Linear Gradient Component in React Native

Linear Gradient Component in React Native

This is an Example of Linear Gradient Component in React Native. For those who have no idea about Gradient, A Gradients let you display smooth transitions between two or more specified colors. The gradient can be of two types:

  • Linear Gradients (goes down/up/left/right/diagonally)
  • Radial Gradients (defined by their center)

In this example, we will see the Linear Gradient. To Make a Linear Gradient in React Native we will use LinearGradient component from @react-native-community/react-native-linear-gradient provided by react-native-community. This is very useful if you want to make a custom button with a curve effect or any multi-color background.

In this example, we will make three buttons (Note: It is not only for the buttons you can use gradient in any view) with three types of gradient background:

  1. Simple Linear Gradient.
  2. Horizontal Gradient.
  3. Location Gradient.

Simple Gradient

Horizontal Gradient

Location Gradient

Here are some additional props for knowledge:

  1. colors: An array of at least two color values that represent gradient colors. Example: [‘red’, ‘blue’] sets gradient from red to blue.
  2. start: An optional object of the following type: { x: number, y: number }. Coordinates declare the position that the gradient starts at, as a fraction of the overall size of the gradient, starting from the top left corner. Example: { x: 0.1, y: 0.1 } means that the gradient will start 10% from the top and 10% from the left.
  3. end: Same as the start, but for the end of the gradient.
  4. locations: An optional array of numbers defining the location of each gradient color stop, mapping to the color with the same index in colors prop. Example: [0.1, 0.75, 1] means that first color will take 0% – 10%, second color will take 10% – 75% and finally third color will occupy 75% – 100%.

I think this is enough for now let’s get started with the example.

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 LinearGradient we need to install react-native-linear-gradient dependency.

To install this open the terminal and jump into your project using

Run the following command to install

This command will copy all the dependency into your node_module directory. –save is optional, it is just to update the react-native-linear-gradient dependancy 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

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

App.js

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).

Case:

If you’re having trouble, you can point your package.json at GitHub to see if the issue has been fixed. Simply change the dependency

to get the data right from GitHub instead of npm and then npm install.

IOS

Android

This is how you can use Linear Gradient Component in React Native. If you have any doubt 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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