I am trying to pass some row data from a list to next screen to display details but cannot seem to achieve it.
This is how i pass props when navigating like:
_renderRow(row,sectionId, rowId, highlightRow) {
var self = this;
let navigate=this.props.navigation;
return (
<TouchableOpacity onPress={() => navigate('ChatList',{row})}>
........//ignored code
And on the other screen ChatList.js:
import React, { Component } from 'react';
import {
StyleSheet,
Text,
View,
TouchableOpacity,
TextInput,
Image
} from 'react-native';
import { StackNavigator } from 'react-navigation';
const ChatList = () => {
return (
<View>
</View>
);
}
ChatList.navigationOptions = {
//trying to set the title from the data sent around here
title: 'ChatList Title',
headerStyle: {
backgroundColor: '#2196F3',
},
headerTitleStyle: {
color: 'white',
},
headerBackTitleStyle: {
color: 'white',
},
headerTintColor: 'white',
};
export default ChatList
Also to note, i have a different implementation on stacknavigation unlike the docs from reactnavigation .Checkout my entire implementation here https://gist.github.com/SteveKamau72/f04b0a3dca03a87d604fe73767941bf2
Here is the full class from which _renderRow resides:
ChatGroup.js
/** ChatGroup.js**/
//This code is component for file App.js to display group of chats
import React, { Component } from 'react';
import {
StyleSheet,
ListView,
Text,
View,
Image,
TouchableOpacity
} from 'react-native';
const data = [
{
name: "Kasarini",
last_chat: {
updated_at:"22:13",
updated_by: "Steve Kamau",
chat_message: "Lorem Ipsum is pretty awesome if you know it"
},
thumbnail: "https://randomuser.me/api/portraits/thumb/men/83.jpg"
},
{
name: "Kabete",
last_chat: {
updated_at:"20:34",
updated_by: "Tim Mwirabua",
chat_message: "Lorem Ipsum is pretty awesome if you know it"
},
thumbnail: "https://randomuser.me/api/portraits/thumb/men/83.jpg"
},
{
name: "Kiambuu",
last_chat: {
updated_at:"19:22",
updated_by: "Maureen Chubi",
chat_message: "Lorem Ipsum is pretty awesome if you know it"
},
thumbnail: "https://randomuser.me/api/portraits/thumb/men/83.jpg"
},
{
name: "UnderPass",
last_chat: {
updated_at:"17:46",
updated_by: "Faith Chela",
chat_message: "Lorem Ipsum is pretty awesome if you know it"
},
thumbnail: "https://randomuser.me/api/portraits/thumb/men/83.jpg"
},
]
export default class UserListView extends Component {
constructor() {
super();
const ds = new ListView.DataSource({rowHasChanged: this._rowHasChanged});
this.state = {
dataSource: ds.cloneWithRows(data)
}
}
render() {
return (
<ListView
dataSource={this.state.dataSource}
renderRow={this._renderRow.bind(this)}
enableEmptySections={true} />
)
}
_renderRow(row,sectionId, rowId, highlightRow) {
var self = this;
return (
<TouchableOpacity activeOpacity={0.9} onPress={() => navigate('ChatList',{ user: 'Lucy' })}>
<View style={styles.container}>
<Image
style={styles.groupChatThumbnail}
source={{uri: row.thumbnail}}/>
<View>
<View style={{flexDirection:'row', justifyContent:'space-between', width:280}}>
<Text style={styles.groupNameText}>{row.name} </Text>
<Text style={styles.groupUpdatedAtText}>{row.last_chat.updated_at}</Text>
</View>
<View style={{ flexDirection:'row', alignItems:'center', marginTop: 5}}>
<Text style={styles.groupUpdatedByText}>{row.last_chat.updated_by} : </Text>
<View style={{flex: 1}}>
<Text ellipsizeMode='tail' numberOfLines={1}style={styles.groupChatMessageText}>{row.last_chat.chat_message} </Text>
</View>
</View>
</View>
</View>
</TouchableOpacity>
)
}
_rowHasChanged(r1, r2) {
return r1 !== r2
}
highlightRow() {
alert('Hi!');
}
}
const styles = StyleSheet.create({
container:{
alignItems:'center',
padding:10,
flexDirection:'row',
borderBottomWidth:1,
borderColor:'#f7f7f7',
backgroundColor: '#fff'
},
groupChatContainer:{
display: 'flex',
flexDirection: 'row',
},
groupNameText:{
marginLeft:15,
fontWeight:'600',
marginTop: -8,
color: '#000'
},
groupUpdatedAtText :{
color:'#333', fontSize:10, marginTop: -5
},
groupChatThumbnail:{
borderRadius: 30,
width: 50,
height: 50 ,
alignItems:'center'
},
groupUpdatedByText:{
fontWeight:'400', color:'#333',
marginLeft:15, marginRight:5
},
});
There are two ways to access navigation props on second screen:
Inside like
navigationOptions = ({navigation}) => ({title:`${navigation.state.params.name}`});
If you access inside any method like render etc is
{user}= this.props.navigation.state.params
ChatList.navigationOptions this could written be as
ChatList.navigationOptions= ({navigation}) => ({// props access here });
and const ChatList = () inside this you can write this.props.navigation.state.params
Related
1
I am a beginner and still learning to react native.
In my react native App, I have 2 screens. In the first page, I have JSON data ; I want to pass this JSON data to the next page.
I used react-navigation for navigating between pages. I need to passed each parameter for a new book screen for each book.
But I couldn't figure out, how to pass JSON data to next page! In BookScreen.js the function "getParam" is not been seen.
First Screen: ExploreScreen.js
import React, { useState, useEffect } from "react";
import {
View,
Text,
StyleSheet,
FlatList,
Image,
TouchableOpacity,
} from "react-native";
export default function ExploreScreen({ navigation, route }) {
const [data, setData] = useState([]);
useEffect(() => {
loadData();
}, []);
const loadData = async () => {
await fetch(
"http://www.json-generator.com/api/json/get/bTvNJudCPS?indent=2"
)
.then((response) => response.json())
.then((receivedData) => setData(receivedData));
};
return (
<View style={styles.container}>
<FlatList
data={data}
renderItem={({ item }) => (
<TouchableOpacity
style={styles.book}
onPress={() => navigation.navigate("Book", item)}
>
<Image
style={styles.bookImage}
source={{ uri: item.book_image }}
></Image>
<View>
<Text style={styles.bookTitleText}>{item.title}</Text>
<Text style={styles.bookAuthor}>{item.author}</Text>
<Text style={styles.bookGenre}>
<Text styles={styles.gen}>Genul: </Text>
{item.genre_id}
</Text>
</View>
</TouchableOpacity>
)}
></FlatList>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: "center",
alignSelf: "center",
paddingVertical: "15%",
},
book: {
flex: 1,
flexDirection: "row",
marginBottom: 3,
},
bookImage: {
width: 100,
height: 100,
margin: 5,
},
bookTitleText: {
color: "#8B0000",
fontSize: 15,
fontStyle: "italic",
fontWeight: "bold",
},
bookAuthor: {
color: "#F41313",
},
});
Second Screen: BookScreen.js
import React from "react";
import { View, Text, StyleSheet } from "react-native";
export default function BookScreen({ navigation, route }) {
const { item } = route.params;
return (
<View style={styles.container}>
<Text style={styles.text}>{navigation.getParam("name")}</Text>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: "center",
alignSelf: "center",
paddingVertical: "100%",
},
text: {
fontSize: 20,
},
});
In your BookScreen, change it to the following:
export default function BookScreen({ navigation, route }) {
const { item } = route.params;
return (
<View style={styles.container}>
<Text style={styles.text}>{item.name}</Text>
</View>
);
}
Edit:
I think you should pass the data like this:
navigation.navigate('Book', {item: item});
In my RN application, I have the following array.
const PDFItems = [
{ id: 1001, name: 'APPLICATION FORM.PDF', size: '2.77 MB' },
{ id: 1002, name: 'BENEFIT ILLUSTRATION.PDF', size: '368 KB' },
{ id: 1003, name: 'PRODUCT SUMMARY.PDF', size: '2.02 MB' },
{ id: 1004, name: 'TERMS AND CONDITIONS.PDF', size: '269 KB' },
];
I created the following function to render items.
renderPDFItems = () => {
return PDFItems.map(item => (
<ListItem
key={item.id.toString()}
icon={<Download />}
title={item.name}
label={item.size}
onPress={() => {}}
/>
));
}
This is my ListItem component.
import React, { Component } from 'react';
import { StyleSheet, TouchableOpacity, View } from 'react-native';
import colors from 'res/colors';
import SinglifeText from './text';
interface IProps {
title: string;
label: string;
icon: Object;
key: string;
onPress?: Function;
}
class ListItem extends Component<IProps> {
render() {
const { title, label, icon, key, onPress } = this.props;
return (
<TouchableOpacity onPress={onPress} key={key}>
<View style={styles.itemContainer}>
<View style={styles.titleContainer}>
<View style={styles.icon}>{icon}</View>
<SinglifeText type={SinglifeText.Types.BUTTON_LBL} label={title} />
</View>
<SinglifeText type={SinglifeText.Types.BODY_SMALL} label={label} />
</View>
</TouchableOpacity>
);
}
}
const styles = StyleSheet.create({
itemContainer: {
borderColor: colors.gray,
borderRadius: 4,
borderWidth: 0.5,
padding: 14,
paddingVertical: 24,
flexDirection: 'row',
alignContent: 'center',
alignItems: 'center',
marginBottom: 10,
},
titleContainer: {
flex: 1,
flexDirection: 'row',
alignContent: 'center',
alignItems: 'center',
},
icon: {
marginRight: 10,
},
});
export default ListItem;
When I run the app, it shows a warning saying that,
key is not a prop. Trying to access it will result in undefined being returned. If you need to access the same value within the child component, you should pass it as a different prop
What am I doing wrong here? My keys are unique and still gives this error.
Just dont name the prop key. Something like id has the same syntactic meaning.
renderPDFItems = () => {
return PDFItems.map(item => (
<ListItem
id={item.id.toString()}
icon={<Download />}
title={item.name}
label={item.size}
onPress={() => {}}
/>
));
}
ListItem.js
class ListItem extends Component<IProps> {
render() {
const { title, label, icon, id, onPress } = this.props;
return (
<TouchableOpacity onPress={onPress} key={id}>
<View style={styles.itemContainer}>
<View style={styles.titleContainer}>
<View style={styles.icon}>{icon}</View>
<SinglifeText type={SinglifeText.Types.BUTTON_LBL} label={title} />
</View>
<SinglifeText type={SinglifeText.Types.BODY_SMALL} label={label} />
</View>
</TouchableOpacity>
);
}
}
It seems your key prop defined is ambiguous to TouchableOpacity key={key}. Try renaming key prop to some other name.
As some guys have said above, we don't need the key prop. TouchableOpacity has the key by default, and we can't use key another prop as 'key'
*hi everyone
i am new in React native programming and Java script i want to build a list item and when i press an item i should go to another screen i used the method onPress *
*but it doesn't work i hope that i will find the answer here as soon as possible: *
import React, { Component } from 'react';
import { AppRegistry, Image , StyleSheet, Text, View } from 'react-native';
import { ListItem } from 'react-native-elements';
import { Icon,navigationOptions } from 'react-native-elements';
export default class HomeScreen extends Component {
goToOtherScreen(ScreenName) {
this.props.navigation.navigate('Item');
}
render() {
let pic = {
uri: 'https://www.lscoiffure.fr/images/assistance.jpg'
};
return (
<View style={styles.container}>
//Image "jai utilisé juste une autre photo pour essayer"
<View>
<Image source={pic} style={{width: 350, height: 200}}
/>
//Text(title)
<View style={{position: 'absolute', left: 0, right: 0, bottom: 0, justifyContent: 'center',marginBottom:20, alignItems: 'center'}}>
<Text style={{color :'#ffffff',fontSize:24}}>Assistance</Text>
</View>
</View>
{
list.map((item, i) => (
<ListItem
key={i}
title={item.title}
leftIcon={{ name: item.icon ,color:'black'}}
onPress={() => this.goToOtherScreen(item.ScreenName)}
/>
))
}
</View>
);
}
}
const list = [
{
title: 'Appeler le service clientèle',
icon: 'perm-phone-msg',
ScreenName : 'SecondScreen',
},
{
title: 'FAQ',
icon: 'help'
},
{
title: 'Conditions et mentions légal',
icon :'error'
},
]
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor:'#ffffff'
},
item: {
padding: 50,
fontSize: 18,
height: 44,
},
})
please help me to know where is my mistake
Change this in your code
goToOtherScreen(ScreenName) {
this.props.navigation.navigate(ScreenName);
}
I did find this question in a few other places, but I'm still unable to resolve the issue with any of the help given. I got most of the code so far from this article -
https://medium.com/#austinhale/building-a-mobile-app-in-10-days-with-react-native-c2a7a524c6b4
Some of the APIs were outdated, but most of them I was able to replace with the new version - One of the APIs i changed that might be notable in regards to this question is stackNavigator -> createStackNavigator
My code is as follows:
Apps.js
import React, { Component } from 'react';
import {
FlatList,
StatusBar,
StyleSheet,
Text,
View
} from 'react-native';
import AppItem from './AppItem';
export default class Apps extends Component {
constructor(props) {
super(props);
this.state = {
apps: [
{
id: 1,
title: 'Good Business',
description: 'Make millions investing in mindtree minds',
thumbnail: 'https://img12.androidappsapk.co/300/f/5/1/com.nse.bse.sharemarketapp.png'
},
{
id: 2,
title: 'Troll WhatsApp SOS ONLY',
description: 'Have a laugh by reading all the comments in the group chat made by your coworkers',
thumbnail: 'http://icons.iconarchive.com/icons/dtafalonso/android-l/256/WhatsApp-icon.png'
}
]
}
}
_renderItem = ({ item }) => (
<AppItem
id={item.id}
title={item.title}
description={item.description}
thumbnail={item.thumbnail}
/>
);
_keyExtractor = (item, index) => item.id.toString();
render() {
return (
<View style={styles.container}>
<StatusBar
barStyle="light-content"
/>
<FlatList
data={this.state.apps}
keyExtractor={this._keyExtractor}
renderItem={this._renderItem}
/>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#F5FCFF',
}
});
router.js
import React, { Component } from 'react';
import { Dimensions, Platform } from 'react-native';
import { createStackNavigator, createBottomTabNavigator } from 'react-navigation';
import { Icon } from 'react-native-elements';
import Apps from './screens/Apps';
import Gallery from './screens/Gallery';
import Garage from './screens/Garage';
import News from './screens/News';
import Support from './screens/Support';
import ViewApp from './screens/ViewApp';
let screen = Dimensions.get('window');
export const Tabs = createBottomTabNavigator({
'Apps': {
screen: Apps,
navigationOptions: {
tabBarLabel: 'Apps',
tabBarIcon: ({ tintColor }) => <Icon raised name="ios-apps-outline" type="ionicon" size={28} color={tintColor} />
},
},
'News': {
screen: News,
navigationOptions: {
tabBarLabel: 'News',
tabBarIcon: ({ tintColor }) => <Icon raised name="newspaper-o" type="font-awesome" size={28} color={tintColor} />
},
},
'Garage': {
screen: Garage,
navigationOptions: {
tabBarLabel: 'Garage',
tabBarIcon: ({ tintColor }) => <Icon raised name="garage" type="material-community" size={28} color={tintColor} />
},
},
'Gallery': {
screen: Gallery,
navigationOptions: {
tabBarLabel: 'Gallery',
tabBarIcon: ({ tintColor }) => <Icon raised name="picture" type="simple-line-icon" size={28} color={tintColor} />
},
},
'Support': {
screen: Support,
navigationOptions: {
tabBarLabel: 'Support',
tabBarIcon: ({ tintColor }) => <Icon raised name="ios-person-outline" type="ionicon" size={28} color={tintColor} />
},
},
});
export const AppsStack = createStackNavigator({
Apps: {
screen: Apps,
navigationOptions: ({ navigation }) => ({
header: null,
}),
},
ViewApp: {
screen: ViewApp,
navigationOptions: ({ navigation }) => ({
header: null,
tabBarVisible: false,
gesturesEnabled: false
}),
},
});
export const createRootNavigator = () => {
return createStackNavigator(
{
AppsStack: {
screen: AppsStack,
navigationOptions: {
gesturesEnabled: false
}
},
Tabs: {
screen: Tabs,
navigationOptions: {
gesturesEnabled: false
}
}
},
{
headerMode: "none",
mode: "modal"
}
);
};
AppItem.js
import React, { Component } from 'react';
import {
StyleSheet,
TouchableOpacity,
Text,
Image,
View
} from 'react-native';
import { Icon } from 'react-native-elements';
import { ViewApp } from './ViewApp';
export default class AppItem extends Component {
_onViewApp = () => {
let id = this.props.id;
this.props.navigation.navigate('ViewApp', { id: id })
}
render() {
return (
<TouchableOpacity onPress={this._onViewApp}>
<View style={styles.rowContainer}>
<Image source={{ uri: this.props.thumbnail }}
style={styles.thumbnail}
resizeMode="contain" />
<View style={styles.rowText}>
<Text style={styles.title} numberOfLines={2} ellipsizeMode={'tail'}>
{this.props.title}
</Text>
<Text style={styles.description} numberOfLines={2} ellipsizeMode={'tail'}>
{this.props.description}
</Text>
</View>
</View>
</TouchableOpacity>
);
}
}
const styles = StyleSheet.create({
rowContainer: {
flexDirection: 'row',
backgroundColor: '#FFF',
height: 100,
padding: 10,
marginRight: 10,
marginLeft: 10,
marginTop: 15,
borderRadius: 4,
shadowOffset: { width: 1, height: 1, },
shadowColor: '#CCC',
shadowOpacity: 1.0,
shadowRadius: 1
},
title: {
paddingLeft: 10,
paddingTop: 5,
fontSize: 16,
fontWeight: 'bold',
color: '#777'
},
description: {
paddingLeft: 10,
marginTop: 5,
fontSize: 14,
color: '#777'
},
thumbnail: {
flex: 1,
height: undefined,
width: undefined
},
rowText: {
flex: 4,
flexDirection: 'column'
}
});
You can change your onPress functionality in AppItem.js like below. Use arrow function inside your onPress onPress={() => this._onViewApp()}. Because Arrow function does not create the context "this". It refers to the context of the component that it was wrapped in. For lexical this refer this Arrow function vs function declaration / expressions: Are they equivalent / exchangeable?
import { Icon } from 'react-native-elements';
import { ViewApp } from './ViewApp';
export default class AppItem extends Component {
_onViewApp(){
let id = this.props.id;
this.props.navigation.navigate('ViewApp', { id: id })
}
render() {
return (
<TouchableOpacity onPress={() => this._onViewApp()}>
<View style={styles.rowContainer}>
<Image source={{ uri: this.props.thumbnail }}
style={styles.thumbnail}
resizeMode="contain" />
<View style={styles.rowText}>
<Text style={styles.title} numberOfLines={2} ellipsizeMode={'tail'}>
{this.props.title}
</Text>
<Text style={styles.description} numberOfLines={2} ellipsizeMode={'tail'}>
{this.props.description}
</Text>
</View>
</View>
</TouchableOpacity>
);
}
}
I wanted to follow up for everyone who's having the same issue. I just included withNavigation from 'react-native-navigation'; and exported at the end of the component like so export default withNavigation(AppItem);.
I'm working on a react native application, and using a DrawerNavigator. Unfortunately I'm not able to change the colour of the header, my SideMenu component looks like this:
import React from 'react';
import {
TouchableHighlight,
View,
ScrollView,
Image,
Platform,
StyleSheet
} from 'react-native';
import {NavigationActions} from 'react-navigation';
import {
RkStyleSheet,
RkText,
RkTheme
} from 'react-native-ui-kitten';
import { MainRoutes } from '../routes/routes';
import { MaterialCommunityIcons } from 'react-native-vector-icons';
import { connect } from 'react-redux';
const mapStateToProps = (state) => {
return {
}
}
class SideMenu extends React.Component {
static navigationOptions = ({navigation}) => {
const { state, setParams } = navigation;
return {
headerTintColor: 'red',
headerLeft: null,
headerStyle: { backgroundColor: 'rgba(77, 90, 139, 1)', shadowColor: 'transparent', borderBottomWidth: 0},
};
};
constructor(props) {
super(props);
this._navigateAction = this._navigate.bind(this);
}
_navigate(route) {
let resetAction = NavigationActions.reset({
index: 0,
actions: [
NavigationActions.navigate({routeName: route.id})
]
});
this.props.navigation.dispatch(resetAction)
}
_renderIcon() {
// if (RkTheme.current.name === 'light')
// return <Image style={styles.icon} source={require('../../assets/images/smallLogo.png')}/>;
// return <Image style={styles.icon} source={require('../../assets/images/smallLogoDark.png')}/>
}
handlePress = (route, index) => {
const { navigation } = this.props;
navigation.navigate(route.id);
}
render() {
let menu = MainRoutes.map((route, index) => {
return (
<TouchableHighlight
style={styles.container}
key={route.id}
underlayColor={RkTheme.current.colors.button.underlay}
activeOpacity={1}
onPress={() => this.handlePress(route, index)}>
<View style={styles.content}>
<View style={styles.content}>
<MaterialCommunityIcons size={25} style={{color: 'white'}} name={route.icon} />
<View style={{flex: 1, alignItems: 'left', paddingLeft: 15}}>
<RkText style={{color:'white'}}>{route.title}</RkText>
</View>
</View>
</View>
</TouchableHighlight>
)
});
return (
<View style={styles.root}>
<ScrollView
showsVerticalScrollIndicator={false}>
<View style={[styles.container, styles.content], {borderTopWidth: 0}}>
{this._renderIcon()}
</View>
{menu}
</ScrollView>
</View>
)
}
}
let styles = RkStyleSheet.create(theme => ({
container: {
height: 80,
paddingHorizontal: 16,
borderTopWidth: StyleSheet.hairlineWidth,
borderColor: 'white',
backgroundColor: 'rgba(77, 90, 139, 1)'
},
root: {
paddingTop: Platform.OS === 'ios' ? 20 : 0,
backgroundColor: 'rgba(77, 90, 139, 1)'
},
content: {
flex: 1,
flexDirection: 'row',
alignItems: 'center'
},
icon: {
marginRight: 13,
}
}));
export default connect(mapStateToProps)(SideMenu);
As you can see I do set the style of the header in the NavigationOptions like I do with the other components but the header stays the same colour.
Could this be because the DrawerNavigator is nested within a TabNavigator?
Thanks and really appreciate any help.
The Navigators are defined as so:
onst SettingsDrawerNavigator = DrawerNavigator(
{
SettingsScreen: {
screen: SettingsScreen
}
},
{
//initialRouteName: 'SettingsScreen',
drawerOpenRoute: 'DrawerOpen',
drawerCloseRoute: 'DrawerClose',
drawerToggleRoute: 'DrawerToggle',
contentComponent: (props) => <SideMenu {...props}/>
}
);
export default TabNavigator(
//Adds elements to the navigator at the bottom.
{
//Other tabs.
Account: {
screen: SettingsDrawerNavigator,
}
},
{
navigationOptions: ({ navigation }) => ({
initialRouteName: 'Home',
tabBarIcon: ({ focused }) => {
const { routeName } = navigation.state;
let iconName;
return (
// <Button badge vertical>
// <Badge ><Text>51</Text></Badge>
<Ionicons
name={iconName}
size={24}
style={{ marginBottom: -3 }}
color={focused ? Colors.tabIconSelected : Colors.tabIconDefault}
/>
// </Button>
);
},
}),
tabBarOptions: {
inactiveBackgroundColor: 'transparent',
activeBackgroundColor: 'transparent',
showLabel: false,
style: {
backgroundColor: '#4d5a8b',
}
},
tabBarComponent: TabBarBottom,
tabBarPosition: 'bottom',
animationEnabled: false,
swipeEnabled: false
}
);
Adding a header to the DrawerNavigator resulted in the following (red). I'm trying to set the white background at the top to red.