分享一個JQuery寫的點擊上下滾動的小例子

時間 2019-11-25
原文原文鏈接
效果圖javascript
代碼以下：html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>demo</title>
<script src="http://libs.baidu.com/jquery/1.7.2/jquery.js" type="text/javascript"></script>
<script type="text/javascript">
    if (typeof jQuery == 'undefined') {
        document.write(unescape("%3Cscript src='./js/jquery-1.7.2.js' type='text/javascript'%3E%3C/script%3E"));
    }
</script>
<style type="text/css">
    /*全局控制*/
    body{margin:0;padding:0;font-size:12px;font-family:"微軟雅黑";-webkit-text-size-adjust:none;min-width: 1200px;}
    html,body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td,p{margin:0;padding:0;}
    input,select,textarea{font-size:12px;line-height:16px;}img{border:0;}ul,li{list-style-type:none;}
    a{color:#333;text-decoration:none;}
    a:hover{text-decoration:underline;}
    /*顯示樣式*/
    .tab_type li {background-color: #DDDEDC;width: 86px;line-height: 34px;text-align: center;margin-bottom: 1px;}
    .tab_type li a{ display: block; font-weight: bold;}
    .tab_type li a:hover{text-decoration: none;background-color:#D3B92A;}
    .tab_type li span{margin:0 2px;}
    .t_f{position: relative;top: -9px;font-size: 14px;}
    .t_n{font-size: 18px;}
    /*重要樣式*/
    #scrollDiv{width: 86px;height: 185px;min-height: 25px;overflow: hidden;}
</style>
<script type="text/javascript">
    /*重要腳本*/
 (function ($) {
            $.fn.extend({
                Scroll: function (opt, callback) {
                    if (!opt) var opt = {};
                    var _btnUp = $("#" + opt.up); //Shawphy:向上按鈕      
                    var _btnDown = $("#" + opt.down); //Shawphy:向下按鈕
                    var _this = this.eq(0).find("ul:first");
                    var lineH = _this.find("li:first").height()+1; //獲取行高  此處我加了1 由於樣式中用到了margin-bottom:1px 這個根據本身狀況修改   
                    var line = opt.line ? parseInt(opt.line, 10) : parseInt(this.height() / lineH, 10); //每次滾動的行數，默認爲一屏，即父容器高度
                    var speed = opt.speed ? parseInt(opt.speed, 10) : 600; //捲動速度，數值越大，速度越慢（毫秒） 
                    var m = 0;  //用於計算的變量
                    var count = _this.find("li").length; //總共的<li>元素的個數
                    var upHeight = line * lineH;
                    var showline = opt.showline;//顯示多少行
                    function scrollUp() {
                        if (!_this.is(":animated")) {  //判斷元素是否正處於動畫，若是不處於動畫狀態，則追加動畫。
                            if (m < count) {  //判斷 m 是否小於總的個數
                                var go_count = count-m-showline;
                                if((count-m)>showline){
                                    if(go_count<line){
                                        m += go_count;
                                        upHeight =  go_count * lineH;
                                        _this.animate({ marginTop: "-=" + upHeight + "px" }, speed);
                                    }else{
                                        m += line;
                                        upHeight =  line * lineH;
                                        _this.animate({ marginTop: "-=" + upHeight + "px" }, speed);
                                    }
                                }else{


                                }
                            }
                        }
                    }
                    function scrollDown() {
                        if (!_this.is(":animated")) {
                            if(m>0){
                                if (m > line) { //判斷m 是否大於一屏個數
                                    m -= line;
                                    upHeight =  line * lineH;
                                    _this.animate({ marginTop: "+=" + upHeight + "px" }, speed);
                                }else{
                                    upHeight =  m * lineH;
                                    m -= m;
                                    _this.animate({ marginTop: "+=" + upHeight + "px" }, speed);
                                }
                            }
                        }
                    }
                    _btnUp.bind("click", scrollUp);
                    _btnDown.bind("click", scrollDown);
                }
            });
        })(jQuery);
      $(function () {
            $("#scrollDiv").Scroll({ line: 2, speed: 500,up: "btn1", down: "btn2",showline:5 });
        });
</script>
</head>
<body>
    <div class="tab_type">
        <!--核心代碼 開始-->
        <div id="scrollDiv">
            <ul>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">36</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">38</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">40</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">52</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">60</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">70</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">80</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">92</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">120</span><span class="">mm</span></a></li>
                    <li><a href="javascript:"><span class="t_f">□</span><span class="t_n">130</span><span class="">mm</span></a></li>
            </ul>
        </div>
        <input type="button" id="btn1" value="上滾" />
        <input type="button" id="btn2" value="下滾" />
        <!--核心代碼 結束-->
    </div>

</body>
</html>
轉載自:http://www.9958.pw/post/jquery_up_and_downjava
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