错误：找不到变量Stack，React Navigation

Question

我正在尝试使用react native开发一个todolist应用，为此我编写了主屏幕。 Iam使用React Navigation。我正在关注文档，但它给了我这个错误。请帮忙。我已经按照以下顺序执行了命令。

expo安装react-native-gesture-handler react-native-reanimated react-native-screens react-native-safe-area-context @ react-native-community / masked-view

npm install @ react-navigation / native

npm install @ react-navigation / stack

这是我的代码。

import React from 'react';
import { StyleSheet, Text, View ,Button} from 'react-native';
import 'react-native-gesture-handler';
import { NavigationContainer } from '@react-navigation/native';
import { createStackNavigator} from '@react-navigation/stack';

class HomeScreen extends React.Component {
  constructor(props){
    super(props);
    this.state={}
  }
  render(){
    return(
      <View>
      <View style={{margin:50}}>
        <Button title="New Task"></Button>
      </View>
    </View>
    )
  }
}

export default function App() {
  return (
    <NavigationContainer>
      <Stack.Navigator>
        <Stack.Screen name="Home" component={HomeScreen} />
      </Stack.Navigator>
    </NavigationContainer>
  );
}

Answer 1

您未在程序中声明堆栈，请在程序中包括此行：

const Stack = createStackNavigator();

像这样在您的App函数中添加此行：

export default function App() {
  const Stack = createStackNavigator();
  return (
    <NavigationContainer>
      <Stack.Navigator>
        <Stack.Screen name="Home" component={HomeScreen} />
      </Stack.Navigator>
    </NavigationContainer>
  );
}

希望这会有所帮助！