在类中存在的标题内使用“导航"和“路由" - React-navigation v5 [英] Use 'navigation' and 'route' inside header present in class - React-navigation v5
问题描述
我被卡住了，因为我想切换到 V5 版本的 react-navigation.在 v4 中，我曾经传递我的参数并将它们用于:
I'm stuck as I want to switch to the V5 version of react-navigation. With v4, I used to pass my params and use them with :
- 设置:
this.props.navigation.navigate('MyDestination', {myParam: 'value'})
- 获取:
this.props.navigation.getParam('myParam')
在 v5 中，有些事情发生了变化，我现在无法使用 this.props.navigation，因为应用似乎不知道它.
With v5, some things changed and I now can't use the this.props.navigation since it's not seemed to be known by the app.
我的代码被拆分了，所以我的 App.js 只引用了 Navigation 类:
My code is splitted so I have my App.js that only refer to the Navigation class :
import React from 'react';
import { StyleSheet, Text, View } from 'react-native'
import Navigation from './navigation/Navigation'
export default function App() {
return (
<Navigation/>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
然后我的导航文件包含所有导航机制(我还没有添加我的 TabBar，因为我想先修复基本导航):
Then my Navigation file contains all the navigation mechanism (I did not added my TabBar yet, since I want to fix the base navigation first) :
import { NavigationContainer } from '@react-navigation/native'
import { createStackNavigator } from '@react-navigation/stack'
import { createBottomTabNavigator } from 'react-navigation-tabs'
import { StyleSheet, Image } from 'react-native'
import React from 'react'
import Home from '../components/Home'
import LendList from '../components/LendList'
import AddMoney from '../components/AddMoney'
import AddStuff from '../components/AddStuff'
import Settings from '../components/Settings'
import Test from '../components/Test'
function HomeScreen() {
return(
<Home/>
)
}
function LendListScreen() {
return(
<LendList/>
)
}
const Stack = createStackNavigator()
function App() {
return(
<NavigationContainer>
<Stack.Navigator initialRouteName="Home">
<Stack.Screen name="Home"
component={Home}
options={{ title: "Home Page"}}
/>
<Stack.Screen name="LendList"
component={LendList}
options={{ title: 'Liste' }}
/>
<Stack.Screen name="AddMoney"
component={AddMoney}
options={{ title: "Ajout Money"}}
/>
<Stack.Screen name="AddStuff"
component={AddStuff}
options={{ title: "Ajout Stuff"}}
/>
<Stack.Screen name="Settings"
component={Settings}
options={{ title: "Settings"}}
/>
<Stack.Screen name="Test"
component={Test}
options={{ title: "Test"}}
/>
</Stack.Navigator>
</NavigationContainer>
)
}
export default App
然后是我的每个页面(用类编码)，这里有一个例子，Home.js(我删除了所有 Style 部分以缩短此处显示的代码):
And then come each of my pages (coded with classes), and here is one example, Home.js (I removed all the Style part to shorten the code displayed here) :
import React from 'react'
import { StyleSheet, Text, Image, View, Button, TouchableOpacity } from 'react-native'
import Moment from 'react-moment'
import { CommonActions } from '@react-navigation/native'
import { useNavigation } from '@react-navigation/native'
class Home extends React.Component {
static navigationOptions = () => {
return {
headerRight: () => <TouchableOpacity style={styles.settings_touchable_headerrightbutton}
onPress={() => this.goToSettings()}>
<Image style={styles.settings_image}
source={require('../assets/ic_settings.png')} />
</TouchableOpacity>
}
}
constructor(props) {
super(props)
this._goToSettings = this._goToSettings.bind(this)
}
_updateNavigationParams() {
navigation.setParams({
goToSettings: this._goToSettings
})
}
componentDidMount(){
console.log("navigation")
this._updateNavigationParams()
}
_checkMoneyDetails(navigation){
navigation.navigate('LendList', {type: 'Money'})
}
_checkStuffDetails(navigation){
navigation.navigate('LendList', {type: 'Stuff'})
}
_checkPeopleDetails(navigation){
navigation.navigate('LendList', {type: 'People'})
}
_goToSettings = () => {
navigation.navigate('Settings')
}
render(){
const date = new Date();
const { navigation } = this.props;
return(
<View style={styles.main_container}>
<View style={styles.header_view}>
<Text style={styles.header_text}>GiViToMe</Text>
<Text style={styles.header_text}>Nous sommes le :{' '}
{/* TODO: Penser à gérer ensuite les formats de date étrangers */}
<Moment element={Text} format="DD/MM/YYYY" date={date}/>
</Text>
</View>
<View style={styles.lend_view}>
<Text style={styles.title_lend_text}>Vos prêts :</Text>
<View style={styles.money_stuff_view}>
<View style={styles.money_view}>
<View style={styles.money_data_view}>
<Image source={require('../assets/ic_money.png')} style={styles.home_img} />
<Text>XXX $</Text>
</View>
<Button title='Money' onPress={() => {this._checkMoneyDetails(navigation)}}/>
</View>
<View style={styles.stuff_view}>
<View style={styles.stuff_data_view}>
<Image source={require('../assets/ic_box.png')} style={styles.home_img} />
<Text>XXX objets</Text>
</View>
<Button title='Stuff' onPress={() => {this._checkStuffDetails(navigation)}}/>
</View>
</View>
<View style={styles.people_view}>
<View style={styles.people_data_view}>
<Image source={require('../assets/ic_people.png')} style={styles.home_img} />
<Text>XXX people</Text>
</View>
<Button title='People' onPress={() => {this._checkPeopleDetails(navigation)}}/>
</View>
</View>
<View style={styles.footer_view}>
<Text style={styles.text_footer_view}>a.vescera inc.</Text>
</View>
</View>
)
}
}
export default Home
我的问题是，根据在线文档，我看到要在类中使用导航"或路由"，我应该在render() 函数.
My problem is that, per the online documentation, I saw that to use "navigation" or "route" within a class, I should use the const navigation = { this.props } after the render() function.
这个问题是，要在标头中使用一个特定的函数，我必须在 componentDidMount() 函数之后绑定它，但是 render() 还不知道.
This problem is that, to use one specific function within the header, I have to bind it after the componentDidMount() function, but the value present under render() is not yet known.
我该如何解决这个问题?(确保在给定的示例中，导航部分中的所有代码允许轻松使用 navigation 和 route 但您知道我必须拆分我的代码.
How could I solve this ? (sure that in the given example, having all the code in the navigation part allow to use navigation and route easily but you understand that I have to split my code.
谢谢.
推荐答案
好的，所以每次都一样，我尝试了很多天解决我的问题，当我最终决定在堆栈上发布时，我找到了解决方案:).
Ok, so each time the same, I try many days solving my problem, and when I finally decide to post on stack, I find a solution :).
因此，如果您在查看我的代码时可能会发现一些性能问题或其他问题，请随时纠正我.我刚刚发现这个解决方案解决了我的问题.
So, if there's some performance issue or other you may see by looking at my code, do not hesitate to correct me. I just found that this solution solved my problem.
所以在我的 Navigation.js 文件中，我只是传递了导航和路由对象以使它们可用，这要归功于我的类中的道具，如下所示:
So within my Navigation.js file, I just passed the navigation and route objects to make them usable thanks to the props into my classes, like this :
function App() {
return(
<NavigationContainer>
<Stack.Navigator initialRouteName="Home">
<Stack.Screen name="Home"
component={Home}
options={({route, navigation}) => (
{headerTitle: 'Home Page',
route: {route},
navigation: {navigation}}
)}
/>
</Stack.Navigator>
</NavigatorContainer>
)}
然后在我的课程中，我只需调用 this.props.navigation 或 this.props.route 并从这些对象中收集我需要的东西.
then within my classes I just call to this.props.navigation or this.props.route and gather form these objects what I need.
另一件事是，对于那些将使用此代码构建类似内容的人，我还必须更改显示标题按钮的方式.我不使用 static navigationOptions = () =>{} 了.我只是在 ComponentDidMount 函数中直接添加 navigation.setOptions 一段代码，如下所示:
Other thing is that, for those who would use this code to build something similar, I also had to change the way I display the header button.
I do not use the static navigationOptions = () => {} anymore. I just add directly the navigation.setOptions piece of code within the ComponentDidMount function like this:
navigation.setOptions({
headerRight: () => <TouchableOpacity style={styles.settings_touchable_headerrightbutton}
onPress={() => route.params.goToSettings()}>
<Image style={styles.settings_image}
source={require('../assets/ic_settings.png')} />
</TouchableOpacity>
})
我必须这样做，因为我使用的是在我的类中声明的函数，所以我必须像这样在构造函数中绑定它 this._goToSettings = this._goToSettings.bind(this)，然后将其添加到 navigation.setParams 函数中.
I have to do it this way since I'm using a function declared in my class, so I have to bind it in the constructor like this this._goToSettings = this._goToSettings.bind(this) and then add it to the navigation.setParams function.
这篇关于在类中存在的标题内使用“导航"和“路由" - React-navigation v5的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
