[英](react-native-tab-view) Using navigation.navigate in a TabBar?
我對 React Native 完全陌生,我正在為我們的一個客戶構建一個應用程序。
我創建了一個屏幕,顯示可以按字母順序顯示或按類別分組的名稱列表。 我使用react-native-tab-view
組件來完成這項工作。 這兩個選項卡中的每一個都呈現各自的屏幕組件ScreenMapAlpha
(顯示 FlatList)和ScreenMapCategory
(顯示 SectionList)。
對於這些列表的每個renderItem
道具,我想使用 TouchableOpacity 使每個項目都可以點擊成為詳細信息頁面,但是我無法讓 navigation.navigate() function 工作,因為我不斷收到此消息:
TypeError: undefined is not an object(評估'_this3.props.navigation.navigate')
我一直在閱讀react-native-tab-view Github 文檔,但我找不到將導航 object 傳遞到兩個 Alpha/Category 屏幕組件以使其工作的方法。
我的代碼如下所示:
import * as React from 'react';
import { StyleSheet, Text, View, Dimensions } from 'react-native';
import ScreenMapAlpha from '../screens/map_alpha';
import ScreenMapCategory from '../screens/map_cat';
import { TabView, TabBar, SceneMap } from 'react-native-tab-view';
const initialLayout = { width: Dimensions.get('window').width };
const renderTabBar = props => (
<TabBar
{...props}
indicatorStyle={{ backgroundColor: '#fff' }}
style={{ backgroundColor: '#c00' }}
/>
);
export default function ScreenMap({ navigation }) {
const [index, setIndex] = React.useState(0);
const [routes] = React.useState([
{ key: 'first', title: 'Alphabetical' },
{ key: 'second', title: 'Category' }
]);
const renderScene = SceneMap({
first: ScreenMapAlpha,
second: ScreenMapCategory
});
return (
<TabView
navigationState={{index, routes}}
renderScene={renderScene}
onIndexChange={setIndex}
renderTabBar={renderTabBar}
initialLayout={initialLayout}
navigation={navigation}
/>
)
}
map_alpha.js
import React, { useEffect, useState } from 'react';
import { StyleSheet, View, Text, FlatList, Image, TouchableOpacity } from 'react-native';
import TenantListAlpha from '../shared/tableTenantAlpha';
export default function ScreenMapAlpha({ navigation }) {
return (
<View style={styles.container}>
<TenantListAlpha navigation={navigation} />
</View>
)
}
map_cat.js
import React from 'react';
import { StyleSheet, View, Text } from 'react-native';
import TenantListCat from '../shared/tableTenantCat';
export default function ScreenMapCategory({ navigation }) {
return (
<View style={styles.container}>
<TenantListCat navigation={navigation} />
</View>
)
}
我正在為這個應用程序使用 StackNavigator:
mapstack.js
import { createStackNavigator, createTopTabNavigator } from 'react-navigation-stack';
import Map from '../screens/map.js';
import React from 'react';
import CommonHeader from '../shared/header';
import TenantDetail from '../screens/tenant_detail';
const screens = {
Map: {
screen: Map,
navigationOptions: ({ navigation }) => {
return {
headerTitle: () => <CommonHeader navigation={navigation} title="Directory" />
}
}
},
TenantDetail: {
screen: TenantDetail,
navigationOptions: ({ navigation }) => {
return {
//headerTitle: () => <CommonHeader navigation={navigation} title="News" />
headerTitle: () => <Text>Directory</Text>
}
}
}
}
const MapStack = createStackNavigator(screens);
export default MapStack;
我一輩子都想不通 - 如何將導航 object 從父屏幕傳遞到選項卡中的兩個屏幕,以便 navigation.navigate() 工作?
看起來您實際上並沒有使用反應導航。 我會實現它,然后將導航道具傳遞到您的所有屏幕,您還可以使用useNavigation()
掛鈎。
https://github.com/satya164/react-native-tab-view#react-navigation
https://reactnavigation.org/docs/tab-based-navigation
編輯:我強烈建議實施 react-navigation 選項卡視圖包裝器之一,但是您可以通過正確傳遞導航道具來使當前代碼工作。
從 github 頁面你有你的問題: https://github.com/satya164/react-native-tab-view#renderscene-required
If you need to pass additional props, use a custom renderScene function:
const renderScene = ({ route }) => {
switch (route.key) {
case 'first':
return <FirstRoute foo={this.props.foo} />;
case 'second':
return <SecondRoute />;
default:
return null;
}
};
在您的情況下,它看起來像:
const renderScene = ({ route }) => {
switch (route.key) {
case 'first':
return <ScreenMapAlpha navigation={navigation} />;
case 'second':
return <ScreenMapCategory navigation={navigation} />;
default:
return null;
}
};
在 const.js 中創建一個 function
import React from 'react';
import { useNavigation } from '@react-navigation/native';
export const withNavigation = (Component: any) => {
return (props: any) => {
const navigation = useNavigation();
return <Component navigation={navigation} {...props} />;
};
};
import {
withNavigation,
} from '../../helpers/functions';
export default withNavigation(OrgWiseEvents)
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