JSX attributes must only be assigned a non-empty expression

JSX attributes must only be assigned a non-empty expression - javascript

I am trying to create a custom drawer in react-navigation. However I am getting an error. The error is JSX attributes must only be assigned a non-empty expression. I have even create the array and maped it to show but still getting an error. Did i miss anything?
import { StackNavigator, DrawerNavigator } from 'react-navigation';
import { View, Text, Image, TouchableOpacity } from 'react-native';
import Icon from 'react-native-vector-icons/Ionicons';
const navitems =[
{
name:'Home',
nav:'classesnew',
},
{
name:'Device',
nav:'start',
},
]
class DrawerContent extends React.Component{
constructor(props) {
super(props)
}
render(){
return (
<Image source={require('../images/logo.png')}
style={styles.container}>
<View style={{justifyContent: 'center',
alignItems: 'center',}}>
<Image style={styles.image} source={{uri: ''}}/>
</View>
<View>
{
navitems.map((l,i)=>{
return (
<TouchableOpacity
key={i}
style={{marginBottom:0.5}}
onPress={()=>{
this.props.navigation.navigate(l.nav)
}
}>
<View style={{flexDirection:'row', padding: 15, paddingLeft:0, backgroundColor:'#fff0', borderTopWidth:0.5, borderColor:'rgba(255,255,255, 0.5)', marginLeft: 20, marginRight:20}}>
<Icon name={l.icon} size={20} style={{paddingLeft:10, paddingRight: 20, height: 25, }} color="#ffffff" />
<Text style={{fontSize:16, fontWeight: 'bold',color:'#fff'}}>{l.name}</Text>
</View>
</TouchableOpacity>)
})
}
</View>
</Image>)
}
}
const DrawerRoutes = (
{
Main: { screen: App, title: 'Main' },
Device: { screen: Device, title: 'Device' },
})
const Drawer = DrawerNavigator(DrawerRoutes ,{
contentComponent:({navigation})=> <DrawerContent navigation={navigation} routes={DrawerRoutes} />,
});
Drawer.navigationOptions = {
contentOptions: {
activeBackgroundColor: '#ff5976',
style: {
backgroundColor: '#000000',
zIndex: 100,
paddingTop: 0
}
},
header: ({ state, setParams, navigate, dispatch }) => ({
visible: true,
tintColor: '#ffffff',
title: "LokaLocal",
style: {
backgroundColor: '#ff5976'
},
right: (
<TouchableOpacity
onPress={() => navigate('DrawerOpen')}
>
<Icon name="search" size={16} style={{ padding: 10, paddingRight: 20 }} color="#ffffff" />
</TouchableOpacity>
),
left: (
<TouchableOpacity
onPress={}
>
<Icon name="bars" size={16} style={{ padding: 10, paddingLeft: 20 }} color="#ffffff" />
</TouchableOpacity>
),
})
}
export const Routes = StackNavigator(
{
Login: { screen: Login },
Dashboard: {screen: Drawer},
},
);
I am using react-navigation 1.0.0.bet.9

<TouchableOpacity
onPress={}
Here , as the error mentioned , you can't assign an empy expression to a JSX attributes.

You can't have empty {} in JSX attributes.
In here you can't have
<TouchableOpacity
onPress={}
>
Fix this by having
<TouchableOpacity
onPress={someFunction}
>

Error:
onPress={}
You have to pass a prop but to run this temporary you can do this as :
onPress={""}
let me know if it worked :)

Related

How to navigate to a screen in parent navigation in React native

I am very new to React Navigation and am trying to implement the following functionality in react-native:
I have a stack navigator as a parent and a bottom navigation bar as its child. From the home screen, when the user clicks the logout option, they should return to the Sign In screen which is a part of the parent navigation.
There are already a lot of questions regarding this, but I am not able to implement the previous solutions in my code.
Someone please help me out, the code is given below (This is an Expo managed project):
Navigation Components
import { NavigationContainer } from "#react-navigation/native";
import { createNativeStackNavigator } from "#react-navigation/native-stack";
import WelcomeScreen from "../screens/WelcomeScreen";
import Features from "../screens/Features";
import SignIn from "../screens/SignIn";
import Register from "../screens/Register";
import { createBottomTabNavigator } from "#react-navigation/bottom-tabs";
import { Icon } from "react-native-elements";
import Home from "../screens/Home";
import Reminders from "../screens/Reminders";
import Settings from "../screens/Settings";
const BottomNavbar = () => {
const Tab = createBottomTabNavigator();
return (
<Tab.Navigator
initialRouteName="Home"
screenOptions={({ route }) => ({
tabBarIcon: ({ focused }) => {
let iconName;
let rn = route.name;
if (rn === "Home") {
iconName = focused ? "home" : "home-outline";
} else if (rn === "Reminders") {
iconName = focused ? "list" : "list-outline";
} else if (rn === "Settings") {
iconName = focused ? "settings" : "settings-outline";
}
return (
<Icon
name={iconName}
size={25}
color="black"
type="ionicon"
/>
);
},
})}
showLabel
>
<Tab.Screen
name="Home"
component={Home}
options={{ headerShown: false }}
/>
<Tab.Screen
name="Reminders"
component={Reminders}
options={{ headerShown: false }}
/>
<Tab.Screen
name="Settings"
component={Settings}
options={{ headerShown: false }}
/>
</Tab.Navigator>
);
};
const Navigator = () => {
const Stack = createNativeStackNavigator();
return (
<NavigationContainer>
<Stack.Navigator
screenOptions={{ headerShown: false }}
initialRouteName="Welcome"
>
<Stack.Screen name="Welcome" component={WelcomeScreen} />
<Stack.Screen name="Features" component={Features} />
<Stack.Screen name="SignIn" component={SignIn} />
<Stack.Screen name="Register" component={Register} />
<Stack.Screen name="BottomNavbar" component={BottomNavbar} />
</Stack.Navigator>
</NavigationContainer>
);
};
export default Navigator;
Home Screen Components
import {
View,
Text,
SafeAreaView,
StyleSheet,
TouchableOpacity,
ScrollView,
} from "react-native";
import React from "react";
import { Header, Image, Icon } from "react-native-elements";
import { useFonts } from "expo-font";
import ServiceCard from "../components/ServiceCard";
import PetCard from "../components/PetCard";
const SignOut = ({ navigation }) => {
return (
<TouchableOpacity
onPress={() => {
navigation.navigate("SignIn");
}}
>
<Icon name="logout" color="black" size={20} />
</TouchableOpacity>
);
};
const Home = () => {
const [loaded, error] = useFonts({
Montserrat: require("../assets/fonts/Montserrat-Regular.ttf"),
});
if (!loaded) {
return null;
}
const url1 =
"https://images.unsplash.com/photo-1530281700549-e82e7bf110d6?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=388&q=80";
const url2 =
"https://images.unsplash.com/photo-1560807707-8cc77767d783?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=435&q=80";
const url3 =
"https://images.unsplash.com/photo-1543466835-00a7907e9de1?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=774&q=80";
return (
<View style={styles.screen}>
<Header
leftComponent={{
icon: "menu",
color: "black",
}}
rightComponent={<SignOut />}
centerComponent={{
text: "PetPapa",
color: "black",
style: {
fontFamily: "Montserrat",
fontSize: 20,
},
}}
barStyle="dark-content"
backgroundColor="white"
containerStyle={styles.header}
/>
<View style={styles.community}>
<View style={styles.commOffer}>
<View>
<Text style={styles.commOfferTitle}>Join our</Text>
<Text style={styles.commOfferTitle}>
community today!
</Text>
</View>
<TouchableOpacity style={styles.btn}>
<Text style={styles.commOfferJoin}>Join Now</Text>
</TouchableOpacity>
</View>
<Image
source={{
uri: "https://imgur.com/nB4Xm1Z.png",
}}
style={styles.commDog}
/>
</View>
<View style={styles.listView}>
<View style={styles.topText}>
<Text style={styles.title}>Services</Text>
<TouchableOpacity>
<Text style={styles.option}>See more</Text>
</TouchableOpacity>
</View>
<ServiceCard />
</View>
<View style={styles.listView}>
<View style={styles.topText}>
<Text style={styles.title}>My Pets</Text>
<TouchableOpacity>
<Text style={styles.option}>See all</Text>
</TouchableOpacity>
</View>
<ScrollView
style={styles.petView}
horizontal={true}
showsHorizontalScrollIndicator={true}
persistentScrollbar={true}
>
<PetCard name="Miles" Img={url1} />
<PetCard name="Jack" Img={url2} />
<PetCard name="Ellie" Img={url3} />
</ScrollView>
</View>
</View>
);
};
const styles = StyleSheet.create({
screen: {
height: "100%",
backgroundColor: "white",
alignItems: "center",
},
header: {
backgroundColor: "white",
height: 80,
},
community: {
backgroundColor: "#1976D2",
height: "15%",
width: "80%",
borderRadius: 20,
marginTop: 50,
flexDirection: "row",
justifyContent: "space-around",
},
commDog: {
marginTop: 10,
marginRight: 15,
height: 105,
width: 75,
},
commOffer: {
marginTop: 10,
flexDirection: "column",
justifyContent: "space-around",
},
commOfferTitle: {
color: "white",
fontFamily: "Montserrat",
fontSize: 16,
},
btn: {
backgroundColor: "#FFC107",
width: "50%",
borderRadius: 10,
},
commOfferJoin: {
color: "white",
margin: 5,
},
listView: {
marginTop: 50,
width: "80%",
},
topText: {
flexDirection: "row",
justifyContent: "space-between",
alignItems: "center",
},
title: {
fontFamily: "Montserrat",
fontWeight: "600",
},
option: {
fontFamily: "Montserrat",
opacity: 0.4,
},
block: {
backgroundColor: "#FF5677",
width: 75,
height: 100,
justifyContent: "center",
alignItems: "center",
marginTop: 25,
borderRadius: 20,
},
petView: {
width: "100%",
backgroundColor: "white",
height: 250,
},
});
export default Home;
My Directory Structure:

First you need to add navigation prop to Home screen component
const Home = ({navigation}) => {
const [loaded, error] = useFonts({
Montserrat: require("../assets/fonts/Montserrat-Regular.ttf"),
});
...
then You need to pass navigation prop to the signout component
<Header
leftComponent={{
icon: "menu",
color: "black",
}}
rightComponent={<SignOut navigation={navigation} />}
...
You can also use useNavigation hook from react navigation
import { useNavigation } from '#react-navigation/native';
const SignOut = ({}) => {
const navigation = useNavigation()
return (
<TouchableOpacity
onPress={() => {
navigation.navigate("SignIn");
}}
>
<Icon name="logout" color="black" size={20} />
</TouchableOpacity>
);
};
If You want to create login flow then you should use Authentication flow which I think best prectice and recommended way
The problem in current flow if you logout and navigate to sign-in page once then if you navigate back from you app then as behaviour of stack navigation it just pop current screen and it will again navigate to home screen which is not what supposed to be correct.
You can learn it from react-navigation offical doc
https://reactnavigation.org/docs/auth-flow/
if you want a video tutorial how to implement Authentication flow using redux(state management lib) then I have video tutorial you can learn this video -> https://youtu.be/cm1oJ7JmW6c

How to Pass Props to Modal Component in React Native

I need to pass Flatlist data to modal in react native. Like, on click the item from the flatlist, it shows the modal with data for selected item. Here is my code below
Home.js
import React, { Component } from 'react';
import { StyleSheet, Text, View, FlatList, Image, TouchableOpacity, Alert, Button } from 'react-native';
import { Popup } from './Modal';
import * as productdata from '../data/productdata.js';
export default class Home extends Component {
constructor(props) {
super(props);
this.state = {
isLoading: true,
dataSource: [],
};
}
componentDidMount() {
this.setState({
isLoading: false,
dataSource: productdata.product,
})
}
popupRef = React.createRef()
onShowPopup = item => {
popupRef.show();
}
onClosePopup = () => {
popupRef.close()
}
ProductList = ({ item }) => (
<View style={styles.listItem}>
<TouchableOpacity onPress={() => this.onShowPopup(item)} style={{ height: 100, width: 100, justifyContent: "center", alignItems: "center" }}>
<Image source={item.photo} style={{ width: 100, height: 100, borderRadius: 15 }} />
</TouchableOpacity>
<View style={{ alignItems: "center", flex: 1, marginTop: 20 }}>
<Text style={{ fontWeight: "bold", fontSize: 22 }}>{item.name}</Text>
<Text style={{ fontSize: 18, fontWeight: "bold" }}>{item.price}</Text>
</View>
<Popup name="Product Details" ref={(target) => popupRef = target} onTouchOutside={this.onClosePopup} />
</View>
);
render() {
return (
<View style={styles.container}>
<FlatList
data={this.state.dataSource}
renderItem={this.ProductList}
keyExtractor={item => item.name}
/>
</View>
);
}
}
Modal.js
import React, { Component } from 'react';
import { Modal, Dimensions, TouchableWithoutFeedback, StyleSheet, View, Text, Button, Image, TouchableOpacity } from 'react-native';
const deviceHeight = Dimensions.get("window").height
export class Popup extends Component {
constructor(props) {
super(props)
this.state = {
show: false,
}
}
show = () => {
this.setState({ show: true })
}
close = () => {
this.setState({ show: false })
}
renderOutsideTouchable(onTouch) {
const view = <View style={{ flex: 1, width: '100%' }} />
if (!onTouch) return view
return (
<TouchableWithoutFeedback onPress={onTouch} style={{ flex: 1, width: '100%' }}>
{view}
</TouchableWithoutFeedback>
)
}
renderTitle = () => {
const { name } = this.props
return (
<View style={{ alignItems: 'center' }}>
<Text style={{
color: 'black', fontSize: 20,
fontWeight: 'bold', margin: 15
}}>
{name}
</Text>
</View>
)
}
renderContent = (item) => {
return (
<View style={{ alignItems: 'center', marginBottom: 10 }}>
<View style={styles.card}>
<Text style={{ fontSize: 20, fontWeight: '500', fontWeight: 'bold', alignSelf: 'center', margin: 5 }}/>
<TouchableOpacity style={styles.buttonContainer}>
<Text style={styles.button}>Add to Cart</Text>
</TouchableOpacity>
</View>
</View>
)
}
render() {
let { show } = this.state
const { onTouchOutside, title } = this.props
return (
<Modal animationType={'slide'} transparent={true} visible={show} onRequestClose={this.close}>
<View style={{ flex: 1, backgroundColor: '#000000AA', justifyContent: 'flex-end' }}>
{this.renderOutsideTouchable(onTouchOutside)}
<View style={{
backgroundColor: '#FFFFFF', width: '100%', height: '70%', borderTopRightRadius:20, borderTopLeftRadius: 20, paddingHorizontal: 20, maxHeight: deviceHeight * 5}}>
{this.renderTitle()}
{this.renderContent()}
</View>
</View>
</Modal>
)
}
}
My Problem: I am not able to pass the flatlist item data to a Modal component and have no better idea solving it in this code.
Please help me and if any including, changes or complete solution for perfect understanding for the requirement would be really great. Many Thanks in Advance!

You don't need to duplicate open state in modal/popup. Simply set the style and open. Assume open close state is controlled by parent component, so if rendering modal/popup it is open by definition.
class Popup extends React.Component {
renderOutsideTouchable(onTouch) {
const view = <View style={{ flex: 1, width: '100%' }} />;
if (!onTouch) return view;
return (
<TouchableWithoutFeedback
onPress={onTouch}
style={{ flex: 1, width: '100%' }}>
{view}
</TouchableWithoutFeedback>
);
}
renderTitle = () => {
const { name } = this.props;
return (
<View style={{ alignItems: 'center' }}>
<Text
style={{
color: 'black',
fontSize: 20,
fontWeight: 'bold',
margin: 15,
}}>
{name}
</Text>
</View>
);
};
renderContent = () => {
const { item } = this.props;
return (
<View style={{ alignItems: 'center', marginBottom: 10 }}>
<View style={styles.card}>
<Text
style={{
fontSize: 20,
fontWeight: '500',
// fontWeight: "bold",
alignSelf: 'center',
margin: 5,
}}
/>
<TouchableOpacity style={styles.buttonContainer}>
<Text>Name: {item.name}</Text>
<Text>Price: {item.price}</Text>
<Text>Description: {item.desc}</Text>
<Text>Rating: {item.rating}</Text>
<Text style={styles.button}>Add to Cart</Text>
</TouchableOpacity>
</View>
</View>
);
};
render() {
const { onTouchOutside, title } = this.props;
return (
<Modal
animationType={'slide'}
transparent
visible // <-- visible prop is truthy
onRequestClose={this.close}>
<View
style={{
flex: 1,
backgroundColor: '#000000AA',
justifyContent: 'flex-end',
zIndex: 1000,
}}>
{this.renderOutsideTouchable(onTouchOutside)}
<View
style={{
backgroundColor: '#FFFFFF',
width: '100%',
height: '70%',
borderTopRightRadius: 20,
borderTopLeftRadius: 20,
paddingHorizontal: 20,
maxHeight: deviceHeight * 5,
}}>
{this.renderTitle()}
{this.renderContent()}
</View>
</View>
</Modal>
);
}
}
A react ref isn't necessary for opening a modal/popup to display a specific item. Change the onShowPopup and onClosePopup to set/nullify a clicked on item. Conditionally render the Popup outside the Flatlist.
class Home extends React.Component {
constructor(props) {
super(props);
this.state = {
dataSource: productdata.product,
isLoading: false,
popupItem: null,
};
}
onShowPopup = (popupItem) => {
this.setState({ popupItem });
};
onClosePopup = () => {
this.setState({ popupItem: null });
};
ProductList = ({ item }) => (
<View style={styles.listItem}>
<TouchableOpacity
onPress={() => this.onShowPopup(item)}
style={{
height: 100,
width: 100,
justifyContent: 'center',
alignItems: 'center',
}}>
<Image
source={item.photo}
style={{ width: 100, height: 100, borderRadius: 15 }}
/>
</TouchableOpacity>
<View style={{ alignItems: 'center', flex: 1, marginTop: 20 }}>
<Text style={{ fontWeight: 'bold', fontSize: 22 }}>{item.name}</Text>
<Text style={{ fontSize: 18, fontWeight: 'bold' }}>{item.price}</Text>
</View>
</View>
);
render() {
return (
<View style={styles.container}>
{this.state.popupItem && (
<Popup
name="Product Details"
item={this.state.popupItem} // <-- pass pop item
onTouchOutside={this.onClosePopup}
/>
)}
<FlatList
data={this.state.dataSource}
renderItem={this.ProductList}
keyExtractor={(item) => item.name}
/>
</View>
);
}
}
Expo Snack

How to render a partial view on another view in react native

When I tried alert("Hi") in renderMoreView function, it actually works, but to display the View is the problem I am facing
export default class Home extends Component {
state = {
moreButton: false,
};
renderMoreView = () => {
return (
<View style={{flex: 1, height: 50, width: 50}}>
<Text>Hi</Text>
</View>
);
};
render () {
return (
<View>
.....
<TouchableOpacity
underlayColor="transparent"
onPress={() => this.setState ({moreButton: true})}
>
<Feather name="more-vertical" size={25} />
</TouchableOpacity>
...
{this.state.moreButton ? this.renderMoreView () : null}
</View>
);
}
}
This is what I am trying to do]

If I understand your question right, you could use Modal component. https://facebook.github.io/react-native/docs/modal

This can be done using modal. But if you want to do it more simply, install and use the module. react-native-awesome-alerts
$ npm i react-native-awesome-alerts --save
Example
import React from 'react';
import { StyleSheet, View, Text, TouchableOpacity } from 'react-native';
import AwesomeAlert from 'react-native-awesome-alerts';
export default class App extends React.Component {
constructor(props) {
super(props);
this.state = { showAlert: false };
};
showAlert = () => {
this.setState({
showAlert: true
});
};
hideAlert = () => {
this.setState({
showAlert: false
});
};
render() {
const {showAlert} = this.state;
return (
<View style={styles.container}>
<Text>I'm AwesomeAlert</Text>
<TouchableOpacity onPress={() => {
this.showAlert();
}}>
<View style={styles.button}>
<Text style={styles.text}>Try me!</Text>
</View>
</TouchableOpacity>
<AwesomeAlert
show={showAlert}
showProgress={false}
title="AwesomeAlert"
message="I have a message for you!"
closeOnTouchOutside={true}
closeOnHardwareBackPress={false}
showCancelButton={true}
showConfirmButton={true}
cancelText="No, cancel"
confirmText="Yes, delete it"
confirmButtonColor="#DD6B55"
onCancelPressed={() => {
this.hideAlert();
}}
onConfirmPressed={() => {
this.hideAlert();
}}
/>
</View>
);
};
};
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: 'center',
justifyContent: 'center',
backgroundColor: '#fff',
},
button: {
margin: 10,
paddingHorizontal: 10,
paddingVertical: 7,
borderRadius: 5,
backgroundColor: "#AEDEF4",
},
text: {
color: '#fff',
fontSize: 15
}
});

How do I map over two arrays at the same time in react native?

How do I map over two different arrays in react native? In my case I'm fetching a response from server and mapping over it. Also there is another array named images which I want to list along with the fetched response from server.But the second mapping is looping within the first one. How do I separate it from the first?Following is my code.
sample code
<ScrollView>
{this.state.workers.map(a =>
<CardSection>
<TouchableOpacity onPress={() => this.popupDialog.show()}>
<View style={{ marginTop: 10, marginLeft:120}}>
{images.map(b =>
<Image
style={{ height: 100, width: 100 }}
source={{ uri: b.image }}
/>
)}
<Text style={{marginLeft:20, fontSize:20}}>{a.work_type}</Text>
</View>
</TouchableOpacity>
</CardSection>
)}
workers array is the json response I'm fetching from server.images array is as folows
export const images = [
{
image:'http://localhost:3000/Images/carpenter.png',
text:'hello'
},
{
image:'http://localhost:3000/Images/electrician.png',
text:'hii'
},
]
Also this how workers array looks like
updated
[
{
"sl.no": 1,
"worker_id": "wr_1",
"work_type": "carpenter",
"phone_num": "3456789243"
},
{
"sl.no": 2,
"worker_id": "wr_2",
"work_type": "electrician",
"phone_num": "345221344"
},
{
"sl.no": 3,
"worker_id": "wr_3",
"work_type": "plumber",
"phone_num": "8976545677"
}
]

You can simply move it above the first map and save the result:
render() {
const imagesToRender = images.map(b => {
return (
<Image
style={{ height: 100, width: 100 }}
source={{ uri: b.image }}
/>
);
});
return (
<ScrollView>
{this.state.workers.map(a =>
<CardSection>
<TouchableOpacity onPress={() => this.popupDialog.show()}>
<View style={{ marginTop: 10, marginLeft:120}}>
{imagesToRender}
<Text style={{marginLeft:20, fontSize:20}}>{a.work_type}</Text>
</View>
</TouchableOpacity>
</CardSection>
)}
</ScrollView>
);
}
Also, don't forget to add key props to each Image and each CardSection.

you can easily use flatlist with better performance
import React, { Component } from "react";
import { View, FlatList, TouchableOpacity, Image, Text } from "react-native";
const workers = [
{ id: 1, name: 'Nima', images: [{ image: 'https://www.lens-rumors.com/wp-content/uploads/2014/10/Nikon-AF-S-DX-Nikkor-18-140mm-f3.5-5.6G-ED-VR-sample-images1.jpg', text: 'hello' },{ image: 'https://www.lens-rumors.com/wp-content/uploads/2014/10/Nikon-AF-S-DX-Nikkor-18-140mm-f3.5-5.6G-ED-VR-sample-images1.jpg', text: 'hello' },{ image: 'https://www.lens-rumors.com/wp-content/uploads/2014/10/Nikon-AF-S-DX-Nikkor-18-140mm-f3.5-5.6G-ED-VR-sample-images1.jpg', text: 'hello' },{ image: 'https://www.lens-rumors.com/wp-content/uploads/2014/10/Nikon-AF-S-DX-Nikkor-18-140mm-f3.5-5.6G-ED-VR-sample-images1.jpg', text: 'hello' }] },
{ id: 2, name: 'Mike', images: [{ image: 'https://www.dike.lib.ia.us/images/sample-1.jpg/image', text: 'goodby' },{ image: 'https://www.dike.lib.ia.us/images/sample-1.jpg/image', text: 'goodby' },{ image: 'https://www.dike.lib.ia.us/images/sample-1.jpg/image', text: 'goodby' },{ image: 'https://www.dike.lib.ia.us/images/sample-1.jpg/image', text: 'goodby' },] },
]
class Test extends Component {
constructor(props) {
super(props);
this.state = {
workers: workers
};
}
_renderItem = ({ item }) => {
console.log(item);
return (
<View style={{ flex: 1 }}>
<TouchableOpacity>
<View style={{ marginTop: 10, marginLeft: 120 }}>
{item.images.map((b, index) => {
console.log(b.image);
return (
<View key={index}>
<Image
style={{ height: 100, width: 100 }}
source={{ uri: b.image }}
/>
<Text
style={{ marginLeft: 20, fontSize: 20, color: "black" }}
>
{b.text}
</Text>
</View>
);
})}
<Text style={{ marginLeft: 20, fontSize: 20, color: "black" }}>
{item.name}
</Text>
</View>
</TouchableOpacity>
</View>
);
};
_keyExtractor = (item, index) => item.id.toString();
render() {
return (
<FlatList
data={this.state.workers}
extraData={this.state}
keyExtractor={this._keyExtractor}
renderItem={this._renderItem}
/>
);
}
}
export default Test;

If the images don't load, it's probably because you pass the wrong properties to the <Image /> component. Look up the docs for <Image /> component or replace it with <img /> instead and pass the url string of the image to the src attribute.
getImageUri(worker) {
// Decide which image to return for a certain type of worker
// For more workers and images, change the following logic
if(worker.work_type == 'carpenter') {
return images[0].image;
} else if(worker.work_type == 'electrician') {
return images[1].image;
} else {
return '';
}
}
render() {
...
<ScrollView>
{this.state.workers.map((a, index) =>
<CardSection>
<TouchableOpacity onPress={() => this.popupDialog.show()}>
<View style={{ marginTop: 10, marginLeft:120}}>
<Image
style={{ height: 100, width: 100 }}
source={{ uri: this.getImageUri(a)}}
/>
<Text style={{marginLeft:20, fontSize:20}}>{a.work_type}</Text>
</View>
</TouchableOpacity>
</CardSection>
)}
</ScrollView>
...
}

pass props to DrawerContent component

I want to pass props to Drawer so that i can display the name of user in the drawer component. If i export DrawerContent, i dont get the props like navigation etc.
routes.js
const navitems =[
{
name:'Home',
nav:'classesnew',
},
{
name:'Device',
nav:'start',
},
]
const mapDispatchToProps = (dispatch) => (
{
loadInitialData: () => dispatch(loadInitialData()),
}
);
const mapStateToProps = createStructuredSelector({
user: selectUser(), // fetch the name of user to show below
});
class DrawerContent extends React.Component{
constructor(props) {
super(props)
}
render(){
return (
<Image source={require('../images/logo.png')}
style={styles.container}>
<View style={{justifyContent: 'center',
alignItems: 'center',}}>
<Image style={styles.image} source={{uri: ''}}/>
<Text>{user.get('name')}</Text> {/* show username */}
</View>
<View>
{
navitems.map((l,i)=>{
return (
<TouchableOpacity
key={i}
style={{marginBottom:0.5}}
onPress={()=>{
this.props.navigation.navigate(l.nav)
}
}>
<View style={{flexDirection:'row', padding: 15, paddingLeft:0, backgroundColor:'#fff0', borderTopWidth:0.5, borderColor:'rgba(255,255,255, 0.5)', marginLeft: 20, marginRight:20}}>
<Icon name={l.icon} size={20} style={{paddingLeft:10, paddingRight: 20, height: 25, }} color="#ffffff" />
<Text style={{fontSize:16, fontWeight: 'bold',color:'#fff'}}>{l.name}</Text>
</View>
</TouchableOpacity>)
})
}
</View>
</Image>)
}
}
const DrawerRoutes = (
{
Main: { screen: App, title: 'Main' },
Device: { screen: Device, title: 'Device' },
})
const Drawer = DrawerNavigator(DrawerRoutes ,{
contentComponent:({navigation})=> <DrawerContent navigation={navigation} routes={DrawerRoutes} />,
});
Drawer.navigationOptions = {
contentOptions: {
activeBackgroundColor: '#ff5976',
style: {
backgroundColor: '#000000',
zIndex: 100,
paddingTop: 0
}
},
header: ({ state, setParams, navigate, dispatch }) => ({
visible: true,
tintColor: '#ffffff',
title: "LokaLocal",
style: {
backgroundColor: '#ff5976'
},
right: (
<TouchableOpacity
onPress={() => navigate('DrawerOpen')}
>
<Icon name="search" size={16} style={{ padding: 10, paddingRight: 20 }} color="#ffffff" />
</TouchableOpacity>
),
left: (
<TouchableOpacity
onPress={}
>
<Icon name="bars" size={16} style={{ padding: 10, paddingLeft: 20 }} color="#ffffff" />
</TouchableOpacity>
),
})
}
export const Routes = StackNavigator(
{
Login: { screen: Login },
Dashboard: {screen: Drawer},
},
index.js
import { Drawer } from './routes';
const App = () => (
<Provider store={store}>
<Drawer />
</Provider>
);
where should i use connect so i can use redux state as props to show username?
UPDATED
const mapDispatchToProps = (dispatch) => (
{
loadInitialData: () => dispatch(loadInitialData()),
}
);
const mapStateToProps = createStructuredSelector({
user: selectUser(),
});
class DrawerContent extends React.Component{
constructor(props) {
super(props)
}
componentDidMount() {
console.log('props are', this.props);
this.props.loadInitialData();
}
render() {
console.log('props', this.props);
return (
<View style={styles.container}>
<View>
<Image style={styles.image} source={require('../images/logo.png')}/>
<Text style={{ color: '#fff', fontSize: 11, paddingTop: 10, paddingBottom: 20 }}>username here</Text>
</View>
<View>
{
navitems.map((l,i)=>{
return (
<TouchableOpacity
key={i}
style={{marginBottom:0.5}}
onPress={()=>{
this.props.navigation.navigate(l.nav)
}
}>
<View style={{flexDirection:'row', padding: 15, paddingLeft:0, borderTopWidth:0.5, borderColor:'rgba(255,255,255, 0.5)',}}>
<Icon name={l.icon} size={20} style={{paddingLeft:10, paddingRight: 20, height: 25, }} color="#ffffff" />
<Text style={{fontSize:16, fontWeight: 'bold',color:'#fff'}}>{l.name}</Text>
</View>
</TouchableOpacity>)
})
}
</View>
</View>
)
}
}
const DrawerRoutes = (
{
Main: { screen: App, title: 'Main' },
Device: { screen: Device, title: 'Device' },
})
export const Drawer = DrawerNavigator(DrawerRoutes ,{
contentComponent:({navigation})=> <ContentDrawer navigation={navigation} routes={DrawerRoutes} />,
});
const ContentDrawer = connect(mapStateToProps, mapDispatchToProps)(DrawerContent);

Develop Reference

JavaScript is the programming language of the Web.

JSX attributes must only be assigned a non-empty expression - javascript

<TouchableOpacity onPress={} Here , as the error mentioned , you can't assign an empy expression to a JSX attributes.

You can't have empty {} in JSX attributes. In here you can't have <TouchableOpacity onPress={} > Fix this by having <TouchableOpacity onPress={someFunction} >

Error: onPress={} You have to pass a prop but to run this temporary you can do this as : onPress={""} let me know if it worked :)

Related

How to navigate to a screen in parent navigation in React native

How to Pass Props to Modal Component in React Native

How to render a partial view on another view in react native

How do I map over two arrays at the same time in react native?

pass props to DrawerContent component

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