html

<style type="text/css">
    #slideDown{margin-top: 0;width: 100%;}
         #slideDown1,#slideDown2{width: 100%;height: 70px;;background: #e9f4f7;display: none;}
         #slideDown1{height: 20px;}
         #slideDown1>p,#slideDown2>p{margin: 20px auto;text-align:center;font-size: 14px;color: #37bbf5;}
</style>


    <div id="content">
        <div id="slideDown">
            <div id="slideDown1">
                <p>松开刷新</p>
            </div>
            <div id="slideDown2">
                <p>正在刷新 ...</p>
            </div>
        </div>
        <div class="myContent">
            <ul>
                <li>item1 -- item1 -- item1</li>
                <li>item2 -- item2 -- item2</li>
                <li>item3 -- item3 -- item3</li>
                <li>item4 -- item4 -- item4</li>
                <li>item5 -- item5 -- item5</li>
                <li>item6 -- item6 -- item6</li>
                <li>item7 -- item7 -- item7</li>
            </ul>
        </div>
    </div>

js部分

<script type="text/javascript">
    //第一步：下拉过程
    function slideDownStep1(dist){  // dist 下滑的距离，用以拉长背景模拟拉伸效果
        var slideDown1 = document.getElementById("slideDown1"),
            slideDown2 = document.getElementById("slideDown2");
        slideDown2.style.display = "none";
        slideDown1.style.display = "block";
        slideDown1.style.height = (parseInt("20px") - dist) + "px";
    }
    //第二步：下拉，然后松开，
    function slideDownStep2(){ 
        var slideDown1 = document.getElementById("slideDown1"),
            slideDown2 = document.getElementById("slideDown2");
        slideDown1.style.display = "none";
        slideDown1.style.height = "20px";
        slideDown2.style.display = "block";
        //刷新数据
        //location.reload();
    }
    //第三步：刷新完成，回归之前状态
    function slideDownStep3(){ 
        var slideDown1 = document.getElementById("slideDown1"),
            slideDown2 = document.getElementById("slideDown2");
        slideDown1.style.display = "none";
        slideDown2.style.display = "none";
    }

    //下滑刷新调用
    k_touch("content","y");
    //contentId表示对其进行事件绑定，way==>x表示水平方向的操作，y表示竖直方向的操作
    function k_touch(contentId,way){ 
        var _start = 0,
            _end = 0,
            _content = document.getElementById(contentId);
        _content.addEventListener("touchstart",touchStart,false);
        _content.addEventListener("touchmove",touchMove,false);
        _content.addEventListener("touchend",touchEnd,false);
        function touchStart(event){ 
            //var touch = event.touches[0]; //这种获取也可以，但已不推荐使用

            var touch = event.targetTouches[0];
            if(way == "x"){ 
                _start = touch.pageX;
            }else{ 
                _start = touch.pageY;
            }
        }
        function touchMove(event){ 
            var touch = event.targetTouches[0];
            if(way == "x"){ 
                _end = (_start - touch.pageX);
            }else{ 
                _end = (_start - touch.pageY);
                //下滑才执行操作
                if(_end < 0){
                    slideDownStep1(_end);
                }
            }

        }
        function touchEnd(event){ 
            if(_end >0){ 
                console.log("左滑或上滑  "+_end);
            }else{ 
                console.log("右滑或下滑"+_end);
                slideDownStep2();
                //刷新成功则
                //模拟刷新成功进入第三步
                setTimeout(function(){ 
                    slideDownStep3();
                },2500);
            }
        }
    }
    </script>