[英]How to export a class using DrawerNavigation and import it in another class in React-native?
在我的React-Native項目中,我將App.js文件作為我的默認類。 在這個類我使用了DrawerNavigation。 在這里,我提供了我的App.js類的代碼 -
App.js
import React, { Component } from 'react';
import { View, Image, TouchableOpacity } from 'react-native';
import {
createDrawerNavigator,
createStackNavigator,
createAppContainer,
} from 'react-navigation';
import Screen1 from './pages/Screen1';
import Screen2 from './pages/Screen2';
import Screen3 from './pages/Screen3';
class NavigationDrawerStructure extends Component {
toggleDrawer = () => {
this.props.navigationProps.toggleDrawer();
};
render() {
return (
<View style={{ flexDirection: 'row' }}>
<TouchableOpacity onPress={this.toggleDrawer.bind(this)}>
{/*Donute Button Image */}
<Image
source={require('./image/drawer.png')}
style={{ width: 25, height: 25, marginLeft: 5 }}
/>
</TouchableOpacity>
</View>
);
}
}
const FirstActivity_StackNavigator = createStackNavigator({
First: {
screen: Screen1,
navigationOptions: ({ navigation }) => ({
title: 'Demo Screen 1',
headerLeft: <NavigationDrawerStructure navigationProps={navigation} />,
headerStyle: {
backgroundColor: '#FF9800',
},
headerTintColor: '#fff',
}),
},
});
const Screen2_StackNavigator = createStackNavigator({
Second: {
screen: Screen2,
navigationOptions: ({ navigation }) => ({
title: 'Demo Screen 2',
headerLeft: <NavigationDrawerStructure navigationProps={navigation} />,
headerStyle: {
backgroundColor: '#FF9800',
},
headerTintColor: '#fff',
}),
},
});
const Screen3_StackNavigator = createStackNavigator({
Third: {
screen: Screen3,
navigationOptions: ({ navigation }) => ({
title: 'Demo Screen 3',
headerLeft: <NavigationDrawerStructure navigationProps={navigation} />,
headerStyle: {
backgroundColor: '#FF9800',
},
headerTintColor: '#fff',
}),
},
});
const DrawerNavigatorExample = createDrawerNavigator({
Screen1: {
//Title
screen: FirstActivity_StackNavigator,
navigationOptions: {
drawerLabel: 'Demo Screen 1',
},
},
Screen2: {
//Title
screen: Screen2_StackNavigator,
navigationOptions: {
drawerLabel: 'Demo Screen 2',
},
},
Screen3: {
//Title
screen: Screen3_StackNavigator,
navigationOptions: {
drawerLabel: 'Demo Screen 3',
},
},
});
export default createAppContainer(DrawerNavigatorExample);
現在,問題是我想將另一個類作為我的默認類,並且從該類我想要導入App.js然后啟動App.js類。 但是在App.js類中我已經有一個導出 -
export default createAppContainer(DrawerNavigatorExample);
在React-native中,它不允許我導出多個模塊。 所以,如果我想導出App.js文件並在另一個類的View中使用它,那么我該怎么做呢?
您只能導出一個模塊作為默認值。
你只能使用export
export const AppRoute = createAppContainer(DrawerNavigatorExample);
導入它
import { AppRoute } from 'App.js';
我認為您可以像這樣導出默認類:
import React, { Component } from 'react';
import { View, Image, TouchableOpacity } from 'react-native';
import {
createDrawerNavigator,
createStackNavigator,
createAppContainer,
} from 'react-navigation';
import Screen1 from './pages/Screen1';
import Screen2 from './pages/Screen2';
import Screen3 from './pages/Screen3';
class NavigationDrawerStructure extends Component {
toggleDrawer = () => {
this.props.navigationProps.toggleDrawer();
};
render() {
return (
<View style={{ flexDirection: 'row' }}>
<TouchableOpacity onPress={this.toggleDrawer.bind(this)}>
{/*Donute Button Image */}
<Image
source={require('./image/drawer.png')}
style={{ width: 25, height: 25, marginLeft: 5 }}
/>
</TouchableOpacity>
</View>
);
}
}
const FirstActivity_StackNavigator = createStackNavigator({
First: {
screen: Screen1,
navigationOptions: ({ navigation }) => ({
title: 'Demo Screen 1',
headerLeft: <NavigationDrawerStructure navigationProps={navigation} />,
headerStyle: {
backgroundColor: '#FF9800',
},
headerTintColor: '#fff',
}),
},
});
const Screen2_StackNavigator = createStackNavigator({
Second: {
screen: Screen2,
navigationOptions: ({ navigation }) => ({
title: 'Demo Screen 2',
headerLeft: <NavigationDrawerStructure navigationProps={navigation} />,
headerStyle: {
backgroundColor: '#FF9800',
},
headerTintColor: '#fff',
}),
},
});
const Screen3_StackNavigator = createStackNavigator({
Third: {
screen: Screen3,
navigationOptions: ({ navigation }) => ({
title: 'Demo Screen 3',
headerLeft: <NavigationDrawerStructure navigationProps={navigation} />,
headerStyle: {
backgroundColor: '#FF9800',
},
headerTintColor: '#fff',
}),
},
});
export const DrawerNavigatorExample = createAppContainer({
Screen1: {
//Title
screen: FirstActivity_StackNavigator,
navigationOptions: {
drawerLabel: 'Demo Screen 1',
},
},
Screen2: {
//Title
screen: Screen2_StackNavigator,
navigationOptions: {
drawerLabel: 'Demo Screen 2',
},
},
Screen3: {
//Title
screen: Screen3_StackNavigator,
navigationOptions: {
drawerLabel: 'Demo Screen 3',
},
},
});
export default new NavigationDrawerStructure();
比,你可以像這樣導入:
import { DrawerNavigatorExample }, NavigationDrawerStructure from './App.js';
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.