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[Java教程]jquery——滚动条插件jscroll.js

一、效果如下

点击“测试中奖纪录”弹出弹框。弹框中内容超出时显示滚动条。

二、代码部分

1、html结构

<body>   <a href="javascript:;" id="bbb">测试中奖纪录</a>   <!--弹框6中奖纪录-->  <div class="tcbox" id="reward_info" style="display:none">    <div class="tcmain6">      <div class="tcclose"></div>      <div class="tc-content6">        <div class="top-wrap">          <h2>中奖纪录</h2>        </div>        <dl class="num-list" id="test-list">          <dt><span class="list-num">第20151225004期</span><span class="list-right">2015-12-25 11:01:12</span></dt>          <dd>            <div class="record-img-left"> <img src="images/s1.jpg"> </div>            <div class="record-right">              <h4>中奖幸运号:<span>10001234</span></h4>              <p>奖品筹备中, 等待发货</p>              <p>中通, 1273637484637333</p>            </div>          </dd>          <dt><span class="list-num">第20151225003期</span><span class="list-right">2015-12-25 11:01:12</span></dt>          <dd>            <div class="record-img-left"> <img src="images/s1.jpg"> </div>            <div class="record-right">              <h4>中奖幸运号:<span>10001234</span></h4>              <p>奖品筹备中, 等待发货</p>              <p>中通, 1273637484637333</p>            </div>          </dd>          <dt><span class="list-num">第20151225002期</span><span class="list-right">2015-12-25 11:01:12</span></dt>          <dd>            <div class="record-img-left"> <img src="images/s1.jpg"> </div>            <div class="record-right">              <h4>中奖幸运号:<span>10001234</span></h4>              <p>奖品筹备中, 等待发货</p>              <p>中通, 1273637484637333</p>            </div>          </dd>          <dt><span class="list-num">第20151225001期</span><span class="list-right">2015-12-25 11:01:12</span></dt>          <dd>            <div class="record-img-left"> <img src="images/s1.jpg"> </div>            <div class="record-right">              <h4>中奖幸运号:<span>10001234</span></h4>              <p>奖品筹备中, 等待发货</p>              <p>中通, 1273637484637333</p>            </div>          </dd>        </dl>      </div>      <p class="p-bottom">*您还没有填写过<a href="javascript:;">领奖地址</a>,不要和奖品擦肩而过啊</p>    </div>  </div></body>

2、css如下

/*弹框1*/.tcbox { width: 100%; height: 100%; position: fixed; top: 0px; left: 0px; background: transparent url("http://static9.pplive.cn/oth/2015/yiyuan/v_20150820174118/images/blackbg.png") repeat scroll 0% 0%; z-index: 999; }.tcclose { width: 50px; height: 50px; cursor: pointer; position: absolute; top: 0px; right: -50px; background: url(../images/close-button.png) no-repeat center; overflow: hidden; }/*弹层6*/.tcmain6 { width: 500px; height: 610px; position: absolute; top: 50%; left: 50%; margin: -305px 0px 0px -250px; background: #fff; }.tc-content6 .top-wrap { height: 54px; font-size: 16px; background-color: #f6f6f6; color: #4d4d4d; padding-top: 22px; }.tc-content6 .top-wrap h2 { font-size: 20px; color: #333; text-align: center; padding-bottom: 5px; }.tc-content6 .list-num { font-size: 16px; line-height: 22px; color: #1a1a1a; font-weight: 700; }.tc-content6 .list-right { padding-left: 12px; font-size: 13px; color: #b2b2b2; }.tc-content6 .p-title span { color: #ff6200; }.tc-content6 .num-list { margin: 22px 24px 28px 40px; height: 453px; overflow: hidden; }.tc-content6 .num-list dt { font-size: 14px; color: #1a1a1a; padding-bottom: 10px; }.tc-content6 .num-list dd { font-size: 14px; color: #666; padding-left: 10px; padding-bottom: 30px; }.p-bottom a { color: #ff6200; text-decoration: underline; }.tc-content6 .record-img-left { width: 90px; height: 90px; border: 1px solid #b2b2b2; float: left; }.tc-content6 .record-img-left img { display: block; width: 90px; }.tc-content6 .record-right { margin-left: 105px; }.tc-content6 .record-right h4 { font-size: 16px; color: #1a1a1a; font-weight: normal; padding-bottom: 8px; border-bottom: 1px dotted #e3e3e3; margin-bottom: 10px; }.tc-content6 .record-right h4 span { color: #ff6200; margin-left: 8px; }.tc-content6 .record-right p { font-size: 13px; color: #808080; line-height: 24px; }

3、重点部分,js

<script type="text/javascript">  $.fn.extend({//添加滚轮事件//by jun  mousewheel:function(Func){    return this.each(function(){      var _self = this;      _self.D = 0;//滚动方向      if($.browser.msie||$.browser.safari){        _self.onmousewheel=function(){_self.D = event.wheelDelta;event.returnValue = false;Func && Func.call(_self);};      }else{        _self.addEventListener("DOMMouseScroll",function(e){          _self.D = e.detail>0?-1:1;          e.preventDefault();          Func && Func.call(_self);        },false);       }    });  }});$.fn.extend({  jscroll:function(j){    return this.each(function(){      j = j || {}      j.Bar = j.Bar||{};//2级对象      j.Btn = j.Btn||{};//2级对象      j.Bar.Bg = j.Bar.Bg||{};//3级对象      j.Bar.Bd = j.Bar.Bd||{};//3级对象      j.Btn.uBg = j.Btn.uBg||{};//3级对象      j.Btn.dBg = j.Btn.dBg||{};//3级对象      var jun = { W:"12px"            ,BgUrl:""            ,Bg:"#fff586"            ,Bar:{ Pos:"up"                ,Bd:{Out:"#f9f0d5",Hover:"#f9f0d5"}                ,Bg:{Out:"#fe970e",Hover:"#fe970e",Focus:"orange"}}            ,Btn:{ btn:true                ,uBg:{Out:"#fe970e",Hover:"#fe970e",Focus:"orange"}                ,dBg:{Out:"#fe970e",Hover:"#fe970e",Focus:"orange"}}            ,Fn:function(){}}      j.W = j.W||jun.W;      j.BgUrl = j.BgUrl||jun.BgUrl;      j.Bg = j.Bg||jun.Bg;        j.Bar.Pos = j.Bar.Pos||jun.Bar.Pos;          j.Bar.Bd.Out = j.Bar.Bd.Out||jun.Bar.Bd.Out;          j.Bar.Bd.Hover = j.Bar.Bd.Hover||jun.Bar.Bd.Hover;          j.Bar.Bg.Out = j.Bar.Bg.Out||jun.Bar.Bg.Out;          j.Bar.Bg.Hover = j.Bar.Bg.Hover||jun.Bar.Bg.Hover;          j.Bar.Bg.Focus = j.Bar.Bg.Focus||jun.Bar.Bg.Focus;        j.Btn.btn = j.Btn.btn!=undefined?j.Btn.btn:jun.Btn.btn;          j.Btn.uBg.Out = j.Btn.uBg.Out||jun.Btn.uBg.Out;          j.Btn.uBg.Hover = j.Btn.uBg.Hover||jun.Btn.uBg.Hover;          j.Btn.uBg.Focus = j.Btn.uBg.Focus||jun.Btn.uBg.Focus;          j.Btn.dBg.Out = j.Btn.dBg.Out||jun.Btn.dBg.Out;          j.Btn.dBg.Hover = j.Btn.dBg.Hover||jun.Btn.dBg.Hover;          j.Btn.dBg.Focus = j.Btn.dBg.Focus||jun.Btn.dBg.Focus;      j.Fn = j.Fn||jun.Fn;      var _self = this;      var Stime,Sp=0,Isup=0;      $(_self).css({overflow:"hidden",position:"relative",padding:"0px"});      var dw = $(_self).width(), dh = $(_self).height()-1;      var sw = j.W ? parseInt(j.W) : 21;      var sl = dw - sw      var bw = j.Btn.btn==true ? sw : 0;      if($(_self).children(".jscroll-c").height()==null){//存在性检测    $(_self).wrapInner("<div class='jscroll-c' style='top:0px;z-index:88;zoom:1;position:relative'></div>");      $(_self).children(".jscroll-c").prepend("<div style='height:0px;overflow:hidden'></div>");      $(_self).append("<div class='jscroll-e' unselectable='on' style=' height:100%;border-radius:4px;top:0;right:0;-moz-user-select:none;position:absolute;overflow:hidden;z-index:89;'><div class='jscroll-u' style='position:absolute;top:0px;width:100%;left:0;background:blue;overflow:hidden'></div><div class='jscroll-h' unselectable='on' style='background:green;position:absolute;left:0;cursor:pointer;border-radius:10px;-moz-user-select:none;border:2px solid'></div><div class='jscroll-d' style='position:absolute;bottom:0px;width:100%;left:0;background:blue;overflow:hidden'></div></div>");      }      var jscrollc = $(_self).children(".jscroll-c");      var jscrolle = $(_self).children(".jscroll-e");      var jscrollh = jscrolle.children(".jscroll-h");      var jscrollu = jscrolle.children(".jscroll-u");      var jscrolld = jscrolle.children(".jscroll-d");      if($.browser.msie){document.execCommand("BackgroundImageCache", false, true);}      jscrollc.css({"padding-right":sw});      jscrolle.css({width:sw,background:j.Bg,"background-image":j.BgUrl});      jscrollh.css({top:bw,background:j.Bar.Bg.Out,"background-image":j.BgUrl,"border-color":j.Bar.Bd.Out,width:sw-4});      jscrollu.css({height:bw,background:j.Btn.uBg.Out,"background-image":j.BgUrl});      jscrolld.css({height:bw,background:j.Btn.dBg.Out,"background-image":j.BgUrl});      jscrollh.hover(function(){if(Isup==0)$(this).css({background:j.Bar.Bg.Hover,"background-image":j.BgUrl,"border-color":j.Bar.Bd.Hover})},function(){if(Isup==0)$(this).css({background:j.Bar.Bg.Out,"background-image":j.BgUrl,"border-color":j.Bar.Bd.Out})})      jscrollu.hover(function(){if(Isup==0)$(this).css({background:j.Btn.uBg.Hover,"background-image":j.BgUrl})},function(){if(Isup==0)$(this).css({background:j.Btn.uBg.Out,"background-image":j.BgUrl})})      jscrolld.hover(function(){if(Isup==0)$(this).css({background:j.Btn.dBg.Hover,"background-image":j.BgUrl})},function(){if(Isup==0)$(this).css({background:j.Btn.dBg.Out,"background-image":j.BgUrl})})      //alert(jscrollc.height());      //alert(jscrollc.width());                              var sch = jscrollc.height();      //var sh = Math.pow(dh,2) / sch ;//Math.pow(x,y)x的y次方      //alert("dh :"+dh);  //lxy      //alert("bw :"+bw);  //lxy      //alert("sch :"+sch);                        var sh = (dh-2*bw)*dh / sch;      //alert(sh);//lxy      if(sh<10){sh=10}      var wh = sh/6       //  sh = parseInt(sh);      var curT = 0,allowS=false;      //alert(sh);//lxy      jscrollh.height(sh);     //console.log(sch+":"+dh);      if(sch<=dh){jscrollc.css({padding:0});jscrolle.css({display:"none"})}else{jscrolle.css({display:"block"});allowS=true;}      if(j.Bar.Pos!="up"){      curT=dh-sh-bw;      setT();      }      jscrollh.bind("mousedown",function(e){        j['Fn'] && j['Fn'].call(_self);        Isup=1;        jscrollh.css({background:j.Bar.Bg.Focus,"background-image":j.BgUrl})        var pageY = e.pageY ,t = parseInt($(this).css("top"));        $(document).mousemove(function(e2){           curT =t+ e2.pageY - pageY;//pageY浏览器可视区域鼠标位置,screenY屏幕可视区域鼠标位置            setT();        });        $(document).mouseup(function(){          Isup=0;          jscrollh.css({background:j.Bar.Bg.Out,"background-image":j.BgUrl,"border-color":j.Bar.Bd.Out})          $(document).unbind();        });        return false;      });      jscrollu.bind("mousedown",function(e){      j['Fn'] && j['Fn'].call(_self);        Isup=1;        jscrollu.css({background:j.Btn.uBg.Focus,"background-image":j.BgUrl})        _self.timeSetT("u");        $(document).mouseup(function(){          Isup=0;          jscrollu.css({background:j.Btn.uBg.Out,"background-image":j.BgUrl})          $(document).unbind();          clearTimeout(Stime);          Sp=0;        });        return false;      });      jscrolld.bind("mousedown",function(e){      j['Fn'] && j['Fn'].call(_self);        Isup=1;        jscrolld.css({background:j.Btn.dBg.Focus,"background-image":j.BgUrl})        _self.timeSetT("d");        $(document).mouseup(function(){          Isup=0;          jscrolld.css({background:j.Btn.dBg.Out,"background-image":j.BgUrl})          $(document).unbind();          clearTimeout(Stime);          Sp=0;        });        return false;      });      _self.timeSetT = function(d){        var self=this;        if(d=="u"){curT-=wh;}else{curT+=wh;}        setT();        Sp+=2;        var t =500 - Sp*50;        if(t<=0){t=0};        Stime = setTimeout(function(){self.timeSetT(d);},t);      }      jscrolle.bind("mousedown",function(e){          j['Fn'] && j['Fn'].call(_self);              curT = curT + e.pageY - jscrollh.offset().top - sh/2;              asetT();              return false;      });      function asetT(){                    if(curT<bw){curT=bw;}            if(curT>dh-sh-bw){curT=dh-sh-bw;}            jscrollh.stop().animate({top:curT-2},100);            var scT = -((curT-bw)*sch/(dh-2*bw));            jscrollc.stop().animate({top:scT},1000);      };      function setT(){                    if(curT<bw){curT=bw;}            if(curT>dh-sh-bw){curT=dh-sh-bw;}            jscrollh.css({top:curT-2});            var scT = -((curT-bw)*sch/(dh-2*bw));            jscrollc.css({top:scT});      };      $(_self).mousewheel(function(){          if(allowS!=true) return;          j['Fn'] && j['Fn'].call(_self);          if(this.D>0){curT-=wh;}else{curT+=wh;};          setT();      })    });  }});$("#bbb").click(function(){        $("#reward_info").show();  $(".num-list").jscroll({        W:"8px"  //滚动条宽度        ,BgUrl:""  //背景条图片路径        ,Bg:"#d6d6d6" //背景条颜色        ,Bar:{ Pos:"up"  //滚动条默认在顶部,换成down则默认在底部            ,Bd:{Out:"#ff6200",Hover:"#d75606"} //移动条的边框颜色/鼠标一上去的颜色            ,Bg:{Out:"#ff6200",Hover:"#d75606",Focus:"a44103"}} //移动条的填充颜色,移动上去的颜色,点击的颜色        ,Btn:{ btn:false   //换成false则上下按钮不显示            ,uBg:{Out:"#633",Hover:"#966",Focus:"c99"} //上面按钮的填充颜色,移动上去的颜色,点击的颜色            ,dBg:{Out:"#633",Hover:"#966",Focus:"c99"}} //下面按钮的填充颜色,移动上去的颜色,点击的颜色        ,Fn:function(){}      });      });</script>

三、注意事项

1、对jquery库有要求

我平时测试习惯调用在线jquery,地址如下,容易记。

<script src="http://code.jquery.com/jquery-latest.js"></script>

版本为:v1.11.1,在jscroll.js库不支持该版本的jquery。应当使用高版本的。jQuery 1.2.3测试没问题。

2、弹层中显示注意

一定是先调用$("#reward_info").show();把弹层显示出来,再调用$(".num-list").jscroll()方法显示滚动条。

因为原理是要获得内容的高度。在调用show前,没有渲染,得不到高度,显示不出滚动条。

3、高度变化时及时刷新 

当内容高度变化时,需及时调用$(".num-list").jscroll()刷新才能正确显示。 

 

 

本文作者starof,因知识本身在变化,作者也在不断学习成长,文章内容也不定时更新,为避免误导读者,方便追根溯源,请诸位转载注明出处:http://www.cnblogs.com/starof/p/5128341.html有问题欢迎与我讨论,共同进步。