rn 路由传参、navigation传参

傷城~ 2021-07-24 16:57 1404阅读 0赞

路由传参:
    	(1)传参数
    			(1)发送
    			
    				函数式传递
    				function xx({navigation})
    				{
    						...
    							//发送
    						{navigation.navigate('路由名',{键值对})}	
    				  }
    				  
    				 路由声明处传递
    				 <Stack.Screen name="xx" component={x} initialParams={
       {键值对}}/>
    				  
    			(2)接收
    				1、函数式组件
    				function xx({navigation,route})
    				{
    						...
    							//接收
    						{JSON.stringify(route.params.键名)}	
    				  }
    				
    			2、类组件
    			export default class xx extends Component{
    				...
    				const {route} = this.props
    				...
    				{JSON.stringify(route.params.键名)}	
    			}
    		其中:
    			(1)接收参数最好使用JSON.stringify将参数序列化成字符串(官方推荐),能做到深度链接
    			(2)可传参数{route.params?.键名}; 当参数存在时才显示,多用于下一个屏幕传递到上一个屏幕
    
    navigation传参：
    	this.props.navigation.setParams({键值对});
    	this.props.navigation.getParam('键名');

代码示例:

import 'react-native-gesture-handler';
    import React,{ Component} from 'react'
    import { Text,View,StyleSheet,Button,ScrollView} from 'react-native'
    import {  NavigationContainer } from '@react-navigation/native';
    import {  createStackNavigator } from '@react-navigation/stack';
    import A from './App21'
    
    function Home({  navigation,route }){ 
    
        return (
            <View style={ {  flex:1, alignItems: 'center', justifyContent: 'center' }}>
              <Text>Home Screen</Text>
              <Text>{ route.params?.address}</Text>
              <Button
                    title="Go to Details"
                    //导航,相当于go,相当页面不会放进栈里
                    onPress={ () =>navigation.navigate('Details',{ name:'jeff',pass:'123'})}
                    color='red'
                    
                ></Button>
              <Button
                title="Go to A"
                //push会将路由放进堆栈里即使是相同页面
                onPress={ () => navigation.navigate('A',{ id:'2'})}
              />
    
            </View>
          );
    }
    function DetailsScreen({ navigation,route}) { 
        return (
          <View style={ {  flex:1,alignItems: 'center', justifyContent: 'center' }}>
            <Text>Details Screen</Text>
            <Text>{ JSON.stringify(route.params.name)}</Text>
            <Text>{ JSON.stringify(route.params.pass)}</Text>
            <Text>{ JSON.stringify(route.params.sex)}</Text>
            <Button
            title="Go to Details... again"
            //push会将路由放进堆栈里即使是相同页面
            onPress={ () => navigation.push('Details')}
          />
          <Button
            title="Go Back"
            //push会将路由放进堆栈里即使是相同页面
            onPress={ () => navigation.navigate('Home',{ address:'heart'})}
          />
          
    
          </View>
        );
      }
      function New({ navigation}) { 
        return (
          <View style={ {  flex: 1, alignItems: 'center', justifyContent: 'center' }}>
            <Text>New Screen</Text>
          </View>
        );
      }
    
    
    
    export default class App extends Component{ 
        render(){ 
            const Stack = createStackNavigator();
            return (
                <>
                    <NavigationContainer>
                        <Stack.Navigator initialRouteName="Home">
                            <Stack.Screen name="Home" component={ Home} options={ {  title: 'Overview' }}/>
                            <Stack.Screen name="Details" component={ DetailsScreen} initialParams={ { sex:'female'}}/>
                            <Stack.Screen name="New" component={ New} />
                            <Stack.Screen name="A" component={ A} />
                        </Stack.Navigator>
                    </NavigationContainer>
                    
                </>
        
            );
        }
      }

类组件:

import React,{ Component} from 'react'
    import { View,Text,StyleSheet,Button} from 'react-native'
    import FontAwesome from 'react-native-vector-icons/dist/FontAwesome'
    
    export default class App extends Component{ 
    
        render(){ 
            const { navigation,route}=this.props
            return(
                <>
                   <Text>哈哈哈</Text>
                   <Text>{ route.params.id}</Text>
                   <Button 
                   title='go details'
                    onPress={ ()=>navigation.navigate('Details')}
                   />   
                </>
            )
        }
    }