Create Custom Shapes Like Square, Circle, Triangle, Rectangle, Oval in React Native

React Native Custom Shapes

This is an Example to Create Custom Shapes Like Square, Circle, Triangle, Rectangle, Oval in React Native. In this example, we will see how to make custom Shapes in React Native. This example will give you an idea about the basic shapes and will help you if you are making some basic 2D game or some other stuff which needs to have different shapes. So Let’s get started.

We are going to use StyleSheet to make different shapes and will set a different style on a view using different states.

Type of different shapes

Here are the style sheets for the different views:

Circle

CircleShapeView: {
  //To make Circle Shape
  width: 150,
  height: 150,
  borderRadius: 150 / 2,
  backgroundColor: '#FF00FF',
},

Oval

OvalShapeView: {
  //To make Oval Shape
  marginTop: 20,
  width: 100,
  height: 100,
  backgroundColor: '#ED2525',
  borderRadius: 50,
  transform: [{ scaleX: 2 }],
},

Square

SquareShapeView: {
  //To make Square Shape
  width: 100,
  height: 100,
  backgroundColor: '#14ff5f',
},

Rectangle

RectangleShapeView: {
  //To make Rectangle Shape
  marginTop: 20,
  width: 120 * 2,
  height: 120,
  backgroundColor: '#14ff5f',
},

Triangle

TriangleShapeView: {
  //To make Triangle Shape
  width: 0,
  height: 0,
  borderLeftWidth: 60,
  borderRightWidth: 60,
  borderBottomWidth: 120,
  borderStyle: 'solid',
  backgroundColor: 'transparent',
  borderLeftColor: 'transparent',
  borderRightColor: 'transparent',
  borderBottomColor: '#606070',
},

Let’s jump into the code to make different shapes.

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 command line interface to make our React Native App.

If you have previously installed a global react-native-cli package, please remove it as it may cause unexpected issues:

npm uninstall -g react-native-cli @react-native-community/cli

Run the following commands to create a new React Native project

npx react-native init ProjectName

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

npx react-native init ProjectName --version X.XX.X

Note If the above command is failing, you may have old version of react-native or react-native-cli installed globally on your pc. Try uninstalling the cli and run the cli using npx.

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

Code

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

App.js

//Create Custom Shapes
//Square, Circle, Triangle, Rectangle, Oval in React Native
//https://aboutreact.com/
//react-native-create-custom-shapes-like-squarecircle-triangle-rectangle-oval/

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

//import all the components we are going to use
import {
  SafeAreaView,
  StyleSheet,
  View,
  Text,
  TouchableOpacity,
} from 'react-native';

const App = () => {
  const [showSquare, setShowSquare] = useState(false);
  const [showCircle, setShowCircle] = useState(false);
  const [showTriangle, setShowTriangle] = useState(false);
  const [showRectangle, setShowRectangle] = useState(false);
  const [showOval, setShowOval] = useState(false);

  const changeShape = (shape) => {
    setShowSquare(shape == 'Square');
    setShowCircle(shape == 'Circle');
    setShowTriangle(shape == 'Triangle');
    setShowRectangle(shape == 'Rectangle');
    setShowOval(shape == 'Oval');
  };

  return (
    <SafeAreaView style={{flex: 1}}>
      <View style={styles.container}>
        <View
          style={
            showSquare
              ? styles.SquareShapeView
              : showCircle
              ? styles.CircleShapeView
              : showRectangle
              ? styles.RectangleShapeView
              : showTriangle
              ? styles.TriangleShapeView
              : showOval
              ? styles.OvalShapeView
              : ''
          }
        />
        <TouchableOpacity
          onPress={() => changeShape('Square')}
          active={0.8}>
          <Text style={{marginTop: 20, fontSize: 20}}>
            Square
          </Text>
        </TouchableOpacity>
        <TouchableOpacity
          onPress={() => changeShape('Circle')} 
          active={0.8}>
          <Text style={{marginTop: 20, fontSize: 20}}>
            Circle
          </Text>
        </TouchableOpacity>
        <TouchableOpacity
          onPress={() => changeShape('Triangle')}
          active={0.8}>
          <Text style={{marginTop: 20, fontSize: 20}}>
            Triangle
          </Text>
        </TouchableOpacity>
        <TouchableOpacity
          onPress={() => changeShape('Rectangle')}
          active={0.8}>
          <Text style={{marginTop: 20, fontSize: 20}}>
            Rectangle
          </Text>
        </TouchableOpacity>
        <TouchableOpacity
          onPress={() => changeShape('Oval')}
          active={0.8}>
          <Text style={{marginTop: 20, fontSize: 20}}>
            Oval
          </Text>
        </TouchableOpacity>
      </View>
    </SafeAreaView>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
  CircleShapeView: {
    //To make Circle Shape
    width: 150,
    height: 150,
    borderRadius: 150 / 2,
    backgroundColor: '#FF00FF',
  },
  OvalShapeView: {
    //To make Oval Shape
    marginTop: 20,
    width: 100,
    height: 100,
    backgroundColor: '#ED2525',
    borderRadius: 50,
    transform: [{scaleX: 2}],
  },
  SquareShapeView: {
    //To make Square Shape
    width: 100,
    height: 100,
    backgroundColor: '#14ff5f',
  },
  RectangleShapeView: {
    //To make Rectangle Shape
    marginTop: 20,
    width: 120 * 2,
    height: 120,
    backgroundColor: '#14ff5f',
  },
  TriangleShapeView: {
    //To make Triangle Shape
    width: 0,
    height: 0,
    borderLeftWidth: 60,
    borderRightWidth: 60,
    borderBottomWidth: 120,
    borderStyle: 'solid',
    backgroundColor: 'transparent',
    borderLeftColor: 'transparent',
    borderRightColor: 'transparent',
    borderBottomColor: '#606070',
  },
});
export default App;

To Run the React Native App

Open the terminal again and jump into your project using.

cd ProjectName

1. Start Metro Bundler

First, you will need to start Metro, the JavaScript bundler that ships with React Native. To start Metro bundler run following command

npx react-native start

Once you start Metro Bundler it will run forever on your terminal until you close it. Let Metro Bundler run in its own terminal. Open a new terminal and run the application.

2. Start React Native Application

To run the project on an Android Virtual Device or on real debugging device

npx react-native run-android

or on the iOS Simulator by running (macOS only)

npx react-native run-ios

Download Source Code

Output Screenshots

           
     

Output in Online Emulator

This is how you can create custom shapes like Square, Circle, Triangle, Rectangle, Oval. If you have any doubts or you want to share something about the topic you can comment below or contact us here. There will be more posts coming soon. Stay tuned!

Hope you liked it. 🙂

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