My Flatlist does not work for me, Some one please review and give me a solution
const data = [
'hai', 'hloooo'
]
class HotelList extends Component {
render() {
console.log('data==========', data)
return (
<View style = {{flex: 1, height: '100%', width: '100%'}}>
<Text>Hai</Text>
<FlatList
data = {data}
keyExtractor = {(item, index) => index.toString()}
renderItem = {itemData => {
console.log(itemData)
return (
<View style = {{width: '100%', height: 100, flex: 1, alignItems: 'center', justifyContent: 'center', backgroundColor: 'yellow'}}>
<Text>Holaaaaaa</Text>
</View>
)
}}
/>
</View>
)
}
}
export default HotelList
Basically you have missed some basic theory about how to use a flat list in react native. See official documentation here
Solution :
You need to add id to your array in order to make keyExtractor work
const data = [
{
id: "1",
title: "First Item",
},
{
id: "2",
title: "Second Item",
},
{
id: "3",
title: "Third Item",
},
];
class HotelList extends Component {
render() {
console.log("data==========", data);
return (
<View style={{ flex: 1, height: "100%", width: "100%" }}>
<Text>Hai</Text>
<FlatList
data={data}
keyExtractor={(item) => item.id}
renderItem={(item) => {
console.log(item);
return (
<View
style={{
width: "100%",
height: 100,
flex: 1,
alignItems: "center",
justifyContent: "center",
backgroundColor: "yellow",
}}
>
<Text>{item.title}</Text>
</View>
);
}}
/>
</View>
);
}
}
export default HotelList;
Related
I'm doing a project in react native and my ImageBackgroud component does not want to render. The odd thing is I am already using ImageBackground in another component and it works there. I tried resizing the image but that didn't help.
Here is my component that renders child component with ImageBackground:
const DuringStay = () => {
return (
<View style={styles.container}>
<FlatList
data={test}
numColumns={2}
columnWrapperStyle={{
justifyContent: 'space-between',
marginBottom: 15,
}}
keyExtractor={item => item.id}
renderItem={({ item }) => (
<DuringStayTile item={item} />
)}
/>
</View>
);
};
const styles = StyleSheet.create({
container: {
paddingHorizontal: 20,
flex: 1,
},
});
export default DuringStay;
Here is my component that doesn't want to render ImageBackground. My data comes correctly to the component and inside Pressable i can render other components but ImageBackground won't show up
const DuringStayTile = ({item}) => {
const { title, uri } = item;
console.log(title,uri)
return (
<Pressable style={styles.container}>
<ImageBackground source={uri} resizeMode="cover" style={styles.image}>
<LinearGradient
style={styles.textBox}
colors={['transparent','rgba(0,0,0,0.6)']}>
<Text>
{title}
</Text>
</LinearGradient>
</ImageBackground>
</Pressable>
);
};
export default DuringStayTile;
const styles = StyleSheet.create({
container: {
width: '48%',
padding: 20,
borderRadius: 10,
padding:60,
backgroundColor:'pink'
},
title: {
fontWeight: 'bold',
fontSize: 16,
},
image: {
flex: 1,
overflow:'hidden',
justifyContent:'center'
},
textBox:{
position:'absolute',
right:0,
bottom:0,
width:'100%'
},
});
Data that is imported:
export const test = [
{
uri:require('../assets/f1.jpg'),
title: 'Zip Line',
id: 'bd7acbea-c1b1-46c2-aed5-3ad53abb28ba'
},
{
uri: require('../assets/during.jpeg'),
title: 'Blue Cave',
id: '3ac68afc-c605-48d3-a4f8-fbd91aa97f63',
},
{
uri: require('../assets/post.jpg'),
title: 'Rafting',
id: '58694a0f-3da1-471f-bd96-145571e29d72',
}
]
image: {
flex: 1,
overflow:'hidden',
justifyContent:'center',
padding:30
},
import React, { Component } from "react";
import { StyleSheet, FlatList, View, Image, Text } from "react-native";
const n1 = require("../img/n1.png");
const n2 = require("../img/n2.png");
const n3 = require("../img/n3.png");
const n4 = require("../img/n4.png");
const n5 = require("../img/n5.png");
const n0 = require("../img/n0.png");
class Example extends Component {
constructor(props) {
super(props);
this.state = {
data: [
{ id: 1, image: n1, title: " n1 " },
{ id: 2, image: n2, title: " n2 " },
{ id: 3, image: n3, title: " n3" },
{ id: 4, image: n4, title: " n4 " },
{ id: 5, image: n5, title: " n5" },
],
};
}
render() {
return (
<FlatList
style={styles.container}
data={this.state.data}
keyExtractor={(item) => {
return item.id;
}}
renderItem={({ item }) => {
return (
<View style={styles.box}>
<View style={styles.info}>
<Text style={styles.name}>{item.title} </Text>
<Image style={styles.image} source={{ uri: item.image }} />
</View>
</View>
);
}}
/>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
paddingTop: 30,
},
info: {
flex: 1,
flexDirection: "column",
alignItems: "center",
justifyContent: "center",
},
image: {
width: 173,
height: 88,
},
title: {
color: "#707070",
opacity: 1,
},
box: {
marginLeft: -120,
marginTop: 10,
backgroundColor: "white",
flexDirection: "row",
marginBottom: 20,
},
});
This is part of the code that I have deleted some code not relevant to this question.
My question is how do I change all images(n1-n5) by one click to n0.
The page will show 5 different images(n1-n5) in a list, then after clicking a button, all images will be replaced by n0.
I got some idea about setState, but I am new to React and don't know how to make it work(or not state) even after search.
BTW, its a webpage, but I use react-native-web to get the images more pretty arranged.
This is a simple map operation.
handleClick = () =>
this.setState((prev) => ({
data: prev.data.map((item) => ({
...item,
image: n0,
title: "n0",
})),
}));
Start by adding extraData to the flat list to re render when button clicked
<FlatList
style={styles.container}
data={this.state.data}
extraData={this.state}
keyExtractor={(item) => {
return item.id;
}}
renderItem={({ item }) => {
return (
<View style={styles.box}>
<View style={styles.info}>
<Text style={styles.name}>{item.title} </Text>
<Image style={styles.image} source={{ uri: item.image }} />
</View>
</View>
);
}}
/>
....
//add function for button click:
onButtonClicked(){
//create the new data array
//replace it with the old array state
this.setState({data: new_data}); //flat list should re render when state changed
}
I am struggling for last couple of months to achieve a requirement where I'm having a draggable flatlist and a flatlist in a single scrollview and I should able to scroll the whole content.
The draggable flatlist should have autoscroll as well, that means when the list is too long and I'm trying to drag it out of the viewport, the list should scroll automatically unless I drop it.
I know the requirement is pretty much tricky but I am not getting any clue to make it work completely.
I am using the below code and I am using 'react-native-draggable-flatlist'(https://github.com/computerjazz/react-native-draggable-flatlist) for this purpose.
Code:
import React from 'react';
import {
SafeAreaView,
StyleSheet,
ScrollView,
View,
Text,
StatusBar,
TouchableOpacity
} from 'react-native';
import {
Header,
LearnMoreLinks,
Colors,
DebugInstructions,
ReloadInstructions,
} from 'react-native/Libraries/NewAppScreen';
import DraggableFlatList from 'react-native-draggable-flatlist'
import { Component } from 'react'
const exampleData = [...Array(20)].map((d, index) => ({
key: `item-${index}`, // For example only -- don't use index as your key!
label: index,
backgroundColor: `rgb(${Math.floor(Math.random() * 255)}, ${index *
5}, ${132})`
}));
class App extends Component {
state = {
data: exampleData,
scrollEnabled: true
};
onEnableScroll = (value: boolean) => {
this.setState({
enableScrollViewScroll: value,
});
};
renderItem = ({ item, index, drag, isActive }) => {
return (
<TouchableOpacity
style={{
height: 100,
backgroundColor: isActive ? "blue" : item.backgroundColor,
alignItems: "center",
justifyContent: "center"
}}
onLongPress={drag}
>
<Text
style={{
fontWeight: "bold",
color: "white",
fontSize: 32
}}
>
{item.label}
</Text>
</TouchableOpacity>
);
};
render() {
return (
<ScrollView
style={{ backgroundColor: '#000', flex: 1 }}
contentContainerStyle={{ paddingTop: 800, paddingBottom: 100 }}
scrollEnabled={this.state.scrollEnabled}
>
<DraggableFlatList
data={this.state.data}
renderItem={this.renderItem}
keyExtractor={(item, index) => `draggable-item-${item.key}`}
onMoveBegin={() => this.setState({ scrollEnabled: false })}
onMoveEnd={({ data }) => {
this.setState({ scrollEnabled: true, data });
}}
/>
<FlatList
data={this.state.data}
renderItem={this.renderItem}
keyExtractor={(item, index) => `draggable-item-${item.key}`}
/>
</ScrollView>
);
}
}
const styles = StyleSheet.create({
scrollView: {
backgroundColor: Colors.lighter,
},
engine: {
position: 'absolute',
right: 0,
},
body: {
backgroundColor: Colors.white,
},
sectionContainer: {
marginTop: 32,
paddingHorizontal: 24,
},
sectionTitle: {
fontSize: 24,
fontWeight: '600',
color: Colors.black,
},
sectionDescription: {
marginTop: 8,
fontSize: 18,
fontWeight: '400',
color: Colors.dark,
},
highlight: {
fontWeight: '700',
},
footer: {
color: Colors.dark,
fontSize: 12,
fontWeight: '600',
padding: 4,
paddingRight: 12,
textAlign: 'right',
},
});
export default App;
You should use ListFooterComponent and ListHeaderComponent method to render items.
Please change your render method like below code.
render() {
return (
<View
style={{ backgroundColor: '#000', flex: 1 }}
>
<DraggableFlatList
data={this.state.data}
renderItem={this.renderItem}
keyExtractor={(item, index) => `draggable-item-${item.key}`}
onMoveBegin={() => this.setState({ scrollEnabled: false })}
onMoveEnd={({ data }) => {
this.setState({ scrollEnabled: true, data });
}}
ListFooterComponent={() => {
return <View>
<FlatList
data={this.state.data}
renderItem={this.renderItem}
keyExtractor={(item, index) => `draggable-item-${item.key}`}
/>
</View>
}}
/>
</View>
);
}
In my case, I have another ScrollView composition.
My solution was found in this repository:
React Native Draggable FlatList
I replaced:
ScrollView -> NestableScrollContainer
DraggableFlatList -> NestableDraggableFlatList
Initially there was one DraggableFlatList but in this case I was able to scroll via the DraggableFlatList
Not sure where I go about declaring the array with which I want to search from, any assistance would be appreciated. I believe my issue is that I am declaring the "services' array in the incorrect area but I am not sure where else to put it! Or if the commas are the right character to be using in between strings/services
import React, { useState, Component } from 'react';
import { StyleSheet, StatusBar, View, Text, Button, TouchableOpacity } from 'react-native';
import AutoComplete from 'react-native-autocomplete-input';
class CareProviderSequenceScreen extends Component {
constructor (props) {
super (props);
this.state = {
services: [],
query: '',
}
}
render() {
const query = this.state;
const services = {
"Pick up my Prescription",
'Pick up groceries',
'Pick up dry cleaning',
'Pick up my pet',
}
return (
<View style={styles.container}>
<Autocomplete
autoCapitalize="none"
autoCorrect={false}
containerStyle={styles.autocompleteContainer}
//data to show in suggestion
data={services.length === 1 && comp(query, services[0].title) ? [] : services}
//default value if you want to set something in input
defaultValue={query}
/*onchange of the text changing the state of the query which will trigger
the findFilm method to show the suggestions*/
onChangeText={text => this.setState({ query: text })}
placeholder="Enter your need"
renderItem={({ item }) => (
//you can change the view you want to show in suggestion from here
<TouchableOpacity onPress={() => this.setState({ query: item.title })}>
<Text style={styles.itemText}>
{item.title} ({item.release_date})
</Text>
</TouchableOpacity>
)}
/>
<View style={styles.descriptionContainer}>
{services.length > 0 ? (
<Text style={styles.infoText}>{this.state.query}</Text>
) : (
<Text style={styles.infoText}>Enter The Film Title</Text>
)}
</View>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
backgroundColor: '#F5FCFF',
flex: 1,
padding: 16,
marginTop: 40,
},
autocompleteContainer: {
backgroundColor: '#ffffff',
borderWidth: 0,
},
descriptionContainer: {
flex: 1,
justifyContent: 'center',
},
itemText: {
fontSize: 15,
paddingTop: 5,
paddingBottom: 5,
margin: 2,
},
infoText: {
textAlign: 'center',
fontSize: 16,
},
});
export default CareProviderSequenceScreen ;
CareProviderSequenceScreen .navigationOptions = () => ({
title: "Home & Personal Care",
headerTintColor: '#9EBBD7',
headerStyle: {
height: 65,
backgroundColor: '#1E5797',
shadowColor: "#000",
shadowOffset: {
width: 0,
height: 1,
},
shadowOpacity: 0.20,
shadowRadius: 1.41,
elevation: 2,}
});
First, you are assigning an object to services array.
Second, you are not accessing the query state properly. It should be
const { query } = this.state
This is my code for Chat Box, the window where I have "In" and "Out" messages are appearing.
import React, { Component } from "react";
import {
StyleSheet,
Text,
View,
TouchableOpacity,
TextInput,
FlatList,
Platform,
AsyncStorage
} from "react-native";
import Tutor from "../image/krutika.jpg";
import {
Container,
Header,
Left,
Input,
Body,
Right,
Thumbnail,
Button
} from "native-base";
import FontAwesome from "react-native-vector-icons/FontAwesome";
import Ionicons from "react-native-vector-icons/Ionicons";
import Icon1 from "react-native-vector-icons/FontAwesome";
import axios from "axios";
export default class ChatBox extends Component {
static navigationOptions = {
header: null
};
state = {
group_msgs: [],
student_id: null
};
renderDate = date => {
return <Text style={styles.time}>{date}</Text>;
};
componentWillMount = () => {
this.loading();
const { navigation } = this.props;
groupName = navigation.getParam("groupName");
group_id = navigation.getParam("group_id");
};
loading = async () => {
const userid = await AsyncStorage.getItem("user_id");
this.state.student_id = userid;
try {
let { data } = await axios.get('https://www.qualpros.com/chat/imApi/getMessage?groupId=6&limit=10&start=0&userId=62').then(response => {
// console.log(response)
if (response.status == 200) {
this.setState({ group_msgs: response.data.response.message });
console.log(response.data.response)
} else {
}
});
} catch (err) {
console.log(err);
}
};
render() {
return (
<Container>
<Header style={{ backgroundColor: "#d91009" }}>
<Left style={{ flex: 1, flexDirection: "row" }}>
<TouchableOpacity
style={styles.backArrow}
onPress={() => this.props.navigation.navigate("ChatScreen")}
>
<FontAwesome name="angle-left" size={30} color="#fff" />
</TouchableOpacity>
<Thumbnail
source={Tutor}
style={{
marginLeft: 8,
width: 30,
height: 30,
borderRadius: 30 / 2
}}
/>
</Left>
<Body>
<Text
onPress={() => {
this.props.navigation.navigate("Groupmembers", {
group_id:group_id,
groupname:groupName,
});
}}
style={{
alignSelf: Platform.OS == "android" ? "center" : null,
fontSize: 17,
color: "#fff"
}}
>
{groupName}
</Text>
</Body>
<Right>
<Button
style={{ backgroundColor: "#d91009" }}
onPress={() => {
this.props.navigation.navigate("TutorCalender");
}}
>
<Icon1 active name="calendar" size={24} color="#FFF" />
</Button>
</Right>
</Header>
<View style={styles.container}>
<FlatList
style={styles.list}
data={this.state.group_msgs}
keyExtractor={item => {
return item.m_id;
}}
renderItem={message => {
console.log(item);
const item = message.item;
let inMessage = (item.sender === this.state.userid) ? 'in' : 'out';
let itemStyle = inMessage ? styles.itemIn : styles.itemOut;
return (
<View style={[styles.item, itemStyle]}>
<View style={[styles.balloon]}>
<Text>{item.message}</Text>
</View>
</View>
);
}}
/>
<View style={styles.footer}>
<View style={styles.inputContainer}>
<TextInput
style={styles.inputs}
placeholder="Write a message..."
underlineColorAndroid="transparent"
onChangeText={name_address => this.setState({ name_address })}
/>
</View>
{/* <TouchableOpacity style={styles.btnSend}>
<Ionicons name="md-send" size={36} color='#d91009' /> style={styles.iconSend} />
</TouchableOpacity> */}
</View>
</View>
</Container>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1
},
list: {
paddingHorizontal: 17
},
footer: {
flexDirection: "row",
height: 60,
backgroundColor: "#eeeeee",
paddingHorizontal: 10,
padding: 5
},
btnSend: {
//color: "#d91009",
width: 40,
height: 40,
borderRadius: 360,
alignItems: "center",
justifyContent: "center"
},
iconSend: {
width: 30,
height: 30,
alignSelf: "center"
},
inputContainer: {
borderBottomColor: "#F5FCFF",
backgroundColor: "#FFFFFF",
borderRadius: 30,
borderBottomWidth: 1,
height: 40,
flexDirection: "row",
alignItems: "center",
flex: 1,
marginRight: 10
},
inputs: {
height: 40,
marginLeft: 16,
borderBottomColor: "#FFFFFF",
flex: 1
},
balloon: {
maxWidth: 250,
padding: 15,
borderRadius: 20
},
itemIn: {
alignSelf: "flex-start",
backgroundColor: "#eeeeee"
},
itemOut: {
alignSelf: "flex-end",
backgroundColor: "#DCF8C5"
},
time: {
alignSelf: "flex-end",
margin: 15,
fontSize: 12,
color: "#808080"
},
item: {
marginVertical: 14,
flex: 1,
flexDirection: "row",
borderRadius: 300,
padding: 1
}
});
I am using axios to fetch the api, the api response is coming as an Array inside the array but nothing is coming on the screen.
I can get it with storing response upto message but then I can't have the loop on messages.
Please help.
Thanks in advance
When doing a GET request to the endpoint in your code the response looks as follows:
{
"status":{
"code":200,
"message":"Success"
},
"totalMessage":6,
"recentMessageId":228,
"response":[
...
]
}
Inside the response object there's an array of message objects so you can't use response.data.response.message when setting state. That part of your code needs to be:
this.setState({ group_msgs: response.data.response });
Now you should be able to iterate through the group_msgs object to get the message key value for each item in the array.
Also in the FlatList component you should have
keyExtractor={item => {
return item.message.m_id;
}}
Your renderItem seems to be wrong as well, see should be something like this:
renderItem={ ({item}) => {
let inMessage = (item.sender.usedId === this.state.userid) ? 'in' : 'out';
let itemStyle = inMessage ? styles.itemIn : styles.itemOut;
return (
<View style={[styles.item, itemStyle]}>
<View style={[styles.balloon]}>
<Text>{item.message.message}</Text>
</View>
</View>
);
}}
I strongly suggest you take a look at the structure of the response object since that's where you are failing at the moment.