页面预加载loading动画，再载入内容

2024-06-28 04:44| 来源: 网络整理| 查看: 265

默认情况下如果网站请求速度慢，所以会有一段时间的空白页面等等，用户体验效果不好，见到很多的页面都有预加载的效果，加载之前先加载一个动画，后台进程继续加载页面内容，当页面内容加载完之后再退出动画显示内容，这样的用户体验更好。

例如此链接：http://crusader12.com/C12HoverAlls/

这篇文章是从上面链接的内容上拔下来的，操作流程很简单，只有两部如下

首先定义一个loader.css文件，如下内容

.chromeframe { margin: 0.2em 0; background: #ccc; color: #000; padding: 0.2em 0;} #loader-wrapper { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index:999999;} #loader { display: block; position: relative; left: 50%; top: 50%; width: 150px; height: 150px; margin: -75px 0 0 -75px; border-radius: 50%; border: 3px solid transparent; /* COLOR 1 */ border-top-color: #FFF; -webkit-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -ms-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -moz-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -o-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ animation: spin 2s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */ z-index:1001;} #loader:before { content: ""; position: absolute; top: 5px; left: 5px; right: 5px; bottom: 5px; border-radius: 50%; border: 3px solid transparent; /* COLOR 2 */ border-top-color: #FFF; -webkit-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -moz-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -o-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -ms-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ animation: spin 3s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */} #loader:after { content: ""; position: absolute; top: 15px; left: 15px; right: 15px; bottom: 15px; border-radius: 50%; border: 3px solid transparent; border-top-color: #FFF; /* COLOR 3 */ -moz-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -o-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -ms-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -webkit-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ animation: spin 1.5s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */} @-webkit-keyframes spin { 0%{ -webkit-transform: rotate(0deg); /* Chrome, Opera 15+, Safari 3.1+ */ -ms-transform: rotate(0deg); /* IE 9 */ transform: rotate(0deg); /* Firefox 16+, IE 10+, Opera */ }100%{ -webkit-transform: rotate(360deg); /* Chrome, Opera 15+, Safari 3.1+ */ -ms-transform: rotate(360deg); /* IE 9 */ transform: rotate(360deg); /* Firefox 16+, IE 10+, Opera */} } @keyframes spin { 0%{ -webkit-transform: rotate(0deg); /* Chrome, Opera 15+, Safari 3.1+ */ -ms-transform: rotate(0deg); /* IE 9 */ transform: rotate(0deg); /* Firefox 16+, IE 10+, Opera */ }100%{ -webkit-transform: rotate(360deg); /* Chrome, Opera 15+, Safari 3.1+ */ -ms-transform: rotate(360deg); /* IE 9 */ transform: rotate(360deg); /* Firefox 16+, IE 10+, Opera */} } #loader-wrapper .loader-section { position: fixed; top: 0; width: 51%; height: 100%; background: #1abc9c; /* Old browsers */ z-index: 1000; -webkit-transform: translateX(0); /* Chrome, Opera 15+, Safari 3.1+ */ -ms-transform: translateX(0); /* IE 9 */ transform: translateX(0); /* Firefox 16+, IE 10+, Opera */} #loader-wrapper .loader-section.section-left {left: 0;} #loader-wrapper .loader-section.section-right {right: 0;} /* Loaded */ .loaded #loader-wrapper .loader-section.section-left { -webkit-transform: translateX(-100%); /* Chrome, Opera 15+, Safari 3.1+ */ -ms-transform: translateX(-100%); /* IE 9 */ transform: translateX(-100%); /* Firefox 16+, IE 10+, Opera */ -webkit-transition: all 0.7s 0.3s cubic-bezier(0.645, 0.045, 0.355, 1.000); transition: all 0.7s 0.3s cubic-bezier(0.645, 0.045, 0.355, 1.000);} .loaded #loader-wrapper .loader-section.section-right { -webkit-transform: translateX(100%); /* Chrome, Opera 15+, Safari 3.1+ */ -ms-transform: translateX(100%); /* IE 9 */ transform: translateX(100%); /* Firefox 16+, IE 10+, Opera */ -webkit-transition: all 0.7s 0.3s cubic-bezier(0.645, 0.045, 0.355, 1.000); transition: all 0.7s 0.3s cubic-bezier(0.645, 0.045, 0.355, 1.000);} .loaded #loader { opacity: 0; -webkit-transition: all 0.3s ease-out; transition: all 0.3s ease-out;} .loaded #loader-wrapper { visibility: hidden; -webkit-transform: translateY(-100%); /* Chrome, Opera 15+, Safari 3.1+ */ -ms-transform: translateY(-100%); /* IE 9 */ transform: translateY(-100%); /* Firefox 16+, IE 10+, Opera */ -webkit-transition: all 0.3s 1s ease-out; transition: all 0.3s 1s ease-out;} /* JavaScript Turned Off */ .no-js #loader-wrapper {display: none;} .no-js h1 {color: #222222;} #loader-wrapper .load_title { font-family:'Open Sans'; color:#FFF; font-size:19px; width:100%; text-align:center; z-index:9999999999999; position:absolute; top:60%; opacity:1; line-height:30px; } #loader-wrapper .load_title span { font-weight:normal; font-style:italic; font-size:13px; color:#FFF; opacity:0.5;}

第二步：在网站页面header标签和body标签加入以下代码

// 引入jquery // 等待所有加载 $(window).load(function(){ $('body').addClass('loaded'); $('#loader-wrapper .load_title').remove(); }); 正在加载LoveFeel站点V1.0

HoverAlls页面源码如下操作，他先是加载一段json封装之后再显示内容的，我上面的代码省去了json的操作。

$(window).load(function(){ $('body').addClass('loaded').Chameleon({ 'current_item':'hoveralls', 'json_url':'../Envato/items.json' }); $('#loader-wrapper .load_title').remove(); });

当然也可以访问我的页面看看效果 http://lovefeel.top/marry/

查看原文：http://www.ibloger.net/article/401.html