Question

在移动设备中运行以下react-native代码后，显示错误。错误是：

“ TypeError：null不是对象（正在评估'_RNGestureHandlerModule.default.Direction'）”。

我已经安装了运行该应用程序所需的所有库。请帮助我解决我的错误。代码是：

App.js

import 'react-native-gesture-handler';
import * as React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import { createStackNavigator } from '@react-navigation/stack';
import HomeScreen from './modules/HomeScreen';
import SecondScreen from './modules/SecondScreen';
const Stack = createStackNavigator();
function App() {
return (
<NavigationContainer>
  <Stack.Navigator>

    <Stack.Screen name="Home" component={HomeScreen} />

    <Stack.Screen name="Second" component={SecondScreen} />

  </Stack.Navigator>
</NavigationContainer>
);
}

export default App;

HomeScreen.js：

import 'react-native-gesture-handler';
import * as React from 'react';
import { StyleSheet, Text, View, Button } from 'react-native';
function HomeScreen({ navigation }) {
navigateToScreen=()=>{
navigation.navigate('Second');
}
return (
<View style={styles.MainContainer}>
  <Text style={styles.text}> Home Screen </Text>
  <Button onPress={this.navigateToScreen} title="Navigate To Second Screen" /> 
</View>
);
}
const styles = StyleSheet.create({
MainContainer: {
flex: 1,
justifyContent: 'center',
alignItems: 'center'
},

text: {
textAlign: 'center',
margin: 18,
fontSize: 24,
fontWeight: "200",
},
});
export default HomeScreen ;

SecondScreen.js

import 'react-native-gesture-handler';
import * as React from 'react';
import { StyleSheet, Text, View } from 'react-native';
function SecondScreen() {
return (
<View style={styles.MainContainer}>
  <Text style={styles.text}> Second Screen </Text>
</View>
);
}
const styles = StyleSheet.create({
MainContainer: {
flex: 1,
justifyContent: 'center',
alignItems: 'center'
},
text: {
textAlign: 'center',
fontSize: 24,
fontWeight: "200",
},
});
export default SecondScreen;

TypeError：null不是对象（正在评估“ _RNGestureHandlerModule.default.Direction”）

0 个答案: