ici Dans ce code, je suis renseigné sur les données JSON sur ListView .. Et après cliquez sur la valeur de l'article, en passant cette valeur particulière sur le nouvel écran ... J'ai créé la MainAlactivité où je renseigne la valeur JSON et sur la valorisation de l'article d'origine sélectionnée, Pour naviguer entre la classe, j'utilise
import React, { Component } from 'react';
import { StyleSheet, Text, View, ListView, ActivityIndicator } from 'react-native';
import { StackNavigator } from 'react-navigation';
class MainActivity extends Component {
constructor(props) {
super(props);
this.state = {
// Default Value of this State.
Loading_Activity_Indicator: true
}
}
componentDidMount() {
return fetch('https://reactnativecode.000webhostapp.com/FruitsList.php')
.then((response) => response.json())
.then((responseJson) => {
let ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
this.setState({
Loading_Activity_Indicator: false,
dataSource: ds.cloneWithRows(responseJson),
}, function() {
// In this block you can do something with new state.
});
})
.catch((errorMsg) => {
console.error(errorMsg);
});
}
ListViewItemSeparator = () => {
return (
<View
style={{
height: .5,
width: "100%",
backgroundColor: "#000",
}}
/>
);
}
Navigate_To_Second_Activity=(fruit_name)=>
{
//Sending the JSON ListView Selected Item Value On Next Activity.
this.props.navigation.navigate('Second', { JSON_ListView_Clicked_Item: fruit_name });
}
static navigationOptions =
{
title: 'MainActivity',
};
render()
{
if (this.state.Loading_Activity_Indicator) {
return (
<View style={styles.ActivityIndicator_Style}>
<ActivityIndicator size = "large" color="#009688"/>
</View>
);
}
return (
<View style={styles.MainContainer}>
<ListView
dataSource={this.state.dataSource}
renderSeparator= {this.ListViewItemSeparator}
renderRow={(rowData) => <Text style={styles.rowViewContainer}
onPress={this.Navigate_To_Second_Activity.bind(this, rowData.fruit_name)} >{rowData.fruit_name}</Text>}
/>
</View>
);
}
}
class SecondActivity extends Component
{
static navigationOptions =
{
title: 'SecondActivity',
};
render()
{
return(
<View style = { styles.MainContainer }>
<Text style = { styles.TextStyle }> { this.props.navigation.state.params.JSON_ListView_Clicked_Item } </Text>
</View>
);
}
}
export default MyNewProject = StackNavigator(
{
First: { screen: MainActivity },
Second: { screen: SecondActivity }
});
const styles = StyleSheet.create(
{
MainContainer:
{
justifyContent: 'center',
flex:1,
margin: 10
},
TextStyle:
{
fontSize: 23,
textAlign: 'center',
color: '#000',
},
rowViewContainer:
{
fontSize: 17,
paddingRight: 10,
paddingTop: 10,
paddingBottom: 10,
},
ActivityIndicator_Style:
{
flex: 1,
alignItems: 'center',
justifyContent: 'center',
left: 0,
right: 0,
top: 0,
bottom: 0,
}
});
3 Réponses :
Stacknavigator strong> est obsolète, vous devriez utiliser CreatestAnnavigator Strong> Plus d'infos à: https://reactnavigation.org/docs/fr/stact-navigator.html p> Edit: P> import { createStackNavigator } from 'react-navigation'
export default MyNewProject = createStackNavigator (
{
First: { screen: MainActivity },
Second: { screen: SecondActivity }
});
Pourriez-vous s'il vous plaît jeter un oeil sur mon code et m'aider
C'est exactement ce que j'ai fait, changez votre "Stacknavigator" à "CreaStacknavigator" et importer sur la navigation de réaction
J'ai utilisé Createstacknavigator dans mon application qui fonctionne, mais pour cette page, ce n'est pas en train de fonctionner ..
Exactement, vous n'utilisez pas CreaStacknavigator ... mal à jour ma réponse
Changez votre code à ceci.
Essayez ce code
import React, { Component } from 'react';
import { StyleSheet, Text, View, ListView, ActivityIndicator } from 'react-native';
import { createStackNavigator } from 'react-navigation'
class MainActivity extends Component {
constructor(props) {
super(props);
this.state = {
// Default Value of this State.
Loading_Activity_Indicator: true
}
}
componentDidMount() {
return fetch('https://reactnativecode.000webhostapp.com/FruitsList.php')
.then((response) => response.json())
.then((responseJson) => {
let ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
this.setState({
Loading_Activity_Indicator: false,
dataSource: ds.cloneWithRows(responseJson),
}, function() {
// In this block you can do something with new state.
});
})
.catch((errorMsg) => {
console.error(errorMsg);
});
}
ListViewItemSeparator = () => {
return (
<View
style={{
height: .5,
width: "100%",
backgroundColor: "#000",
}}
/>
);
}
Navigate_To_Second_Activity=(fruit_name)=>
{
//Sending the JSON ListView Selected Item Value On Next Activity.
this.props.navigation.navigate('Second', { JSON_ListView_Clicked_Item: fruit_name });
}
static navigationOptions =
{
title: 'MainActivity',
};
render()
{
if (this.state.Loading_Activity_Indicator) {
return (
<View style={styles.ActivityIndicator_Style}>
<ActivityIndicator size = "large" color="#009688"/>
</View>
);
}
return (
<View style={styles.MainContainer}>
<ListView
dataSource={this.state.dataSource}
renderSeparator= {this.ListViewItemSeparator}
renderRow={(rowData) => <Text style={styles.rowViewContainer}
onPress={this.Navigate_To_Second_Activity.bind(this, rowData.fruit_name)} >{rowData.fruit_name}</Text>}
/>
</View>
);
}
}
class SecondActivity extends Component
{
static navigationOptions =
{
title: 'SecondActivity',
};
render()
{
return(
<View style = { styles.MainContainer }>
<Text style = { styles.TextStyle }> { this.props.navigation.state.params.JSON_ListView_Clicked_Item } </Text>
</View>
);
}
}
export default MyNewProject = createStackNavigator (
{
First: { screen: MainActivity },
Second: { screen: SecondActivity }
});
const styles = StyleSheet.create(
{
MainContainer:
{
justifyContent: 'center',
flex:1,
margin: 10
},
TextStyle:
{
fontSize: 23,
textAlign: 'center',
color: '#000',
},
rowViewContainer:
{
fontSize: 17,
paddingRight: 10,
paddingTop: 10,
paddingBottom: 10,
},
ActivityIndicator_Style:
{
flex: 1,
alignItems: 'center',
justifyContent: 'center',
left: 0,
right: 0,
top: 0,
bottom: 0,
}
});