React Native Touchables

Touchable components provide the capability to capture the tapping functionality. The touchables component can be implemented as an alternative of basic button, if they are not look right for your app. Using these components, you build your own button. Tapping on these components, you can display the feedback.

The touchables components do not provide any default styling, so you will need to do your style for presenting nicely in the app.

Types of Touchable Components

There are four touchable components provided by React Native. Selection of this component depends on the kind of feedback you want to provide:

• TouchableHighlight
• TouchableNativeFeedback
• TouchableOpacity
• TouchableWithoutFeedback.

React Native TouchableHighlight

The TouchableHighlight can be used where you would use a button or link on the web. The background of this component becomes dark on pressing it.

Props

Props	Type	Required	Platform	Description
activeOpacity	number	no		Determines the opacity of wrapped view when it is touched.
onHideUnderlay	function	no		Calls instantly after the underlay is hidden.
onShowUnderlay	function	no		Calls instantly after the underlay is shown.
style	View.style	no
underlayColor	color	no		Show the underlay color when the touch is active.
hasTVPreferredFocus	bool	no	iOS	It focuses TV preferred, work only for iOS.
tvParallaxProperties	object	no	iOS	It is an object with properties which control the Apple TV parallax effects.

React Native TouchableNativeFeedback

The TouchableNativeFeedback makes a view to response properly on touch. This component works only for Android operating system. It uses native state drawable to display the touch feedback.

It supports only a single View instance as a child node. It is implemented by replacing the View with another instance of RCTView node.

Props

Props	Type	Required	Description
background	backgroundPropType	no	It determines the background drawable that is going to be displayed as feedback.
useForeground	bool	no	It adds the ripple effect to the foreground of the view, instead of the background.

React Native TouchableOpacity

The TouchableOpacity wrapper is used to reduce the opacity of button. It allows background to be seen while the user press down. The opacity of button will be controlled by wrapping the children in an Animation.

Props

Props	Type	Required	Platform	Description
activeOpacity	number	no		It determines the opacity of wrapped view when it is touched.
tvParallaxProperties	object	no	iOS	It is an object with property which is used to control the Apple TV parallax effects.
hasTVPreferredFocus	bool	no	iOS	It focuses TV preferred, it works on Apple TV only.

Methods

Method	Description
setOpacityTo()	It animates the touchable to a new opacity.

React Native TouchableWithoutFeedback

The TouchableWithoutFeedback is used when the user wants to handle the tap functionality but doesn't want to display any feedback.

Props

Props	Type	Required	Description
hitSlop	object	no	This defines how far your touch can start away from the button.
onAccessibilityTap	function	no	If accessible is set to true, the system invokes this function when the user performs accessibility tap gesture.
accessibilityHint	string	no	It helps user to understand what will happen when they perform an action on the accessibility element.
accessibilityLabel	node	no	It overrides the text, which is read by the screen reader when users interact with the element.
delayLongPress	number	no	It delays the onLongPress in milli-second calling onPressIn.

Some time user presses a view and holds it for the set of time. This long press is handled by the function using onLongPress props of any of the above "Touchable" components.

React Native Touchables Example

1. import React, { Component } from 'react';  
2. import { Alert,Platform,StyleSheet,Text,TouchableHighlight,TouchableOpacity,  
3.     TouchableNativeFeedback,TouchableWithoutFeedback, View } from 'react-native';  
4.   
5. export default class Touchables extends Component {  
6.     _onPressButton() {  
7.         Alert.alert('You tapped the button!')  
8.     }  
9.   
10.     _onLongPressButton() {  
11.         Alert.alert('You long-pressed the button!')  
12.     }  
13.   
14.   
15.     render() {  
16.         return (  
17.             <View style={styles.container}>  
18.                 <TouchableHighlight onPress={this._onPressButton} underlayColor="white">  
19.                     <View style={styles.button}>  
20.                         <Text style={styles.buttonText}>TouchableHighlight</Text>  
21.                     </View>  
22.                 </TouchableHighlight>  
23.                 <TouchableOpacity onPress={this._onPressButton}>  
24.                     <View style={styles.button}>  
25.                         <Text style={styles.buttonText}>TouchableOpacity</Text>  
26.                     </View>  
27.                 </TouchableOpacity>  
28.                 <TouchableNativeFeedback  
29.                     onPress={this._onPressButton}  
30.                     background={Platform.OS === 'android' ? TouchableNativeFeedback.SelectableBackground() : ''}>  
31.                     <View style={styles.button}>  
32.                         <Text style={styles.buttonText}>TouchableNativeFeedback</Text>  
33.                     </View>  
34.                 </TouchableNativeFeedback>  
35.                 <TouchableWithoutFeedback  
36.                     onPress={this._onPressButton}  
37.                 >  
38.                     <View style={styles.button}>  
39.                         <Text style={styles.buttonText}>TouchableWithoutFeedback</Text>  
40.                     </View>  
41.                 </TouchableWithoutFeedback>  
42.                 <TouchableHighlight onPress={this._onPressButton} onLongPress={this._onLongPressButton} underlayColor="white">  
43.                     <View style={styles.button}>  
44.                         <Text style={styles.buttonText}>Touchable with Long Press</Text>  
45.                     </View>  
46.                 </TouchableHighlight>  
47.             </View>  
48.         );  
49.     }  
50. }  
51.   
52. const styles = StyleSheet.create({  
53.     container: {  
54.         paddingTop: 60,  
55.         alignItems: 'center'  
56.     },  
57.     button: {  
58.         marginBottom: 30,  
59.         width: 260,  
60.         alignItems: 'center',  
61.         backgroundColor: '#5ead97'  
62.     },  
63.     buttonText: {  
64.         padding: 20,  
65.         color: 'white',  
66.         fontSize: 18  
67.     }  
68. });  

Output: