I'm working on a messaging app with the following code:
const MessageCentral = () => {
const [inputText, onChangeText] = useState('');
const [bodyText, updateText] = useState("");
const addMessage = () => {
updateText(bodyText + inputText + "\n" );
}
const pressSend = () => {
addMessage();
}
return (
<SafeAreaView style= {StyleSheet.safeContainer}>
<View style={styles.container}>
<ScrollView
ref={scrollView =>this.scrollView = scrollView}
onContentSizeChange={scrollView.scrollToEnd({animated: true})}
style={styles.messageContainer}>
<Text>
{bodyText.toString()}
</Text>
</ScrollView>
<View style={styles.inputContainer}>
<TextInput
style={styles.messageInput}
onChangeText={text => onChangeText(text)}
value={inputText}
/>
<Button
style={styles.sendButton}
icon = { <Icon
name= "activity"
size={25}
color="blue"
/>
}
onPress={() => {
pressSend();
}}
/>
</View>
</View>
</SafeAreaView>
)
}
On the iOS emulator, when I enter some text without autocomplete and press the send button, the bodyText updates as it is supposed to. If I use autocomplete for the last word and press enter, bodyText is updated with the inputText before the autocomplete. How can I fix this?
Related
I want to save the values from all input fields to getdata(), but I am getting undefined value
export default function Signupfor(props) {
// const phoneInput = useRef < PhoneInput > null;
const [text, setTextname] = useState();
function getdata() {
console.log('dsd');
console.log(text);
}
const {userInfo, log} = props?.route?.params;
console.log(log.name);
return (
<View style={styles.prheight}>
<View style={styles.form}>
<Text style={styles.r}>One Last Step</Text>
<TextInput
style={styles.forminput}
label="Name"
value={userInfo.user.name}
onChangeText={text => setTextname(text)}
/>
<TextInput
style={styles.forminput}
label="Email"
value={userInfo.user.email}
onChangeText={text => setTextemail(text)}
/>
<TextInput
style={styles.forminput}
label="Whatsapp Number"
keyboardType="numeric"
value={userInfo.user.number}
onChangeText={text => setTextnumber(text)}
// value={this.state.myNumber}
maxLength={10} //setting limit of input
/>
</View>
<View style={styles.buttonw}>
<Button color="#7743DB" title="Lets Go" onPress={() => getdata()} />
</View>
</View>
);
}
Here, name and email should not be able to be edited. I want to pass the value from value={userInfo.user.name} to the getdata()
you can use formik package for making form in react native
Installation
yarn add formik
Usage
import { Formik } from "formik";
export default function Signupfor(props) {
const { userInfo, log } = props?.route?.params;
console.log(log.name);
return (
<Formik
initialValues={{
name: userInfo.user.name,
email: userInfo.user.email,
number: userInfo.user.number,
}}
onSubmit={async (values, actions) => {
try {
console.log("name", values.name);
console.log("phone", values.number);
const params = {
full_name: values.name,
email: values.email,
phone_number: values.number,
};
} catch (error) {
let message = error.message;
console.log(message)
} finally {
actions.setSubmitting(false);
}
}}
>
{({
handleChange,
setFieldValue,
handleSubmit,
values,
errors,
touched,
isSubmitting,
}) => (
<View style={styles.prheight}>
<View style={styles.form}>
<Text style={styles.r}>One Last Step</Text>
<TextInput
style={styles.forminput}
label="Name"
value={values.name}
onChangeText={handleChange("name")}
/>
<TextInput
style={styles.forminput}
label="Email"
value={values.email}
onChangeText={handleChange("email")}
/>
<TextInput
style={styles.forminput}
label="Whatsapp Number"
keyboardType="numeric"
value={values.number}
onChangeText={handleChange("number")}
// value={this.state.myNumber}
maxLength={10} //setting limit of input
/>
</View>
<View style={styles.buttonw}>
<Button
color="#7743DB"
title="Lets Go"
onPress={() => handleSubmit()}
/>
</View>
</View>
)}
</Formik>
);
}
Your original method doesn't populate the state unless you edit the text input field, this is because your initialState doesn't have a value to start with. so firing getData() is reading empty state if the fields havent been changed.
onChangeText={text => setTextname(text)}
Only fire if you edit the textInput field.
Also I think you might be missing props, so first check if you are getting the correct data from props by logging it.
Once you have confirmed the props are available.
Set the initialState for name to userInfo.user.name
const { userInfo } = props?.route?.params;
const [name, setName] = useState(userInfo.user.name);
Then pass the state name to your TextInput and it should populate the value by reading from state.
return (
<>
<TextInput
placeholder="name"
value={name}
onChangeText={(text) => setName(text)}
/>
<Button title="Submit" onPress={() => getData()} />
</>
)
Make sure to create states for any additional values you wish to save.
const [name, setName] = useState(userInfo.user.name);
const [email, setEmail] = useState(userInfo.user.email);
You can use a library like https://react-hook-form.com to check an example with react native on video.
Or you can right it yourself, in the example below any time you need access to input values you can read it from text and number
const UselessTextInput = () => {
const [text, onChangeText] = useState("Useless Text");
const [number, onChangeNumber] = useState(null);
return (
<SafeAreaView>
<TextInput
style={styles.input}
onChangeText={onChangeText}
value={text}
/>
<TextInput
style={styles.input}
onChangeText={onChangeNumber}
value={number}
placeholder="useless placeholder"
keyboardType="numeric"
/>
</SafeAreaView>
);
};
You can do something like this!!
export default function Signupfor(props) {
const {userInfo, log} = props?.route?.params;
const [name, setName] = useState(userInfo?.user?.name);
const [phone, setPhone] = useState(userInfo?.user?.number);
function getdata() {
console.log("name",name)
console.log("phone",phone)
}
return (
<View style={styles.prheight}>
<View style={styles.form}>
<Text style={styles.r}>One Last Step</Text>
<TextInput
style={styles.forminput}
label="Name"
// this value must be same with useState
value={name}
onChangeText={text => setName(text)}
/>
<TextInput
style={styles.forminput}
label="Mobile"
value={phone}
onChangeText={text => setPhone(text)}
/>
</View>
<View style={styles.buttonw}>
<Button color="#7743DB" title="Lets Go" onPress={() => getdata()} />
</View>
</View>
);
}
Same goes for email.
Hi I am new to React Native.
I want to open a modal from another modal.
I have a modal showing event details and user can delete this event. When they press delete button, I want to add another modal saying 'are you sure ?' as in the picture
[![enter image description here][1]][1]
My code doesn't work. I used onModalHide with setTimeOut to close the first one and opend the second one. But did not work. What can be the error here ?
import React, {useRef, useState} from 'react';
import {View, ScrollView, Text, Pressable} from 'react-native';
import styles from '#/screens/dashboard/events/CreatedEventDetails.styles';
import Modal from 'react-native-modal';
import common from '#/config/common';
import {useDispatch, useSelector} from 'react-redux';
import FastImage from 'react-native-fast-image';
import images from '#/config/images';
import {Icon, LoadingIndicator} from '#/components';
import {
closeEventDetailsModal,
fetchEventsList,
handleDeleteEvent,
handleWithDrawEvent,
LOADING,
} from '#/store/events/events';
import {EVENT_STATUS} from '#/constants/eventStatus';
import {strings} from '#/localization';
import moment from 'moment';
const CreatedEventDetails = ({isVisible, closeModal}) => {
const createdEventDetails = useSelector(state => state?.events?.eventDetails);
const userInfo = useSelector(state => state.profile.user);
const dispatch = useDispatch();
const currentEventId = useSelector(state => state.events.currentEventId);
const isLoading =
useSelector(state => state?.events?.eventResponseStatus) === LOADING;
const capitilizedLetter = createdEventDetails?.name
?.toLowerCase()
.charAt(0)
.toUpperCase();
const restOfTheName = createdEventDetails?.name?.slice(1);
const deleteEvent = id => {
dispatch(handleDeleteEvent(id));
dispatch(closeEventDetailsModal());
};
const withDrawEvent = id => {
dispatch(handleWithDrawEvent(id));
dispatch(closeEventDetailsModal());
};
function getBgColor(condition) {
switch (condition) {
case EVENT_STATUS.STATUS_NEW:
return '#ef9d50';
case EVENT_STATUS.STATUS_ACCEPTED:
return '#a1dc6a';
case EVENT_STATUS.STATUS_TENTATIVE:
return 'blue';
case EVENT_STATUS.STATUS_REJECTED:
return 'red';
default:
return '#ef9d50';
}
}
// to change the modal action according to created events or accepted events, we have to check
// if the logged in user id is matching with event owner id. ( delete - withdraw action )
const isOwner = createdEventDetails?.owner?.id === userInfo?.id;
const createdEventDate = createdEventDetails?.event_date;
const formattedDate = moment(createdEventDate).format('DD MMM, ddd');
const fromTime = createdEventDetails?.from_time?.toString();
const formattedFromTime = moment(fromTime, 'hh:mm').format('LT');
const toTime = createdEventDetails?.to_time?.toString();
const formattedToTime = moment(toTime, 'hh:mm').format('LT');
// second modal state
const [isDeleteModalVisible, setIsDeleteModalVisible] = useState(false);
// second modal function
const toggleModal = () => {
// when the second modal is open, I close the first one here.
dispatch(closeEventDetailsModal());
setIsDeleteModalVisible(!isDeleteModalVisible);
};
return (
<>
<View style={styles.modalContainer}>
<Modal
isVisible={isVisible}
propagateSwipe
onBackdropPress={() => this.setState(isVisible)}
onModalHide={() => {
setTimeout(() => {
setIsDeleteModalVisible(!isDeleteModalVisible);
}, 100);
}}
onModalWillHide={() => {
setTimeout(() => {
dispatch(fetchEventsList());
}, 500);
}}>
<View style={styles.content}>
{/* we have to check if event id is matching with currentEventId to prevent undefined problem
and also modal detail can have previous event detail. this will prevent the issue */}
{createdEventDetails.id !== currentEventId ? (
<LoadingIndicator visible />
) : (
<View>
<LoadingIndicator visible={isLoading} />
<View style={styles.closeBtnContainer}>
<Pressable style={styles.closeBtn} onPress={closeModal}>
<Text style={styles.closeText}>X</Text>
</Pressable>
</View>
<View>
<Text
style={
styles.contentTitle
}>{`${capitilizedLetter}${restOfTheName}`}</Text>
<Text style={styles.contenSubtTitle}>
{formattedDate}
{'\n'}
{formattedFromTime} - {formattedToTime}
</Text>
<Text style={styles.contentText}>
At {createdEventDetails?.location}
</Text>
<View style={styles.participantsContainer}>
<Text style={styles.contentTitle}>
{strings.eventDetails.participantsTitle} (
{createdEventDetails?.invites?.length})
</Text>
<View style={common.stickyButtonLine} />
<ScrollView>
{createdEventDetails?.invites?.map(invite => (
<View style={styles.checkboxContainer} key={invite.id}>
<View style={styles.imageContainer}>
{invite?.user?.thumb ? (
<FastImage
source={{uri: invite?.user?.thumb}}
style={styles.listItemUserImage}
resizeMode={FastImage.resizeMode.cover}
/>
) : (
<Icon
icon={images.ic_user}
style={styles.noUserIcon}
/>
)}
<Text style={styles.contentPersonName}>
{invite?.user?.name}
</Text>
</View>
<View
style={{
backgroundColor: getBgColor(invite?.status),
width: 25,
height: 25,
borderRadius: 25,
}}>
<Text>{''}</Text>
</View>
</View>
))}
</ScrollView>
</View>
<View>
<View>
<Text style={styles.contentTitle}>
{strings.eventDetails.hobbiesTitle} (
{createdEventDetails?.hobbies?.length})
</Text>
<View style={common.stickyButtonLine} />
<View style={styles.hobbiesContainer}>
{createdEventDetails?.hobbies?.map(hobby => (
<View style={styles.emojiContainer} key={hobby.id}>
<Text>{hobby.emoji}</Text>
</View>
))}
</View>
<View style={common.stickyButtonLine} />
</View>
<View style={[styles.buttons, styles.singleButtonAlign]}>
{isOwner ? (
<>
<Pressable
style={styles.decline}
onPress={toggleModal}
// onPress={() =>
// deleteEvent(createdEventDetails?.id)
// }
>
<Text style={styles.declineText}>
{strings.eventDetails.delete}
</Text>
</Pressable>
// second modal content here
{/* <Modal
isVisible={isDeleteModalVisible}
propagateSwipe>
<View style={styles.content}>
<Text>Hello!</Text>
<Pressable
title="Hide modal"
onPress={toggleModal}
/>
</View>
</Modal> */}
</>
) : (
<Pressable
style={styles.decline}
onPress={() =>
withDrawEvent(createdEventDetails?.id)
}>
<Text style={styles.declineText}>
{strings.eventDetails.withdraw}
</Text>
</Pressable>
)}
</View>
</View>
</View>
</View>
)}
</View>
</Modal>
</View>
// second modal content here
<View style={styles.modalContainer}>
<Modal isVisible={isDeleteModalVisible} propagateSwipe>
<View style={styles.content}>
<Text>Hello!</Text>
<Pressable title="Hide modal" onPress={toggleModal} />
</View>
</Modal>
</View>
</>
);
};;
export default CreatedEventDetails;
````
[1]: https://i.stack.imgur.com/BUMfa.png
Here are some way of debugging.
first check both the modal is showing up by passing harcoded true value for one by one.
if its working correctly, remove those timeouts and apicalls and
just check with useState only.
if all are fine then try to call
the api.
In my react native chat application i add recording audio functionality, when start recording function in called i put the number of recorded seconds in state and showing them to user. but after doing this stop function in calling but the recording is not stopping. here is my code -
import React from 'react';
import { View, TouchableOpacity, Text} from 'react-native';
import AudioRecorderPlayer from 'react-native-audio-recorder-player';
const [rectime, setrectime] = useState(0)
export default function ChatScreen({ navigation, user, route }) {
const audioRecorderPlayer = new AudioRecorderPlayer();
const dirs = RNFetchBlob.fs.dirs;
const path = Platform.select({
ios: 'hello.m4a',
android: `${dirs.CacheDir}/hello.mp3`,
});
const onStartRecord = async () => {
await audioRecorderPlayer.startRecorder(path);
audioRecorderPlayer.addRecordBackListener(e => {
console.log('Recording . . . ', e);
setrectime(e.currentPosition / 1000)
});
};
const onStopRecord = async () => {
const audio = await audioRecorderPlayer.stopRecorder().then(() => {
})
return (() => {
alert('stop')
audioRecorderPlayer.removeRecordBackListener()
setrectime(0)
})
sendmp3(path)
};
return(
<View style={[styles.footer]}>
<TouchableOpacity activeOpacity={0.5} onPress={() => onStartRecord()} style=
{styles.btnSendd}>
<Ionicons name={'mic-circle-outline'} size={24} color={'#000'} />
</TouchableOpacity>
<TouchableOpacity activeOpacity={0.5} onPress={() => onStopRecord()} style=
{styles.btnSendd}>
<Ionicons name={'mic-circle-outline'} size={24} color={'#efc100'} />
</TouchableOpacity>
{
rectime > 0
?
<View style={styles.rectime}>
<Text style={{ fontSize: 15 }}>{rectime.toFixed(0)}</Text>
</View>
:
<>
<TouchableOpacity activeOpacity={0.5} onPress={handleVideoPicker} style=
{styles.btnSendd}>
<Ionicons name={'videocam-outline'} size={24} color={'black'} />
</TouchableOpacity>
<TouchableOpacity style={styles.btnSendd} activeOpacity={0.5} onPress=
{handlePhotoPicker}>
<Ionicons name={'camera-outline'} size={24} color={'black'} />
</TouchableOpacity>
</>
}
)
}
In react native app, I have a home screen and a second screen that the user uses to add items that should be displayed on the home screen. I am using context to save the list of items. The problem is when I add items to the second screen and go to the home screen. The displayed list is empty.
Any help to explain why this happens and how to handle it? Here's the
Data Context
export const ExpenseContext = createContext();
App.js
const Stack = createNativeStackNavigator();
function App() {
const [expenseList, setExpenseList] = useState([]);
return (
<NavigationContainer>
<ExpenseContext.Provider value={{ expenseList, setExpenseList }}>
<Stack.Navigator>
<Stack.Screen
name="Home"
component={Home}
options={{ title: "Dashboard" }}
/>
<Stack.Screen
name="AddItem"
component={AddItem}
options={{ title: "CashFlowCreate" }}
/>
</Stack.Navigator>
</ExpenseContext.Provider>
</NavigationContainer>
);
}
export default App;
Home.js
function Home({ route, navigation }) {
const { expenseList } = useContext(ExpenseContext);
return (
<View style={styles.container}>
<Text style={styles.text}>Budget:</Text>
<Button title="+" onPress={() => navigation.navigate("AddItem")} />
<View>
<FlatList
style={styles.listContainer}
data={expenseList}
renderItem={(data) => <Text>{data.item.name}</Text>}
/>
</View>
</View>
);
}
export default Home;
AddItem.js
function AddItem({ navigation }) {
const { expenseList, setExpenseList } = useContext(ExpenseContext);
const [name, setName] = useState("");
const [amount, setAmount] = useState("");
const itemsList = expenseList;
return (
<View style={styles.container}>
<TextInput
style={styles.input}
onChangeText={(name) => setName( name )}
value={name}
placeholder="Name"
keyboardType="default"
/>
{name === "" && (
<Text style={{ color: "red", fontSize: 12, paddingLeft: 12 }}>
Name is required
</Text>
)}
<TextInput
style={styles.input}
onChangeText={(amount) => setAmount( amount )}
value={amount}
placeholder="Amount"
keyboardType="numeric"
/>
{amount === "" && (
<Text style={{ color: "red", fontSize: 12, paddingLeft: 12 }}>
Amount is required
</Text>
)}
<Button
title="Add"
style={styles.btn}
onPress={() => {
if (name === "" || amount === "") {
alert("Please Enter the required values.");
} else {
itemsList.push({
name: name,
amount: amount,
});
setExpenseList(itemsList);
}
}}
/>
<Button
title="View Dashboard"
style={styles.btn}
onPress={() => {
navigation.navigate("Home");
}}
/>
</View>
);
}
export default AddItem;
I solve it, in AddItem component remove const itemsList = expenseList; and onPress add button it should be like that instead
onPress={() => {
name === "" || amount === ""
? alert("Please Enter the required values.")
: setExpenseList([
...expenseList,
{
key:
Date.now().toString(36) +
Math.random().toString(36).substr(2),
name: name,
amount: amount,
},
]);
}}
I added the key because I needed later on.
There are several areas of issues in your code. One issue I can see is in AddItem. When you set:
const itemsList = expenseList
I think you did this for:
itemsList.push({
name: name,
amount: amount,
});
But you should look at the spread operator and try:
setExpenseList(...expenseList, {
name,
amount,
})
rewrite of AddItem.js:
function AddItem({ navigation }) {
const { expenseList, setExpenseList } = useContext(ExpenseContext)
const [name, setName] = useState('')
const [amount, setAmount] = useState('')
return (
<View style={styles.container}>
<TextInput style={styles.input} onChangeText={setName} value={name} placeholder='Name' keyboardType='default' />
{name === '' ? <Text style={styles.err}>Name is required</Text> : null}
<TextInput style={styles.input} onChangeText={setAmount} value={amount} placeholder='Amount' keyboardType='numeric' />
{amount === '' ? <Text style={styles.err}>Amount is required</Text> : null}
<Button
title='Add'
style={styles.btn}
onPress={() => {
name === '' || amount === ''
? alert('Please Enter the required values.')
: setExpenseList(...expenseList, {
name: name,
amount: amount,
})
}}
/>
<Button title='View Dashboard' style={styles.btn} onPress={() => navigation.navigate('Home')} />
</View>
)
}
export default AddItem
In your Home.js your FlatList it's missing the keyExtractor and you're trying to declare a prop of title outside of <Text>, rewrite:
function Home({ navigation }) {
const { expenseList } = useContext(ExpenseContext);
return (
<View style={styles.container}>
<Text style={styles.text}>Budget:</Text>
<Button title="+" onPress={() => navigation.navigate("AddItem")} />
<View>
<FlatList
style={styles.listContainer}
data={expenseList}
keyExtractor={(_,key) => key.toString()}
renderItem={(data) => <Text>{data.item.name}</Text>}
/>
</View>
</View>
);
}
export default Home;
Edit:
Answering to the comment. My understanding of the docs that is incorrect because keyExtractor is for identifying the id and by your commented code unless your passed in data to FlatList has a property of key then that wont work.
Also if key is not a string it should be:
keyExtractor={(item) => item.key.toString()}
I'm new to react-native. This component below should render comments posted by users, I would like to add an inputText component from react-native to allow users to post a comment, but don't know where I should place it within the code below.
import React, { useState, useEffect } from 'react';
import { useNavigation } from "#react-navigation/native";
import Icon from 'react-native-vector-icons/AntDesign';
import {
StyleSheet,
Text,
View,
TouchableOpacity,
Image,
ScrollView,
FlatList,
Button,
TextInput
} from 'react-native';
import parseDate from "../utils/parseDate";
import * as API from "../api/api"
export default function CommentList({ ride }) {
const [text, setText] = React.useState("");
const [commentsData, setComments] = useState([]);
const navigation = useNavigation();
useEffect(() => {
API.getCommentsByRideId(ride.ride_id).then((comments) => {
setComments(comments)
})
}, [ride.ride_id])
deleteComment = (comment_id) => {
// useEffect(() => {
API.deleteCommentsByCommentId(comment_id).then(() => {
const updatedComments = list.filter((item) => item.comment_id !== comment_id);
setComments(updatedComments)
})
// }, [comment_id])
}
//deletes on refresh only
addComment = (newComment, ride_id) => {
API.postCommentByRideId(newComment, ride_id).then(() => {
setComments(newComment)
})
}
return (
<FlatList
style={styles.root}
data={commentsData}
ItemSeparatorComponent={() => {
return (
<View style={styles.separator} />
)
}}
keyExtractor={(item) => {
return item.author;
}}
renderItem={(item) => {
const comment = item.item;
return (
<View style={styles.container}>
<TouchableOpacity onPress={() => navigation.navigate("UserProfile", { username: item.author })}>
{/* <Image style={styles.image} source={{ uri: comment.avatar_url }} /> */}
</TouchableOpacity>
<View style={styles.content}>
<View style={styles.contentHeader}>
<Text style={styles.name}>{comment.author}</Text>
<Text style={styles.time}>
{parseDate(comment.created_at)}
{comment.votes}
</Text>
</View>
<Text rkType='primary3 mediumLine'>{comment.body}</Text>
{/* <Text style={styles.time}> Likes: {comment.votes}</Text> */}
<TouchableOpacity onPress={() => deleteComment(comment.comment_id)}>
<Icon name="delete" size={20} color="#e33057" />
</TouchableOpacity>
</View>
</View>
);
}} />
);
}
This is the inputText I would like to add to allow users to post a comment.
<TextInput
value={text}
placeholder="write..."
onChangeText={text => setText(text)}
onSubmitEditing={() => addcomment(text, ride.ride_id)}
/>
if you want to add it at fixed position in bottom of screen you may do this
<View style={{flex : 1}}>
<Flatlist
contentContainerStyle={{paddingBottom: 50}}
.../>
<View style={{position : 'absolute', bottom : 0, width : '100%', height : 50}}>
//you input here
</View>
</View>
or if you want to add it last item of flatlist you may use ListFooterComponent
<FlatList
ListFooterComponent={<Input/>}
.../>
</FlatList>