Kavindu-Gayantha / lottie-react-native

Lottie wrapper for React Native.

Lottie for React Native, iOS, and Android

Lottie component for React Native (iOS and Android)

Lottie is a mobile library for Android and iOS that parses Adobe After Effects animations exported as JSON with bodymovin and renders them natively on mobile!

For the first time, designers can create and ship beautiful animations without an engineer painstakingly recreating it by hand.

Installing

Install lottie-react-native (latest) and lottie-ios (3.2.3):

yarn add lottie-react-native
yarn add lottie-ios@3.2.3

or

npm i --save lottie-react-native
npm i --save lottie-ios@3.2.3

Go to your ios folder and run:

pod install

_ IMPORTANT _

If you have issues linking your iOS project check out this StackOverflow thread on how to fix it.

If your app crashes on Android, means auto linking didn't work. You will need to make the following changes:

android/app/src/main/java/<AppName>/MainApplication.java

• add import com.airbnb.android.react.lottie.LottiePackage; on the imports section
• add packages.add(new LottiePackage()); in List<ReactPackage> getPackages();

android/app/build.gradle

add implementation project(':lottie-react-native') in the dependencies block

android/settings.gradle

add:

include ':lottie-react-native'
project(':lottie-react-native').projectDir = new File(rootProject.projectDir, '../node_modules/lottie-react-native/src/android')

_ IMPORTANT _ Not all After Effects features are supported by Lottie. If you notice there are some layers or animations missing check this list to ensure they are supported.

Usage

(If you are using TypeScript, please read this first)

LottieView can be used in a declarative way:

import React from 'react';
import LottieView from 'lottie-react-native';

export default class BasicExample extends React.Component {
  render() {
    return <LottieView source={require('./animation.json')} autoPlay loop />;
  }
}

Additionally, there is an imperative API which is sometimes simpler.

import React from 'react';
import LottieView from 'lottie-react-native';

export default class BasicExample extends React.Component {
  componentDidMount() {
    this.animation.play();
    // Or set a specific startFrame and endFrame with:
    this.animation.play(30, 120);
  }

  render() {
    return (
      <LottieView
        ref={animation => {
          this.animation = animation;
        }}
        source={require('../path/to/animation.json')}
      />
    );
  }
}

Lottie's animation progress can be controlled with an Animated value:

import React from 'react';
import { Animated, Easing } from 'react-native';
import LottieView from 'lottie-react-native';

export default class BasicExample extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      progress: new Animated.Value(0),
    };
  }

  componentDidMount() {
    Animated.timing(this.state.progress, {
      toValue: 1,
      duration: 5000,
      easing: Easing.linear,
    }).start();
  }

  render() {
    return (
      <LottieView source={require('../path/to/animation.json')} progress={this.state.progress} />
    );
  }
}

Changing color of layers:

import React from 'react';
import LottieView from 'lottie-react-native';

export default class BasicExample extends React.Component {
  render() {
    return (
      <LottieView
        source={require('../path/to/animation.json')}
        colorFilters={[
          {
            keypath: 'button',
            color: '#F00000',
          },
          {
            keypath: 'Sending Loader',
            color: '#F00000',
          },
        ]}
        autoPlay
        loop
      />
    );
  }
}

API

You can find the full list of props and methods available in our API document. These are the most common ones:

Prop	Description	Default
source	Mandatory - The source of animation. Can be referenced as a local asset by a string, or remotely with an object with a uri property, or it can be an actual JS object of an animation, obtained (for example) with something like require('../path/to/animation.json').	None
style	Style attributes for the view, as expected in a standard View.	The aspectRatio exported by Bodymovin will be set. Also the width if you haven't provided a width or height
loop	A boolean flag indicating whether or not the animation should loop.	true
autoPlay	A boolean flag indicating whether or not the animation should start automatically when mounted. This only affects the imperative API.	false
colorFilters	An Array of layers you want to change the color filter.	[]

More...

More

View more documentation, FAQ, help, examples, and more at airbnb.io/lottie