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lottie-miniapp

v1.9.1

Published

Lottie 小程序版 [LottieWeb](https://github.com/airbnb/lottie-web)

Downloads

1,716

Readme

Lottie for Miniapp

Lottie 小程序版 LottieWeb

说明

小程序版主要依据 LottieWeb 改写,意在解决需要在小程序上播放 lottie 动画,因为工作需要所以写了这库考虑可能大家有这个需求所以开源出来。

目前支持工作上碰到一些简单的 lottie 动画,对于一些复杂动画可能会出现问题,故欢迎提交 issue 并提供对应的动画 json 以供复现,并在有时间精力的情况下会一一修复(由于小程序和 web 的 canvas 实现会有一定的差异导致某些功能无法实现),也欢迎大家提交 pr。

使用

安装

  npm i -S lottie-miniapp

使用

// 指定canvas-id 及 id 需一样
<canvas id="test-canvas" canvas-id="test-canvas"></canvas>
import lottie from "lottie-miniapp";

const canvasContext = wx.createCanvasContext("test-canvas");
//  请求到的lottie json数据
const animationData = {};
// 请求lottie的路径。注意开启downloadFile域名并且返回格式是json
const animationPath = "https://xxxxx";

// 指定canvas大小
canvasContext.canvas = {
  width: 100,
  height: 100,
};

// 如果同时指定 animationData 和 path, 优先取 animationData
lottie.loadAnimation({
  renderer: "canvas", // 只支持canvas
  loop: true,
  autoplay: true,
  animationData: animationData,
  path: animationPath,
  rendererSettings: {
    context: canvasContext,
    clearCanvas: true,
  },
});

Component

(v1.4.0)增加小程序自定义组件

使用

使用小程序自带 npm 安装组件包

{
  "usingComponents": {
    "lottie": "lottie-miniapp/component/lottie"
  }
}
<lottie id="lottie" path="https://xxxxx" width="300" height="300"/>

参数

| 参数名 | 描述 | 默认值 | | ------------- | ----------------------------------------------------------------- | ------ | | width | 指定显示宽度 | 100 | | height | 指定显示高度 | 100 | | path | 请求 lottie 的路径。注意开启 downloadFile 域名并且返回格式是 json | null | | animationData | 请求到的 lottie 的 json 数据 | null | | loop | 循环播放 | true | | autoplay | 自动播放 | true |

注意

  • canvas 默认样式宽高 100%,需要一个 container 指定宽高
  • 如果想要获取lottie的实例
Page({
  getLottie() {
    const lottieComponent = this.selectComponent("#lottie");
    // here!
    console.log(lottieComponent.lottie);
  },
});

[email protected]

[email protected] 起支持 <canvas type=2d />。初始化和原来有区别。

** 但是目前不推荐使用,可能会碰到许多问题。 **

使用方式

参考官方示例 https://developers.weixin.qq.com/miniprogram/dev/component/canvas.html

  <!-- canvas.wxml -->
  <canvas type="2d" id="myCanvas"></canvas>
// canvas.js
import lottie from "lottie-miniapp";
Page({
  onReady() {
    const query = wx.createSelectorQuery();
    query
      .select("#myCanvas")
      .fields({ node: true, size: true })
      .exec((res) => {
        const canvas = res[0].node;
        const ctx = canvas.getContext("2d");

        const dpr = wx.getSystemInfoSync().pixelRatio;
        canvas.width = res[0].width * dpr;
        canvas.height = res[0].height * dpr;
        ctx.scale(dpr, dpr);

        lottie.loadAnimation({
          renderer: "canvas", // 只支持canvas
          loop: true,
          autoplay: true,
          animationData: animationData,
          path: animationPath,
          rendererSettings: {
            // 这里需要填 canvas
            canvas: canvas,
            context: canvasContext,
            clearCanvas: true,
          },
        });
      });
  },
});

调试

yarn run build:debug --watch // 编译文件到example