touch上滑加载

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="initial-scale=1, user-scalable=0, minimal-ui" charset="UTF-8">
    <style type="text/css">
        *{margin: 0;padding:0}
        #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>


</head>
<body>

<div id="content">

    <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 id="slideDown">
        <div id="slideDown1">
            <p>松开刷新</p>
        </div>
        <div id="slideDown2">
            <p>正在刷新 ...</p>
        </div>
    </div>
</div>
<script>
    //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);
                slideDownStep2();
                //刷新成功则
                //模拟刷新成功进入第三步
                setTimeout(function(){
                    slideDownStep3();
                },2500);
            }else{
                console.log("右滑或下滑"+_end);
            }
        }
    }

</script>
</body>
</html>
posted @ 2017-06-01 13:45 刘浩2561179983 阅读(100) 评论(0) 编辑收藏举报
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touch上滑加载

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