I'm trying to get each button to activate and "switch-on" when pressed, and I've used some documentation to help me. However, now it is not switching on.
Code Adds Switches in a FlatList
The Data should look like this:
https://imgur.com/a/761PSjre
Also, feel free to judge my code to the darkest depths of hell. I'm trying to improve my code.
import React from 'react'
import {StyleSheet, View,Text, Switch, Button, Alert, ScrollView, FlatList, SafeAreaView} from 'react-native'
export default () => {
const DATA = [
{
index: 1,
title: 'Toggle Night Mode',
},
{
index: 2,
title: 'Remind me to take a break',
},
{
index: 3,
title: "Remind me when it's bedtime",
},
];
const [enabledSwitches, setEnabledSwitches] = React.useState(DATA.length);
const toggleSwitch = () => setEnabledSwitches(previousState => !previousState);
function Item({title, index}) {
return (
<View>
<Text style={styles.text}> {title} </Text>
<Switch
trackColor={{ false: "#767577", true: "#81b0ff" }}
thumbColor="#f5dd4b"
ios_backgroundColor="#3e3e3e"
value={enabledSwitches[index]}
onValueChange={() => toggleSwitch(switches => {
switches[index] = !switches[index];
return switches;
})}
/>
</View>
)
}
function Header(){
return(
<View style = {styles.header}>
<Text style={styles.headertext}>Settings</Text>
</View>
)
}
return (
<>
<View style = {styles.container}>
<FlatList
data = {DATA}
keyExtractor = {item => item.id}
renderItem = {({ item, index }) => <Item title={item.title} index={index} /> }
ListHeaderComponent = {Header()}
/>
</View>
<View>
<Button
title = "Clear Search History"
color = "#6fb6f0"
onPress = {() => Alert.alert('Food History Has Been Cleared!')}
/>
</View>
<View>
<Button
title = "Logout"
color = "#6fb6f0"
onPress = {() => Alert.alert('Successfully Logged Out!')}
/>
</View>
</>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
text: {
fontSize: 20,
fontWeight: "300"
},
headertext: {
fontSize: 30,
fontWeight: "300"
},
header:{
flex:1,
justifyContent: 'center',
alignItems: 'center',
padding: 10,
backgroundColor: '#f5f5f5'
}
})
Try this way
import React from 'react'
import {StyleSheet, View,Text, Switch, Button, Alert, ScrollView, FlatList, SafeAreaView} from 'react-native'
export default () => {
// use data set in default state
const [data, setData] = React.useState([ {index: 1,title: 'Toggle Night Mode'},...]);
function toggleSwitch(value, index){
const newData = [...data];
const newData[index].isEnable = value;
setData(newData);
}
function Item({item, index}) {
return (
<View>
<Text style={styles.text}> {item.title} </Text> // use `title` here like this
<Switch
.....
value={item.isEnable || false} // change here
onValueChange={(value) => toggleSwitch(value, index) } // change here
/>
</View>
)
}
return (
<>
<View style = {styles.container}>
<FlatList
data = {data}
keyExtractor = {item => item.id}
renderItem = {({ item, index }) => <Item item={item} index={index} /> } // send `item` as prop
/>
</View>
</>
);
}
Related
i want to do paging but i cant limit the item to 10. this code shows all the items.
these are not working as well -initialNumToRender,maxToRenderPerBatch,windowSize
<FlatList
data={DATA}
renderItem={({ item }) => (
<Item title={item.name} />
)}
keyExtractor={item => item.id}
ItemSeparatorComponent={ItemSeparatorView}
initialNumToRender={11}
maxToRenderPerBatch={5}
windowSize={2}
/>
Try this,
import React, {useState, useEffect} from 'react';
//import all the components we are going to use
import {
SafeAreaView,
View,
Text,
TouchableOpacity,
StyleSheet,
FlatList,
ActivityIndicator,
} from 'react-native';
const App = () => {
const [loading, setLoading] = useState(true);
const [dataSource, setDataSource] = useState([]);
const [offset, setOffset] = useState(1);
useEffect(() => getData(), []);
const getData = () => {
console.log('getData');
setLoading(true);
//Service to get the data from the server to render
fetch('https://aboutreact.herokuapp.com/getpost.php?offset='
+ offset)
//Sending the currect offset with get request
.then((response) => response.json())
.then((responseJson) => {
//Successful response
setOffset(offset + 1);
//Increasing the offset for the next API call
setDataSource([...dataSource, ...responseJson.results]);
setLoading(false);
})
.catch((error) => {
console.error(error);
});
};
const renderFooter = () => {
return (
//Footer View with Load More button
<View style={styles.footer}>
<TouchableOpacity
activeOpacity={0.9}
onPress={getData}
//On Click of button load more data
style={styles.loadMoreBtn}>
<Text style={styles.btnText}>Load More</Text>
{loading ? (
<ActivityIndicator
color="white"
style={{marginLeft: 8}} />
) : null}
</TouchableOpacity>
</View>
);
};
const ItemView = ({item}) => {
return (
// Flat List Item
<Text
style={styles.itemStyle}
onPress={() => getItem(item)}>
{item.id}
{'.'}
{item.title.toUpperCase()}
</Text>
);
};
const ItemSeparatorView = () => {
return (
// Flat List Item Separator
<View
style={{
height: 0.5,
width: '100%',
backgroundColor: '#C8C8C8',
}}
/>
);
};
const getItem = (item) => {
//Function for click on an item
alert('Id : ' + item.id + ' Title : ' + item.title);
};
return (
<SafeAreaView style={{flex: 1}}>
<View style={styles.container}>
<FlatList
data={dataSource}
keyExtractor={(item, index) => index.toString()}
ItemSeparatorComponent={ItemSeparatorView}
enableEmptySections={true}
renderItem={ItemView}
ListFooterComponent={renderFooter}
/>
</View>
</SafeAreaView>
);
};
const styles = StyleSheet.create({
container: {
justifyContent: 'center',
flex: 1,
},
footer: {
padding: 10,
justifyContent: 'center',
alignItems: 'center',
flexDirection: 'row',
},
loadMoreBtn: {
padding: 10,
backgroundColor: '#800000',
borderRadius: 4,
flexDirection: 'row',
justifyContent: 'center',
alignItems: 'center',
},
btnText: {
color: 'white',
fontSize: 15,
textAlign: 'center',
},
});
export default App;
My code fetches a json file, calculates a value and I want to pass this value into the style of TouchableOpacity. Below is my attempt:
const [height, setHeight] = useState(0)
const [isLoading, setLoader] = useState(true)
const fetching = async () => {
...//code that fetches the value
setHeight(value)
setLoader(false)
}
if (isLoading) {
return (
<Text> Loading...</Text>
)
}
return (
<View>
<TouchableOpacity
style={{height: height, width:30, backgroundColor: "red" }} />
... //other parts of the return statement
</View>
)
the complete code:
<View style={{height: height}}>
<TouchableOpacity
style={{width:30, borderWidth:5, marginTop:20, backgroundColor:"blue", height:height}}>
</TouchableOpacity>
</View>
Any help would be appreciated.
I think your useState is fine. However either the parent View doesn't have any space or the TouchableOpacity has nothing to display.
You can try to do:
return (
<View>
<TouchableOpacity
style={{height, width:30, borderWidth: 5 }} />
... //other parts of the return statement
</View>
)
If you see no border, then it's a problem with the parent View
You can then try:
return (
<View style={{flex: 1}}>
<TouchableOpacity
style={{height, width:30, borderWidth: 5 }} />
... //other parts of the return statement
</View>
)
You could also try adding a Text component with some text to the TouchableOpacity.
This code:
import React, { useEffect, useState } from 'react';
import {Text, View, TouchableOpacity} from 'react-native';
export default function App() {
const [height, setHeight] = useState(0)
const [isLoading, setLoader] = useState(true)
useEffect(() => {
const timerTask = setInterval(() => {
setHeight(Math.random() * 200)
setLoader(false);
}, 5000);
return () => clearInterval(timerTask);
}, [])
if (isLoading) {
return (
<Text> Loading...</Text>
)
}
return (
<View style={{flex: 1, alignItems: 'center', justifyContent: 'center' }}>
<TouchableOpacity
style={{width: 30, borderWidth: 5, marginTop: 20, backgroundColor: "blue", height}}>
</TouchableOpacity>
</View>
)
}
Produces a blue touchable opacity that changes height every 5 seconds. Also when I touch it, it turns a lighter shade.
It seems to me you might not be passing the style property in the render function of TouchableOpacity, TouchableOpacity is your own custom component, isn't it?
const TouchableOpacity = ({ style }) => {
...
return (
<div style={style} >
...
</div>
);
}
Add a height and width to your element's style
height: 50,
width: '100%',
backgroundColor: "#000000"
Srry if the title makes no sense. Don't know a better title.
How can I save route.params items that I pass to my second screen using AsyncStorage?
In my first screen i have a bunch of data in a FlatList that can be opened with a Modal. Inside that Modal I have a TouchableOpacity that can send the data thats inside the Modal to my second screen. The data that has been passed to the second screen is passed to a FlatList. The data in the FlatList should be saved to AsyncStorage. Tried alot of things getting this to work, but only getting warning message
undefined. Code below is the most recent progress.
Using React Navigation V5.
FIRST SCREEN
const [masterDataSource, setMasterDataSource] = useState(DataBase);
const [details, setDetails] = useState('');
<TouchableOpacity
onPress={() => {
const updated = [...masterDataSource];
updated.find(
(item) => item.id === details.id,
).selected = true;
setMasterDataSource(updated);
navigation.navigate('cart', {
screen: 'cart',
params: {
items: updated.filter((item) => item.selected),
},
});
setModalVisible(false);
}}>
<Text>Add to cart</Text>
</TouchableOpacity>
SECOND SCREEN
import React, { useEffect, useState } from 'react';
import { View, Text, FlatList, TouchableOpacity } from 'react-native';
import { useTheme } from '../Data/ThemeContext';
import AsyncStorage from '#react-native-async-storage/async-storage';
import Ionicons from 'react-native-vector-icons/Ionicons';
export default function ShoppingList({ route, navigation }) {
const [shoppingList, setShoppingList] = useState([]);
const { colors } = useTheme();
const todo = () => {
alert('Todo');
};
useEffect(() => {
restoreShoppingListAsync();
}, []);
const shoppingListAsync = () => {
const shoppingList = route.params && route.params.items;
setShoppingList(list);
storeShoppingList(list);
};
const asyncStorageKey = '#ShoppingList';
const storeShoppingListAsync = (list) => {
const stringifiedList = JSON.stringify(list);
AsyncStorage.setItem(asyncStorageKey, stringifiedList).catch((err) => {
console.warn(err);
});
};
const restoreShoppingListAsync = () => {
AsyncStorage.getItem(asyncStorageKey)
.then((stringifiedList) => {
console.log(stringifiedList);
const parsedShoppingList = JSON.parse(stringifiedList);
if (!parsedShoppingList || typeof parsedShoppingList !== 'object')
return;
setShoppingList(parsedShoppingList);
})
.then((err) => {
console.warn(err);
});
};
const RenderItem = ({ item }) => {
return (
<View>
<TouchableOpacity
style={{
marginLeft: 20,
marginRight: 20,
elevation: 3,
backgroundColor: colors.card,
borderRadius: 10,
}}>
<View style={{ margin: 10 }}>
<Text style={{ color: colors.text, fontWeight: '700' }}>
{item.name}
</Text>
<Text style={{ color: colors.text }}>{item.gluten}</Text>
<Text style={{ color: colors.text }}>{item.id}</Text>
</View>
</TouchableOpacity>
</View>
);
};
const emptyComponent = () => {
return (
<View style={{ alignItems: 'center' }}>
<Text style={{ color: colors.text }}>Listan är tom</Text>
</View>
);
};
const itemSeparatorComponent = () => {
return (
<View
style={{
margin: 3,
}}></View>
);
};
return (
<View
style={{
flex: 1,
}}>
<View
style={{
padding: 30,
backgroundColor: colors.Textinput,
elevation: 12,
}}>
<View style={{ flexDirection: 'row', justifyContent: 'space-between' }}>
<TouchableOpacity onPress={() => navigation.goBack()}>
<Ionicons name="arrow-back-outline" size={25} color="#fff" />
</TouchableOpacity>
<Text style={{ color: '#fff', fontSize: 20 }}>Inköpslista</Text>
<TouchableOpacity>
<Ionicons
name="trash-outline"
size={25}
color="#fff"
onPress={() => todo()}
/>
</TouchableOpacity>
</View>
</View>
<View style={{ flex: 1, marginTop: 30 }}>
<FlatList
data={shoppingList}
renderItem={RenderItem}
ListEmptyComponent={emptyComponent}
ItemSeparatorComponent={itemSeparatorComponent}
initialNumToRender={4}
maxToRenderPerBatch={5}
windowSize={10}
removeClippedSubviews={true}
updateCellsBatchingPeriod={100}
showsVerticalScrollIndicator={true}
contentContainerStyle={{ paddingBottom: 20 }}
/>
</View>
</View>
);
}
As you are using async storage to maintain the cart.
I would suggest an approach as below
Update the asyn storage when new items are added to or removed from the cart
Retrieve the items from the cart screen and show the items there
Before you navigate store the items like below
AsyncStorage.setItem(
'Items',
JSON.stringify(updated.filter((item) => item.selected))
).then(() => {
navigation.navigate('Cart', {
items: updated.filter((item) => item.selected),
});
});
The cart screen would be something like below
function Cart({ navigation, route }) {
const [data,setData]=useState([]);
React.useEffect(() => {
async function fetchMyAPI() {
const value = await AsyncStorage.getItem('Items');
setData(JSON.parse(value));
}
fetchMyAPI();
}, []);
return (
<View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
<Button title="Go back" onPress={() => navigation.goBack()} />
<FlatList
data={data}
renderItem={RenderItem}
/>
</View>
);
}
Working Example
https://snack.expo.io/#guruparan/cartexample
I have two components the first where user can add a place to the favorites and the second is favorites component where user may see all his favorite places. When the user for the first time opens the favorites component everything works as expected: all the favorite places that user has already added to the favorites rendered. But if user go to the first component and add one more place and then go to the second component new place will not appear because component has already rendered and the state didn't changed because useEffect not triggered. Help me please what should I use in my FavouritePlaces component instead of useEffect to rerender this component every time when user open FavouritePlaces?
Component where user can add to favorites:
const ModalWindow = ({navigateToPlace, sendDataToParent, visible, marker}: HomeNavigationProps<"ModalWindow">) => {
const regex = /(<([^>]+)>)|( )|(&nbps)/ig;
const result = marker.description.replace(regex, '');
const [favKeys, setFavKeys] = useState([]);
const onDismiss = () => {
sendDataToParent(false)
}
const onNavigationTap = () => {
onDismiss();
navigateToPlace(true, marker.coordinates);
}
const getFavourites = async () => {
let keys = []
keys = await AsyncStorage.getAllKeys()
setFavKeys(keys);
}
const onHeartPress = async () => {
const jsonValue = JSON.stringify(marker)
try {
if (favKeys.includes(marker.id.toString())){
await AsyncStorage.removeItem(marker.id.toString())
await getFavourites();
} else {
await AsyncStorage.setItem(marker.id.toString(), jsonValue)
await getFavourites();
}
} catch (e) {
console.log('error in onHeartPress', e)
}
console.log('Done.')
//remove after test
try {
await AsyncStorage.removeItem('__react_native_storage_test')
} catch(e) {
// remove error
}
console.log('Done.')
}
return (
<Modal visible={visible} onDismiss={onDismiss} contentContainerStyle={styles.container}>
<IconButton
style={
styles.iconButton
}
icon="close"
color={Colors.black}
size={30}
onPress={() => onDismiss()}
/>
<Text
style={{fontStyle: "italic", fontSize: 20, alignSelf: "center", maxWidth: '75%'}}>{marker.title}
</Text>
<CustomCarousel {...{marker}} />
<ScrollView showsVerticalScrollIndicator={false} style={{marginTop: '3%', marginLeft: '3%', marginRight: '3%'}}>
<Text>{result}</Text>
</ScrollView>
<View style={{flexDirection: "row", justifyContent: "space-around", marginLeft: "3%", marginRight: "3%", marginBottom: "15%"}}>
<TouchableOpacity onPress={() => onNavigationTap()}>
<View style={{flexDirection: "row", alignItems: "center"}}>
<Ionicons size={height/20} name={'navigate-circle-outline'} />
</View>
</TouchableOpacity>
<TouchableOpacity onPress={() => onHeartPress()}>
{marker.id ?
<View style={{flexDirection: "row", alignItems: "center"}}>
{favKeys.includes(marker.id.toString()) ? <Ionicons size={height/20} name={'heart-dislike'} /> : <Ionicons size={height/20} name={'heart'} />}
</View> : undefined}
</TouchableOpacity>
</View>
</Modal>
);
}
export default ModalWindow;
My Favorite Places component:
const FavouritePlaces = ({navigation}: HomeNavigationProps<"FavouritePlaces">) => {
const [markers, setMarkers] = useState([]);
useEffect(() => {
const getFavourites = async () => {
let keys = []
try {
keys = await AsyncStorage.getAllKeys()
} catch (e) {
// read key error
}
let values
try {
let forDeletion = ['__react_native_storage_test', 'NAVIGATION_STATE_KEY-40.0.0'];
keys = keys.filter(item => !forDeletion.includes(item))
values = await AsyncStorage.multiGet(keys)
setMarkers(values)
} catch (e) {
// read error
}
}
getFavourites();
}, [])
const transition = (
<Transition.Together>
<Transition.Out type='fade'/>
<Transition.In type='fade'/>
</Transition.Together>
);
const list = useRef<TransitioningView>(null);
const theme = useTheme()
const width = (wWidth - theme.spacing.m * 3) / 2;
const [footerHeight, setFooterHeight] = useState(0);
return (
<Box flex={1} backgroundColor="background">
<StatusBar style="black" />
<Header
title="Избранные места"
left={{icon: 'menu', onPress: () => navigation.openDrawer()}}
right={{icon: 'shopping-bag', onPress: () => true}}
/>
<Box flex={1}>
<ScrollView showsVerticalScrollIndicator={false} contentContainerStyle={{
paddingBottom: footerHeight,
}}>
<Transitioning.View ref={list} transition={transition} style={{}}>
{markers ?
<Box flexDirection='row' style={{justifyContent: "space-around"}}>
<Box>
{markers
.filter((_, i) => i % 2 === 0).map((currentMarker) => <Picture
key={currentMarker}
place={currentMarker}
width={width}
height={height}
/>)}
</Box>
<Box>
{markers
.filter((_, i) => i % 2 !== 0).map((currentMarker) => <Picture
key={currentMarker}
place={currentMarker}
width={width}
height={height}/>)}
</Box>
</Box> : undefined}
</Transitioning.View>
</ScrollView>
{/*<TopCurve footerHeight={footerHeight}/>*/}
<Box position='absolute' bottom={0} left={0} right={0} onLayout={({
nativeEvent: {
layout: {height},
}
}) => setFooterHeight(height)}>
</Box>
</Box>
</Box>
)
}
export default FavouritePlaces
Try this
useEffect(() => {
// ... Your code goes here
}, [navigation]);
this will render whenever update in navigate
I've found the solution. React navigation has hook useIsFocused, so what can we do is:
import { useIsFocused } from "#react-navigation/native";
const isFocused = useIsFocused();
useEffect(() => {
// ... Your code goes here
}, [isFocused]);
You can use React Context API to share the state across the screens.
Check out this Expo Snack I created.
import {
CompositeNavigationProp,
NavigationContainer,
NavigatorScreenParams,
} from '#react-navigation/native';
import {
createStackNavigator,
StackNavigationProp,
} from '#react-navigation/stack';
import * as React from 'react';
import {
Button,
FlatList,
ListRenderItem,
Text,
TextInput,
View,
} from 'react-native';
type MainStackParamsList = {
FavoritePlacesScreen: undefined;
};
type ModalStackParamsList = {
MainStack: NavigatorScreenParams<MainStackParamsList>;
AddFavoritePlacesModal: undefined;
};
type FavoritePlace = {
id: number;
name: string;
};
type FavoritePlacesContextValue = {
favoritePlaces: FavoritePlace[];
addNewFavoritePlace: (favoritePlace: FavoritePlace) => void;
removeFavoritePlace: (id: number) => void;
};
const FavoritePlacesContext = React.createContext<FavoritePlacesContextValue>({
favoritePlaces: [],
addNewFavoritePlace: () => {},
removeFavoritePlace: () => {},
});
const MainStack = createStackNavigator<MainStackParamsList>();
type FavoritePlacesScreenProps = {
navigation: CompositeNavigationProp<
StackNavigationProp<MainStackParamsList, 'FavoritePlacesScreen'>,
StackNavigationProp<ModalStackParamsList>
>;
};
const FavoritePlacesScreen = ({navigation}: FavoritePlacesScreenProps) => {
const {favoritePlaces, removeFavoritePlace} = React.useContext(
FavoritePlacesContext,
);
const renderItem = React.useCallback<ListRenderItem<FavoritePlace>>(
({item}) => {
return (
<View style={{height: 50, padding: 10, flexDirection: 'row'}}>
<Text style={{fontSize: 16}}>{item.name}</Text>
<Button onPress={() => removeFavoritePlace(item.id)} title="Remove" />
</View>
);
},
[removeFavoritePlace],
);
return (
<View style={{flex: 1}}>
<FlatList
data={favoritePlaces}
keyExtractor={(item) => String(item.id)}
renderItem={renderItem}
/>
<Button
onPress={() => {
navigation.navigate('AddFavoritePlacesModal');
}}
title="Add new favorite"
/>
</View>
);
};
const MainStackNavigator = () => {
return (
<MainStack.Navigator>
<MainStack.Screen
component={FavoritePlacesScreen}
name="FavoritePlacesScreen"
/>
</MainStack.Navigator>
);
};
type AddFavoritePlacesModalProps = {
navigation: StackNavigationProp<
ModalStackParamsList,
'AddFavoritePlacesModal'
>;
};
const AddFavoritePlacesModal = ({navigation}: AddFavoritePlacesModalProps) => {
const {addNewFavoritePlace} = React.useContext(FavoritePlacesContext);
const [favoritePlaceName, setFavoritePlaceName] = React.useState('');
const handleOnSave = React.useCallback(() => {
addNewFavoritePlace({
id: Date.now(),
name: favoritePlaceName,
});
navigation.goBack();
}, [addNewFavoritePlace, favoritePlaceName, navigation]);
return (
<View style={{flex: 1, justifyContent: 'center', alignItems: 'center'}}>
<View style={{borderRadius: 6, borderWidth: 1, borderColor: '#333'}}>
<TextInput
onChangeText={setFavoritePlaceName}
placeholder="Name your favorite place"
/>
</View>
<Button onPress={handleOnSave} title="Save" />
</View>
);
};
// Put the favorite places list screen and the add favorite place modal here.
// Then use FavoritePlacesContext.Provider to wrap ModalStack.Navigator in order
// for the context to be available on MainStack
const ModalStack = createStackNavigator<ModalStackParamsList>();
const ModalNavigator = () => {
const [favoritePlaces, setFavoritePlaces] = React.useState<FavoritePlace[]>(
[],
);
const addNewFavoritePlace = React.useCallback(
(favoritePlace: FavoritePlace) => {
setFavoritePlaces((prev) => [...prev, favoritePlace]);
},
[],
);
const removeFavoritePlace = React.useCallback((id: number) => {
setFavoritePlaces((prev) =>
prev.filter((favoritePlace) => favoritePlace.id !== id),
);
}, []);
return (
<FavoritePlacesContext.Provider
value={{
favoritePlaces,
addNewFavoritePlace,
removeFavoritePlace,
}}
>
<ModalStack.Navigator headerMode="none">
<ModalStack.Screen component={MainStackNavigator} name="MainStack" />
<ModalStack.Screen
component={AddFavoritePlacesModal}
name="AddFavoritePlacesModal"
options={{headerShown: false}}
/>
</ModalStack.Navigator>
</FavoritePlacesContext.Provider>
);
};
const App = () => {
return (
<NavigationContainer>
<ModalNavigator />
</NavigationContainer>
);
};
export default App;
I have been finding it very difficult to search a mapped list in react native. Actually, doing that with a Flatlist would be very easy for me, but this is really giving me a headache. I hope someone will be able to help me out.
So, the code looks like this
import React, { Component, useState } from 'react';
import { Button, Animated, Share, ScrollView,
ImageBackground, StyleSheet, View} from "react-native";
import { Container, Header, Content, ListItem, Item, Input, Text, Icon, Left, Body, Right, Switch } from 'native-base';
const Auslawpart = ({ route, navigation}) => {
const {parts, hereme} = route.params;
const [search, setSearch] = useState('');
const [filteredDataSource, setFilteredDataSource] = useState(parts);
const filterSearch = (text) => {
const newData = parts.filter((part)=>{
const itemData = part.name.toUpperCase()
const textData = text.toUpperCase()
return itemData.indexOf(textData)>-1
});
setFilteredDataSource(newData);
setSearch(text);
}
return (
<Container>
<Animated.View
style={{
transform:[
{translateY:translateY }
],
elevation:4,
zIndex:100,
}}
>
<View style={{
// marginTop:Constant.statusBarHeight,
position:"absolute",
top:0,
left:0,
right:0,
bottom: 0,
height: 50,
backgroundColor:"#f0f0f0",
borderBottomWidth: 1,
borderBottomColor: '#BDC3C7',
flexDirection:"row",
justifyContent:"space-between",
elevation: 4,
}}>
<View style={{margin: 10, flex: 1 }}>
<TouchableOpacity onPress={() => navigation.goBack()}>
<Icon type="MaterialIcons" name="arrow-back" style={{ left: 10, }}
size={50} />
</TouchableOpacity>
</View>
<View style={{
justifyContent:"space-around",
margin: 4,
flex: 1,
marginLeft:0,
}}>
<Text numberOfLines={3} style={{fontSize:10,
alignSelf: 'flex-end', color:"#212F3C",
padding: 2}}>{hereme}</Text>
</View>
</View>
</Animated.View>
<Content style={{marginTop:50}}>
<Item>
<Icon type= "MaterialIcons" />
<Input placeholder="Search legal terms and maxisms"
onChangeText={(text) => filterSearch(text)}
/>
<Icon type="Octicons" name="law" />
</Item>
{parts.map((part) => (
<TouchableOpacity
key={part.name}
>
<ListItem onPress={() =>
navigation.navigate("Auslawcount", {
meaning: part.meaning,
partname: part.name})
}>
<Icon type="Octicons" name="law" />
<Body>
<Text onScroll={(e)=>{
scrollY.setValue(e.nativeEvent.contentOffset.y)
}} style={{ fontSize: 17, fontFamily: "Lato-Regular",}} key={part.name}>{part.name.toUpperCase()}</Text>
</Body>
</ListItem>
</TouchableOpacity>
))}
</Content>
</Container>
);
};
export default Auslawpart;
The data in part.name are passed from another screen to this screen. I am try to make the Input field search through the mapped part.name. can anybody please help me with a solution.
Here is an Example
snack: https://snack.expo.io/#ashwith00/bold-waffles
const data = [
{ name: 'Suleman' },
{ name: 'Sulan' },
{ name: 'Suljan' },
{ name: 'Ram' },
{ name: 'Raj' },
];
const Auslawpart = ({ route, navigation }) => {
const {} = route.params;
const [filteredDataSource, setFilteredDataSource] = useState(parts);
const filterSearch = (text) => {
if (text.length > 0) {
const newList = data.filter((part) => {
const name = part.name.toUpperCase();
const textData = text.toUpperCase();
return name.includes(textData);
});
setFilteredDataSource(newList);
} else {
setFilteredDataSource(parts);
}
};
return (
<View>
<TextInput placeholder="Enter here" onChangeText={filterSearch} />
<ScrollView>
{filteredDataSource.map((item, i) => (
<Text key={i} style={{ paddingVertical: 30 }}>
{item.name}
</Text>
))}
</ScrollView>
</View>
);
};