TouchableOpacity's onPress is not working - react-native

Task.js
export const Task = ({ addTask }) => {
const [focusItem, setFocusItem] = useState(null);
return (
<View style={styles.titleContainer}>
<Text style={styles.title}>What would you like to focus on?</Text>
<View style={styles.container}>
<TextInput
style={{ flex: 1 }}
maxLength={50}
value={focusItem}
onSubmitEditing={()=>({ nativeEvent: { text } }) => setFocusItem(text)}
/>
<RoundedButton
style={styles.addSubject}
size={50}
title="+"
onPress={()=>addTask(focusItem)}
/>
</View>
</View>
);
};
App.js
import React, { useState } from 'react';
import { Text, View, StyleSheet } from 'react-native';
import Constants from 'expo-constants';
import {Task} from './src/features/task/Task'
export default function App() {
const [task, setTask] = useState(null);
return (
<View style={styles.container}>
{
task ?
(<Text></Text>):
(<Task addTask = {setTask}/>)
}
<Text>{task}</Text>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#425670',
},
});
I have tried to send the data from Task to App component by setting the value from Task. But onPress is not working.
I could see the text has been set successfully while executing the onSubmitEditing, but the onPress is doing nothing. Please help me fix this.
Thanks in advance

You need to change this
onSubmitEditing={()=>({ nativeEvent: { text } }) => setFocusItem(text)}
to
onSubmitEditing={({ nativeEvent: { text } }) => setFocusItem(text)}
You could also refer I want to update the parent according to the change of the child to react native

Related

Show or Hide element or Style element by using ref or nativeID

How can I use the refText to update the element 'Text'
const refText = null;
const doSomething = () =>{
refText.changeVisibility("hidden"); // something like that
}
return <Text ref={refText} onPress={doSomething}>Some Text</Text>;
I tried to find any way to work with it, but can't find any solution over google. Or maybe I missed.
setNativeProps may be what you're looking for, however this is generally not the recommended way to make updates to an element. Instead, consider using state and updating relevant props/styles of your component in response to that state change:
Example on Expo Snack
import { useState } from 'react';
import { Text, View, StyleSheet, Button } from 'react-native';
export default function App() {
const [visible, setVisible] = useState(true);
return (
<View style={styles.container}>
<Button title="Toggle" onPress={() => setVisible(previous => !previous)} />
{visible && (
<Text onPress={() => setVisible(false)} style={{padding: 20}}>Click this text to hide it</Text>
)}
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
},
});

How does onBlur event work in react native? it doesn't work i want it to

I made an expo app.
I want to make an AutoCompleteInput.
When focusing and changing TextInput, It will render the same words.
When ListItem clicks, TextInput's value will update it and it doesn't render.
When TextInput focus out, ListItem doesn't render.
In my code, the onPress event works first. onPress event works after.
how can i do?
and how does work onBlur event?
i moved onBlur event other component, but it doesn't work...
// App.js
...
return (
<View style={styles.container}>
<View style={styles.contentContainer}>
<Text>my content</Text>
</View>
<AutoInput />
<StatusBar style="auto" />
</View>
);
// AutoInput.jsx
import { ListItem, TextInput } from '#react-native-material/core';
import { useCallback, useState } from 'react';
import { ScrollView, StyleSheet, View } from 'react-native';
import { locations } from '../../utils/constants';
const initialLocation = locations.map(({ name }) => name);
const AutoInput = () => {
const [location, setLocation] = useState('');
const [searchedLocations, setSearchedLocations] = useState([]);
const handleChangeInputText = useCallback(
(newString) => {
setLocation(newString);
if (!newString) {
setSearchedLocations(initialLocation);
return;
}
const filteredLocations = locations
.filter(({ name }) => name.includes(newString))
.map(({ name }) => name);
setSearchedLocations(filteredLocations);
},
[initialLocation]
);
return (
<View style={styles.container}>
<TextInput
placeholder="지역을 검색해주세요"
onBlur={() => {
console.log('blur');
setSearchedLocations([]);
}}
onFocus={() => console.log('focus')}
onChangeText={handleChangeInputText}
value={location}
/>
<ScrollView style={styles.scroll}>
{searchedLocations.map((searchLocation) => (
<ListItem
key={searchLocation}
title={searchLocation}
onPress={() => alert(searchLocation)}
style={styles.listItem}
/>
))}
</ScrollView>
</View>
);
};
const styles = StyleSheet.create({
container: { position: 'absolute', width: '100%' },
scroll: { maxHeight: 300 },
listItem: { width: '100%' },
});
export default AutoInput;
enter image description here

How to execute onPress on TouchableOpacity react-native using jest and #testing-library/react-native?

I have a component called Header that look like this:
import React from 'react'
import {StyleSheet, TouchableOpacity, View, StyleProp, ViewStyle} from 'react-native'
import {Text} from '..'
import Icon from 'react-native-vector-icons/MaterialIcons'
import {theme} from '#app/presentations/utils/styles'
import {useNavigation} from '#react-navigation/core'
interface IHeaderProps {
title: string
headerRight?: () => JSX.Element | false | undefined
onGoBack?: () => void
hideBackButton?: boolean
style?: StyleProp<ViewStyle>
}
const Header: React.FC<IHeaderProps> = props => {
const navigation = useNavigation()
const goBack = () => {
props.onGoBack ? props.onGoBack : navigation.goBack()
}
return (
<View style={[styles.container, props.style]}>
<View style={styles.leftContent}>
{props?.hideBackButton ? null : (
<TouchableOpacity onPress={goBack} testID="headerBackButton">
<Icon name={'chevron-left'} size={22} color={theme.colors.black} />
</TouchableOpacity>
)}
</View>
<View style={{flex: 1, flexGrow: 10, alignItems: 'center'}}>
<Text maxLines={2} style={{paddingHorizontal: 8, textAlign: 'center'}} type="semibold">
{props.title}
</Text>
</View>
<View style={styles.rightContent}>{props.headerRight && props.headerRight()}</View>
</View>
)
}
export default Header
Focus on TouchableOpacity, I want to fire the onPress of it using testId, but looks like it won't fire.
it('Should have correct behavior', () => {
const goBackFn = jest.fn()
const props: IHeaderProps = {
title: 'My Header',
onGoBack: goBackFn,
}
const {component, getByTestId, queryAllByText} = renderComponent(props)
expect(component).toMatchSnapshot()
expect(queryAllByText('My Header').length).toBe(1)
expect(getByTestId('headerBackButton')).toBeTruthy()
fireEvent.press(getByTestId('headerBackButton'))
expect(goBackFn).toBeCalled()
})
The error message was like this
means that my goBack function never executed. I wondering why.
Then I check the snapshots of my Header component, it is not show TouchableOpacity but it shows View with onClick function on it
<View
accessible={true}
collapsable={false}
focusable={true}
nativeID="animatedComponent"
onClick={[Function]}
onResponderGrant={[Function]}
onResponderMove={[Function]}
onResponderRelease={[Function]}
onResponderTerminate={[Function]}
onResponderTerminationRequest={[Function]}
onStartShouldSetResponder={[Function]}
style={
Object {
"opacity": 1,
}
}
testID="headerBackButton"
>
My question is how do I execute onPress on TouchableOpacity ?
I fixed this. At least there is two problem from my implementation.
On the Header component, I forgot to add parenthesis () on props.onGoBack function. It should be props.onGoBack() not props.onGoBack
I need to add await waitFor(() => { ...wait for my getTestById to be truthy })

How to change state value in const mode?

I am a beginner in React-Native.
I tried to change the state value.
But it seems different with "class" mode. Now I am using "const" mode.
In const mode, how can I change the state value?
import React from "react";
import {
View,
Text,
Image,
TouchableOpacity
} from "react-native";
const Product = props => {
this.state = {
checkIconURL : require('../../assets/ic_check_circle.png')
}
set = () => {
this.setState({ checkIconURL : require('../../assets/empty.png') }) //But this lines gives err.
}
return (
<View>
<Text style={{ fontSize: 16}}>Everyday</Text>
<TouchableOpacity onPress = {this.set}>
<Image source = {this.state.checkIconURL} style={{width: 30, height: 30}} />
</TouchableOpacity>
</View>
)
}
state is not available in function components, this.state and this.setState() can only be used in class component, u have to use useState hook from react to use the state...
import React ,{ useState } from "react";
import {
View,
Text,
Image,
TouchableOpacity
} from "react-native";
const Product = props => {
const initialState = require('../../assets/ic_check_circle.png');
const [iconUrl, setIconUrl ] = useState(initialState);
const set = () => {
const emptyImageUrl = require('../../assets/empty.png')
setIconUrl(emptyImageUrl);
}
return (
<View>
<Text style={{ fontSize: 16}}>Everyday</Text>
<TouchableOpacity onPress = {set}>
<Image source = {iconUrl} style={{width:
30, height: 30}} />
</TouchableOpacity>
</View>
)
}
the following code is incorrect as you need to use Hook in a functional component to manage state.
React provides the useState hook to manage state in a functional component.
import React ,{ useState } from "react";
import {
View,
Text,
Image,
TouchableOpacity
} from "react-native";
const Product = props => {
const initialState = require('../../assets/ic_check_circle.png');
const [ state,setState ] = useState({checkIconURL: initialState});
set = () => {
const emptyImageUrl = require('../../assets/empty.png') });
setState({...state, checkIconURL: emptyImageUrl })
}
return (
<View>
<Text style={{ fontSize: 16}}>Everyday</Text>
<TouchableOpacity onPress = {this.set}>
<Image source = {this.state.checkIconURL} style={{width:
30, height: 30}} />
</TouchableOpacity>
</View>
)
}

React-Native: Setting focus to custom component built off an array

I am trying to create a list of custom inputs based on an array, and when pressing the the enter key, I'd like the focus to automatically move to the next custom input. I can get this to work with a regular <TextInput> react component using the ref and onSubmitEditing but I cannot get this to function properly using my custom component that wraps a <TextInput>
Here is my code, it consists of two files: App.js and TextInput2.js (I know that currently the last line will error because of the reference counter but if I can get it to work I'll address the last issue)
Working Snack
-- App.js --
import React from 'react';
import { StyleSheet, View, TextInput } from 'react-native';
import TextInput2 from './TextInput2'
export default class App extends React.Component {
constructor(){
super();
this.myRef = [];
this.state = {}
}
focusField = (key) => {
this.myRef[key].focus()
}
render() {
let textFields = ["one", "two", "three", "four", "five"];
return (
<View style={styles.container}>
{
textFields.map((x, i) => {
this.myRef[i] = React.createRef();
let k = i + 1
return(
<TextInput2
name={x}
key={i}
placeholder={x + " This Doesnt Work"}
ref={ref => this.myRef[i] = ref}
nextRef={this.myRef[k]}
//onSubmitEditing={() => this.focusField(k)}
//onSubmitEditing={() => this.myRef[k].focus()}
blurOnSubmit={false}
/>
)
})
}
{
textFields.map((x, i) => {
this.myRef[i] = React.createRef();
return(
<TextInput
name={x}
key={i}
placeholder="This works!"
ref={ref => this.myRef[i] = ref}
onSubmitEditing={() => this.focusField(i+1)}
blurOnSubmit={false}
/>
)
})
}
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
});
--TextInput2.js --
import React from 'react';
import { View, TextInput } from 'react-native';
export default class TextInput2 extends React.Component {
state={}
handleFocus = () => {}
handleBlur = () => {}
focus() {
this.props.nextRef.focus()
}
render() {
return (
<View >
<TextInput
{...this.props}
onFocus={this.handleFocus}
onBlur={this.handleBlur}
onSubmitEditing={() => this.focus()}
/>
</View>
)
}
}
I've read this post and this but cannot seem to determine how to setup the function to set focus on the next field.
I have edited the Snack. Please try this
I think you're making it complicated. Try to change like this,
this.myRef[index] = React.createRef()
CustomTextComponent component
<CustomTextComponent
name={Something}
key={index}
forwardRef={this.myRef[index]}
onSubmitEditing={() => this.myRef[index + 1].current.focus()}
/>
As you're using createRef() you have to call it's ref using the "current" object.
CustomComponent.js
import React from 'react';
import { View, TextInput } from 'react-native';
export default class CustomComponent extends React.Component {
render() {
return (
<View >
<TextInput
{...this.props}
returnKeyType={"next"}
ref={this.props.forwardRef}
onSubmitEditing={this.props.onSubmitEditing}
/>
</View>
)
}
}