cocos creator 升级到3.x之后加载进度条取消了，测试了多个3.x版本最终以creator 3.6.3版本，构建了简单的进度加载
参考链接：
https://forum.cocos.org/t/topic/137113
打包web-mobile后，没有进度条。加载的时候只显示一个黑屏。 - Creator 3.x - Cocos中文社区
cocos creator 3.6.x 版本H5下 启动页做进度条加载 - 掘金
参考了多个实例，大部分之解决到了第一个场景的加载进度，但creater 中cc.js加载时还是会留下空白时间，所以做了个伪进度条，让进度更平滑
主要对以下文件修改
设计思路：添加个计时函数，让进度每秒都长，确保每个时间都在增长，然后在一些关键点，插入手动更新，让进度更真实平滑
//------------------中间是新增加内容-----------------------
//-------------------end-----------------
1、 style.css中添加进度条及logo的布局
html {
-ms-touch-action: none;
}
body, canvas, div {
display: block;
outline: none;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
user-select: none;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
-khtml-user-select: none;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
/* Remove spin of input type number */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
/* display: none; <- Crashes Chrome on hover */
-webkit-appearance: none;
margin: 0; /* <-- Apparently some margin are still there even though it's hidden */
}
body {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
padding: 0;
border: 0;
margin: 0;
cursor: default;
color: #888;
background-color: #333;
text-align: center;
font-family: Helvetica, Verdana, Arial, sans-serif;
display: flex;
flex-direction: column;
}
canvas {
background-color: rgba(0, 0, 0, 0);
}
#GameDiv, #Cocos3dGameContainer, #GameCanvas {
width: 100%;
height: 100%;
}
/******************以下 进度条和logo **********/
.progress-bar {
background-color: #1a1a1a;
position: absolute;
left: 25%;
top: 80%;
height: 14px;
padding: 5px;
width: 50%;
/*margin: 0 -175px; */
border-radius: 5px;
box-shadow: 0 1px 5px #000 inset, 0 1px 0 #444;
}
.progress-bar span {
display: block;
height: 100%;
border-radius: 3px;
box-shadow: 0 1px 0 rgba(255, 255, 255, .5) inset;
transition: width .4s ease-in-out;
background-color: #34c2e3;
}
.stripes span {
background-size: 30px 30px;
background-image: linear-gradient(135deg, rgba(255, 255, 255, .15) 25%, transparent 25%,
transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%,
transparent 75%, transparent);
animation: animate-stripes 1s linear infinite;
}
#splash {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: #171717 url(./splash.png) no-repeat center;
background-size: 45%;
}
/******************end**********/2、 index.html中添加节点，并且启动显示
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Cocos Creator | spider</title>
<!--http://www.html5rocks.com/en/mobile/mobifying/-->
<meta name="viewport"
content="width=device-width,user-scalable=no,initial-scale=1,minimum-scale=1,maximum-scale=1,minimal-ui=true"/>
<!--https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariHTMLRef/Articles/MetaTags.html-->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="format-detection" content="telephone=no">
<!-- force webkit on 360 -->
<meta name="renderer" content="webkit"/>
<meta name="force-rendering" content="webkit"/>
<!-- force edge on IE -->
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
<meta name="msapplication-tap-highlight" content="no">
<!-- force full screen on some browser -->
<meta name="full-screen" content="yes"/>
<meta name="x5-fullscreen" content="true"/>
<meta name="360-fullscreen" content="true"/>
<!--fix fireball/issues/3568 -->
<!--<meta name="browsermode" content="application">-->
<meta name="x5-page-mode" content="app">
<!--<link rel="apple-touch-icon" href=".png" />-->
<!--<link rel="apple-touch-icon-precomposed" href=".png" />-->
<link rel="stylesheet" type="text/css" href="style.css"/>
</head>
<body>
<div id="GameDiv" cc_exact_fit_screen="true">
<div id="Cocos3dGameContainer">
<canvas id="GameCanvas" oncontextmenu="event.preventDefault()" tabindex="99"></canvas>
</div>
</div>
<!--------------添加节点 -------------->
<div id="splash">
<div class="progress-bar stripes">
<span style="width: 0%"></span>
</div>
</div>
<!-----------------end--------------->
<!-- Polyfills bundle. -->
<script src="src/polyfills.bundle.js" charset="utf-8"> </script>
<!-- SystemJS support. -->
<script src="src/system.bundle.js" charset="utf-8"> </script>
<!-- Import map -->
<script src="src/import-map.json" type="systemjs-importmap" charset="utf-8"> </script>
<script>
System.import('./index.js').catch(function(err) { console.error(err); })
</script>
<!--------------启动显示进度 -------------->
<script type="text/javascript">
(function () {
var splash = document.getElementById('splash');
splash.style.display = 'block';
})();
</script>
<!--------------end -------------->
</body>
</html>
3、 添加进度条更新onProgress，和自动一个计时更新函数，onProgress手动调用分的越细节，进度曲线越平滑
System.register([], function (_export, _context) {
"use strict";
var cc, Application;
//---------------计时函数 和更新进度函数--------------
var percentJd=0;
//每秒更新进度条
var timer =setInterval(() => {
const now = new Date();
//console.log(now.toString());
if (percentJd<90) {
percentJd=percentJd+1;
onProgress(percentJd);
} else{
clearInterval(timer);
}
}, 1000);
//刷新ui 及进度
function onProgress(percent){
//用于手动跟新，比每秒进度大就更新
if (percent>percentJd) {
percentJd=percent;
}
var progressBar = splash.querySelector('.progress-bar span');
// var percent = 100 * finish / total;
if (progressBar) {
progressBar.style.width = percent + '%';
}
}
//---------------------------end-----------------
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
return {
setters: [],
execute: function () {
_export("Application", Application = /*#__PURE__*/function () {
function Application() {
_classCallCheck(this, Application);
this.settingsPath = 'src/settings.json';
this.showFPS = false;
}
_createClass(Application, [{
key: "init",
value: function init(engine) {
cc = engine;
cc.game.onPostBaseInitDelegate.add(this.onPostInitBase.bind(this));
cc.game.onPostSubsystemInitDelegate.add(this.onPostSystemInit.bind(this));
}
}, {
key: "onPostInitBase",
value: function onPostInitBase() {// cc.settings.overrideSettings('assets', 'server', '');
// do custom logic
}
}, {
key: "onPostSystemInit",
value: function onPostSystemInit() {// do custom logic
}
}, {
key: "start",
value: function start() {、
//---------------手动更新进度条--------------
//上面的其他函数中可以拆分更细致
onProgress(50);，
//game.init，初始化第一个场景，第一个场景比较大的话也会比较耗时，所以定在50%
//----------------------------------------
return cc.game.init({
debugMode: false ? cc.DebugMode.INFO : cc.DebugMode.ERROR,
settingsPath: this.settingsPath,
overrideSettings: {
// assets: {
// preloadBundles: [{ bundle: 'main', version: 'xxx' }],
// }
profiling: {
showFPS: this.showFPS
}
}
}).then(function () {
return cc.game.run();
});
}
}]);
return Application;
}());
}
};
});4、关闭进度条和logo的显示的监听
System.register(["./application.js"], function (_export, _context) {
"use strict";
var Application, canvas, $p, bcr, application;
//------注册第一个场景 是否加载完成监听-----------------
function setLoadingDisplay () {
console.log('Engine is initialized');
cc.director.once(cc.Director.EVENT_AFTER_SCENE_LAUNCH, function () {
console.log('game run over' );
//关闭进度条显示
splash.style.display = 'none';
//关闭计时，但有时无效，未找到原因，有好的修改方案告知下
if (application.timer) {
clearInterval(application.timer);
}
});
}
//------ end-----------------
function topLevelImport(url) {
return System["import"](url);
}
return {
setters: [function (_applicationJs) {
Application = _applicationJs.Application;
}],
execute: function () {
canvas = document.getElementById('GameCanvas');
$p = canvas.parentElement;
bcr = $p.getBoundingClientRect();
canvas.width = bcr.width;
canvas.height = bcr.height;
application = new Application();
topLevelImport('cc').then(function (engine) {
//------cc 文件加载完后，添加监听-----------------
setLoadingDisplay();
//------end-----------------
return application.init(engine);
}).then(function () {
return application.start();
})["catch"](function (err) {
console.error(err);
});
}
};
});以上就是全部修改内容，但由于每次发布都得修改，所以我将以上内容放入到引擎默认模板中，splash.png放在了项目模板下，就可以勾选md5 也不会更新不到了
5、修改引擎模板
路劲：F:\cocos-dashboard-editors\3.6.3\resources\resources\3d\engine\templates\web-mobile
index.html-》index.ejs
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title><%= projectName %></title>
<!--http://www.html5rocks.com/en/mobile/mobifying/-->
<meta name="viewport"
content="width=device-width,user-scalable=no,initial-scale=1,minimum-scale=1,maximum-scale=1,minimal-ui=true"/>
<!--https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariHTMLRef/Articles/MetaTags.html-->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="format-detection" content="telephone=no">
<!-- force webkit on 360 -->
<meta name="renderer" content="webkit"/>
<meta name="force-rendering" content="webkit"/>
<!-- force edge on IE -->
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
<meta name="msapplication-tap-highlight" content="no">
<!-- force full screen on some browser -->
<meta name="full-screen" content="yes"/>
<meta name="x5-fullscreen" content="true"/>
<meta name="360-fullscreen" content="true"/>
<!--fix fireball/issues/3568 -->
<!--<meta name="browsermode" content="application">-->
<meta name="x5-page-mode" content="app">
<!--<link rel="apple-touch-icon" href=".png" />-->
<!--<link rel="apple-touch-icon-precomposed" href=".png" />-->
<link rel="stylesheet" type="text/css" href="<%= cssUrl %>"/>
</head>
<body>
<div id="GameDiv" cc_exact_fit_screen="true">
<div id="Cocos3dGameContainer">
<canvas id="GameCanvas" oncontextmenu="event.preventDefault()" tabindex="99"></canvas>
</div>
</div>
<div id="splash">
<div class="progress-bar stripes">
<span style="width: 0%"></span>
</div>
</div>
<%- include(cocosTemplate, {}) %>
<script type="text/javascript">
(function () {
var splash = document.getElementById('splash');
splash.style.display = 'block';
})();
</script>
</body>
</html>
index.js-》index.js.ejs
import { Application } from '<%= applicationJS %>';
const canvas = document.getElementById('GameCanvas');
const $p = canvas.parentElement;
const bcr = $p.getBoundingClientRect();
canvas.width = bcr.width;
canvas.height = bcr.height;
// 是否加载执行完成
function setLoadingDisplay () {
console.log('Engine is initialized');
cc.director.once(cc.Director.EVENT_AFTER_SCENE_LAUNCH, function () {
console.log('game run over' );
splash.style.display = 'none';
if (application.timer) {
clearInterval(application.timer);
}
});
}
function topLevelImport (url) {
return System.import(url);
}
const application = new Application();
topLevelImport('cc')
.then((engine) => {
//监听
setLoadingDisplay();
return application.init(engine);
}).then(() => {
return application.start();
}).catch((err) => {
console.error(err);
});
style.css
html {
-ms-touch-action: none;
}
body, canvas, div {
display: block;
outline: none;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
user-select: none;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
-khtml-user-select: none;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
/* Remove spin of input type number */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
/* display: none; <- Crashes Chrome on hover */
-webkit-appearance: none;
margin: 0; /* <-- Apparently some margin are still there even though it's hidden */
}
body {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
padding: 0;
border: 0;
margin: 0;
cursor: default;
color: #888;
background-color: #333;
text-align: center;
font-family: Helvetica, Verdana, Arial, sans-serif;
display: flex;
flex-direction: column;
}
canvas {
background-color: rgba(0, 0, 0, 0);
}
#GameDiv, #Cocos3dGameContainer, #GameCanvas {
width: 100%;
height: 100%;
}
/********************进度条********************/
.progress-bar {
background-color: #1a1a1a;
position: absolute;
left: 25%;
top: 80%;
height: 14px;
padding: 5px;
width: 50%;
/*margin: 0 -175px; */
border-radius: 5px;
box-shadow: 0 1px 5px #000 inset, 0 1px 0 #444;
}
.progress-bar span {
display: block;
height: 100%;
border-radius: 3px;
box-shadow: 0 1px 0 rgba(255, 255, 255, .5) inset;
transition: width .4s ease-in-out;
background-color: #34c2e3;
}
.stripes span {
background-size: 30px 30px;
background-image: linear-gradient(135deg, rgba(255, 255, 255, .15) 25%, transparent 25%,
transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%,
transparent 75%, transparent);
animation: animate-stripes 1s linear infinite;
}
#splash {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: #171717 url(./splash.png) no-repeat center;
background-size: 45%;
}
application.js-》application.ejs
F:\cocos-dashboard-editors\3.6.3\resources\resources\3d\engine\templates\launcher
<%- include(versionCheckTemplate, { version: '1.0.0'}) %>
let cc;
//---------------自动 updata Progress--------------
var percentJd=0;
var timer =setInterval(() => {
const now = new Date();
//console.log(now.toString());
if (percentJd<90) {
percentJd=percentJd+1;
onProgress(percentJd);
} else{
clearInterval(timer);
}
}, 1000);
function onProgress(percent){
if (percent>percentJd) {
percentJd=percent;
}
var progressBar = splash.querySelector('.progress-bar span');
// var percent = 100 * finish / total;
if (progressBar) {
progressBar.style.width = percent + '%';
}
}
//------------end-----------------
export class Application {
constructor () {
this.settingsPath = '<%= settingsJsonPath %>';
this.showFPS = <%= showFPS %>;
}
init (engine) {
cc = engine;
cc.game.onPostBaseInitDelegate.add(this.onPostInitBase.bind(this));
cc.game.onPostSubsystemInitDelegate.add(this.onPostSystemInit.bind(this));
}
onPostInitBase () {
// cc.settings.overrideSettings('assets', 'server', '');
// do custom logic
}
onPostSystemInit () {
// do custom logic
}
start () {
// 手动更新
onProgress(50);
return cc.game.init({
debugMode: <%= debugMode %> ? cc.DebugMode.INFO : cc.DebugMode.ERROR,
settingsPath: this.settingsPath,
overrideSettings: {
// assets: {
// preloadBundles: [{ bundle: 'main', version: 'xxx' }],
// }
profiling: {
showFPS: this.showFPS,
}
}
}).then(() => cc.game.run());
}
}
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