在类中存在的标头中使用“导航”和“路线”-React-navigation v5 [英] Use 'navigation' and 'route' inside header present in class - React-navigation v5
问题描述
我想切换到V5版本的反应导航感到很困惑。
在v4中,我过去常常传递参数并将它们与:
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 :
- Set:
一起使用
- Set :
this.props.navigation.navigate('MyDestination',{myParam:'value'})
- 获取:
this.props.navigation.getParam('myParam')
在v5中,某些更改了,我现在不能使用 this.props.navigation
,因为应用似乎并不知道它。
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,所以我有了我的App.js仅引用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(我尚未添加TabBar,因为我想要首先修复基本导航):
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
然后进入我的每个页面(使用类进行编码),这是一个示例Home.js(我删除了所有样式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线,我应该使用 const navigation = {this.props}
在 render()
函数之后。
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,使用一个特定的标头中的函数,我必须在 componentDidMount()
函数之后将其绑定,但是 render()
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? (确保在给定的示例中,导航部分中的所有代码都允许轻松使用导航
和 route
,但您了解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,我尝试了很多天来解决我的问题,当我最终决定发布到堆栈上时,我找到了一个解决方案:)。
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遇到性能问题或其他问题,请立即纠正我。我只是发现该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.
因此,在我的Navigation.js文件中,我刚刚通过了导航和路由对象,以使这些对象可用,这要归功于道具我的课程,例如:
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,我只调用 this.props.navigation
或 this.props.route
并从这些对象中收集我所要
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 =()=> {}
。我只是直接在 ComponentDidMount
函数内添加 navigation.setOptions
这段代码:
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>
})
这样做是因为我使用了在类中声明的函数,因此我必须将其绑定在构造函数中,例如 this._goToSettings = this._goToSettings.bind(this)
,然后将其添加到 navigation.setParams
函数。
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头中使用“导航”和“路线”-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!