="Go to Profile"
onPress={() => navigation.navigate('Profile')}
/>
</View>
);
}
}
class Profile extends Component {
render() {
return (
<View style = {styles.container}>
<Text>Hello profile</Text>
</View>
);
}
}
const Stack = createStackNavigator();
class App extends Component {
render() {
return (
<NavigationContainer>
<Stack.Navigator initialRouteName="HomeScreen">
<Stack.Screen name="Home" component={HomeScreen} />
<Stack.Screen name="Profle" component={Profile} />
</Stack.Navigator>
</NavigationContainer>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: "center",
alignItems : 'center'
},
});
export default App;
导入“反应本机手势处理程序”;
从“React”导入React,{Component};
从“react native”导入{ActivityIndicator,样式表,文本,视图,图像,按钮,ImageBackground};
从'@react-navigation/native'导入{NavigationContainer};
从'@react navigation/stack'导入{createStackNavigator};
类主屏幕扩展组件{
render(){
返回(
你好,主屏幕
navigation.navigate('Profile')}
/>
);
}
}
类概要文件扩展了组件{
render(){
返回(
你好个人资料
);
}
}
const Stack=createStackNavigator();
类应用程序扩展组件{
render(){
返回(
);
}
}
const styles=StyleSheet.create({
容器:{
弹性:1,
辩护内容:“中心”,
对齐项目:“中心”
},
});
导出默认应用程序;
您使用的是基于类的组件,因此请使用this.props.navigation
<Button
title="Go to Profile"
onPress={() => this.props.navigation.navigate('Profile')}
/>
this.props.navigation.navigate('Profile')}
/>