React Native Slider | Track bar in React Native

React Native Slider

This is an Example to Show the Working of Slider in React Native. React Native Slider is a component to select a single value from a range of values. We have mostly seen slider while increasing or decreasing the volume or brightness of our phone. Here is the example of the slider which will be helpful for you to integrate slider in your app.

Under the Lean Core Project Slider has been moved to its new home @react-native-community/slider after the launch of React Native 0.59. If you are using React Native >= 0.59 then please follow the instruction for React Native >= 0.59.

To Import Slider in Code

import Slider from '@react-native-community/slider'

Render Using

<Slider 
    maximumValue={100}
    minimumValue={0}
    step={1}
    value='initial value'
/>

To Make a React Native App

Getting started with React Native will help you to know more about the way you can make a React Native project. We are going to use react-native init to make our React Native App. Assuming that you have node installed, you can use npm to install the react-native-cli command line utility. Open the terminal and go to the workspace and run

npm install -g react-native-cli

Run the following commands to create a new React Native project

react-native init ProjectName

If you want to start a new project with a specific React Native version, you can use the --version argument:

react-native init ProjectName --version X.XX.X
react-native init ProjectName --version react-native@next

This will make a project structure with an index file named App.js in your project directory.

Installation of Dependency

To use Slider we need to install @react-native-community/slider dependency. To install this open the terminal and jump into your project using

cd ProjectName

Run the following command to install

npm install @react-native-community/slider --save

This command will copy all the dependency into your node_module directory. –save is optional, it is just to update the @react-native-community/slider dependency in your package.json file.

CocoaPods Installation

After the updation of React Native 0.60, they have introduced autolinking so we do not require to link the library but need to install pods. So to install pods use

cd ios && pod install && cd ..

Code

Open App.js in any code editor and replace the code with the following code

App.js

//This is an example code to understand Slider// 

import React, { Component } from 'react';
//import react in our code. 

//For React Native >= 0.59
import Slider from '@react-native-community/slider'

import { View, Text, StyleSheet } from 'react-native';

export default class App extends Component {
   constructor(props) {
   super(props);
   this.state = {
     //Initial Value of slider
     sliderValue: 15
   };
 }

  render() {
    return (
      <View style={styles.container}>
        {/*Text to show slider value*/}
        <Text style={{color: 'black'}}>Value of slider is : {this.state.sliderValue}</Text>
      
        {/*Slider with max, min, step and initial value*/}
        <Slider 
          maximumValue={100}
          minimumValue={0}
          minimumTrackTintColor="#307ecc"
          maximumTrackTintColor="#000000"
          step={1} 
          value={this.state.sliderValue}
          onValueChange={(sliderValue) => this.setState({ sliderValue })}
        />
      
      </View>
    );
  }
}
const styles = StyleSheet.create({
 container: {
   flex: 1,
   padding:20,
   justifyContent: 'center',
   backgroundColor: '#ecf0f1',
 }
});

To Run the React Native App

Open the terminal again and jump into your project using.
cd ProjectName
To run the project on an Android Virtual Device or on real debugging device
react-native run-android
or on the iOS Simulator by running
react-native run-ios (macOS only).

Output Screenshot

Output in Online Emulator

That was the example to show the working of Slider in React Native. If you have any doubts or you want to share something about the topic you can comment below or contact us here. The remaining components will be covered in the next article. Stay tuned!

Hope you liked it. 🙂


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3 thoughts on “React Native Slider | Track bar in React Native”

  1. I follow your code, and I have eror in emulator like this:
    Invariant Violation: requireNativeComponent.
    ‘RNCSlider’ was not found in the UIManager

    what the solution please..

    Reply

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