Unity2020.3 Webgl 与 Js交互

最新推荐文章于 2025-02-24 19:27:01 发布

m_dlwlrma

最新推荐文章于 2025-02-24 19:27:01 发布

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分类专栏： Unity 文章标签： javascript 交互开发语言

本文链接：https://blog.youkuaiyun.com/qq_42862278/article/details/124981387

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本文介绍了一种针对Unity 2020版本的特殊打包方法，通过创建特定的JSLib文件和脚本来实现在WebGL中调用原生浏览器功能。

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参考很多网上的方法，我发现2020版本和2020之前版本打包后的index.html文件简直天差地别，大多数按照网上的方法在2020版本上是无法实现的，所以我结合了网上的方法进行了改进：

新建一个txt文本，改名为__Internal更改文件格式为jslib,此文件必须放在Plugins文件夹下（没有此文件夹自己创建一个即可）。内容如下：

mergeInto(LibraryManager.library, {
  SayHello:function(){
  window.alert("Hello World!");
  },
  ReportReady:function(){
  window.ReportReady();
  }
});

创建一个脚本，脚本名称随意（我这里暂定为Script）；创建一个脚本，名称随意，将创建好的脚本挂载在Scripts节点上，脚本内容如下：

using System.Runtime.InteropServices;
using UnityEngine;
using UnityEngine.UI;

public class WebglOpenUrlTest : MonoBehaviour
{
    public Text _Text;
    
    [DllImport("__Internal")]
    private static extern void SayHello();

    [DllImport("__Internal")]
    private static extern void ReportReady();

    private void Start()
    {
        ReportReady();
    }

    private void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            SayHello();
        }
    }

    public void GetInfo(string s)
    {
        _Text.text = s;
    }
}

3.打Webgl包，打包完成后找到index.html文件，修改html文件，这里是我的html文件：

<!DOCTYPE html>
<html lang="en-us">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    <title>Webgl</title>
    <link rel="shortcut icon" href="TemplateData/favicon.ico">
    <link rel="stylesheet" href="TemplateData/style.css">
  </head>
  <body class="dark">
    <div id="unity-container" class="unity-desktop">
      <canvas id="unity-canvas"></canvas>
    </div>
    <div id="loading-cover" style="display:none;">
      <div id="unity-loading-bar">
        <div id="unity-logo"><img src="logo.png"></div>
        <div id="unity-progress-bar-empty" style="display: none;">
          <div id="unity-progress-bar-full"></div>
        </div>
        <div class="spinner"></div>
      </div>
    </div>
    <div id="unity-fullscreen-button" style="display: none;"></div>
    <script>
      const hideFullScreenButton = "";
      const buildUrl = "Build";
      const loaderUrl = buildUrl + "/TTT.loader.js";
      const config = {
        dataUrl: buildUrl + "/TTT.data",
        frameworkUrl: buildUrl + "/TTT.framework.js",
        codeUrl: buildUrl + "/TTT.wasm",
        streamingAssetsUrl: "StreamingAssets",
        companyName: "DefaultCompany",
        productName: "Webgl",
        productVersion: "0.1",
      };

      const container = document.querySelector("#unity-container");
      const canvas = document.querySelector("#unity-canvas");
      const loadingCover = document.querySelector("#loading-cover");
      const progressBarEmpty = document.querySelector("#unity-progress-bar-empty");
      const progressBarFull = document.querySelector("#unity-progress-bar-full");
      const fullscreenButton = document.querySelector("#unity-fullscreen-button");
      const spinner = document.querySelector('.spinner');

      const canFullscreen = (function() {
        for (const key of [
            'exitFullscreen',
            'webkitExitFullscreen',
            'webkitCancelFullScreen',
            'mozCancelFullScreen',
            'msExitFullscreen',
          ]) {
          if (key in document) {
            return true;
          }
        }
        return false;
      }());

      if (/iPhone|iPad|iPod|Android/i.test(navigator.userAgent)) {
        container.className = "unity-mobile";
        config.devicePixelRatio = 1;
      }
      loadingCover.style.display = "";

      const script = document.createElement("script");
      script.src = loaderUrl;
     //全局
     const gameInstance=null ;

      script.onload = () => {
        createUnityInstance(canvas, config, (progress) => {
          spinner.style.display = "none";
          progressBarEmpty.style.display = "";
          progressBarFull.style.width = `${100 * progress}%`;
        }).then((unityInstance) => {
          
          loadingCover.style.display = "none";
          if (canFullscreen) {
            if (!hideFullScreenButton) {
              fullscreenButton.style.display = "";
            }
            fullscreenButton.onclick = () => {
              unityInstance.SetFullscreen(1);
            };
          }
            this.gameInstance=unityInstance;

        }).catch((message) => {
          alert(message);
        });
      };

      window.ReportReady=function(x,y){
        window.top.dispatchEvent(new CustomEvent(x,{detail:y}))
        send({id:1,value:2})
      }
      function send(obj){
         this.gameInstance.SendMessage('Scripts','GetInfo',JSON.stringify(obj))
      }

      document.body.appendChild(script);
    </script>
  </body>
</html>