實現功能如下：
1. 二維碼展示功能；
2. “回到頂部”功能。(選擇“全屏預覽”，滑動滾動條，查看回到頂部功能)
效果圖：
圖(1) 初始效果
圖(2) 鼠標懸浮效果
實例代碼：
<!doctype html><html lang="zh-CN"><head><meta charset="utf-8" /><title>工具條</title><script type="text/javascript" src="https://code.jquery.com/jquery-3.1.1.min.js"></script><style type="text/css"> body{ background-color:#69C; } .toolbar{ position:fixed; left:50%; bottom:5px; margin-left:-26px; } .toolbar-item{ position:relative; display:block; width:52px; height:52px; background-image:url(http://cdn.attach.qdfuns.com/notes/pics/201703/01/160208u95waa2sfwt27hwh.png); background-repeat:no-repeat; margin-top:1px; -webkit-transition:background-position 1s; -moz-transition:background-position 1s; -ms-transition:background-position 1s; -o-transition:background-position 1s; transition:background-position 1s; } .toolbar-item-wenxin{ background-position:0 -798px; } .toolbar-item-wenxin:hover{ background-position:0 -860px; } .toolbar-item-feedback{ background-position:0 -426px; } .toolbar-item-feedback:hover{ background-position:0 -488px; } .toolbar-item-app{ background-position:0 -550px; } .toolbar-item-app:hover{ background-position:0 -612px; } .toolbar-item-top{ background-position:0 -674px; } .toolbar-item-top:hover{ background-position:0 -736px; } .toolbar-layer{ position:absolute; right:46px; bottom:-10px; width:172px; background-image:url(http://cdn.attach.qdfuns.com/notes/pics/201703/01/160208u95waa2sfwt27hwh.png); background-repeat:no-repeat; opacity:0; filter:alpha(opacity=0); -webkit-transform-origin:95% 95%; -moz-transition-origin:95% 95%; -ms-transition-origin:95% 95%; -o-transition-origin:95% 95%; transform-origin:95% 95%; -webkit-transition:scale(0.01); -moz-transition:scale(0.01); -ms-transition:scale(0.01); -o-transition:scale(0.01); transform:scale(0.01); -webkit-transition:all 1s; -moz-transition:all 1s; -ms-transition:all 1s; -o-transition:all 1s; transition:all 1s; } .toolbar-item-wenxin .toolbar-layer{ height:212px; background-position:0 0; } .toolbar-item-app .toolbar-layer{ height:194px; background-position:0 -222px; } .toolbar-item:hover .toolbar-layer{ opacity:1; filter:alpha(opacity=100); -webkit-transition:scale(1); -moz-transition:scale(1); -ms-transition:scale(1); -o-transition:scale(1); transform:scale(1); }</style><script type="text/javascript"> $(window).on('load',function(){ $('#backTop').on('click',go); $(window).on('scroll',function(){ checkPosition($(window).height()); }); checkPosition($(window).height());//防止剛開始刷新頁面，返回頂部沒有隱藏的問題，先讓它執行一次，使其fadeOut }) //到達頂部 function go(){ $('html,body').scrollTop(0); } //檢測位置 function checkPosition(pos){ if($(window).scrollTop() > pos){ $('#backTop').fadeIn();//滾動超過一個屏的寬度，就顯示 }else{ $('#backTop').fadeOut(); } }</script></head><body> <div class="toolbar"> <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="toolbar-item toolbar-item-wenxin"> <span class="toolbar-layer"></span> </a> <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="toolbar-item toolbar-item-feedback"></a> <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="toolbar-item toolbar-item-app"> <span class="toolbar-layer"></span> </a> <a id="backTop" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="toolbar-item toolbar-item-top"> </a> </div> <!--出現滾動條--> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p> <p>1</p></body></html>以上就是本文的全部內容，希望本文的內容對大家的學習或者工作能帶來一定的幫助，同時也希望多多支持武林網！
新聞熱點
疑難解答
