jquery模拟picker实现滑动选择效果
本文实例为大家分享了jquery模拟picker实现滑动选择效果的具体代码,供大家参考,具体内容如下
代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" /> <title></title> <style type="text/css"> html,body{ width: 100%; height: 100%; } div{ box-sizing: border-box; } .flex{ display: flex; } .billing_cent { width: 100%;height: 100%; position: fixed; left: 0; top: 0; z-index: 10; background-color: #000000; } .billing_cent_data { width: 100%; height: 100%; justify-content: center; align-items: center; } .billing_select { width: 230px; height: 257px; background: #FFFFFF; position: relative; border-radius: 3px; } .billing_select_top>div { text-align: center; font-size: 16px; color: #333333; padding: 20px 0; } .billing_select_top>img { width: 7px; height: 13px; position: absolute; right: 10px; top: 10px; z-index: 3;cursor: pointer; } .billing_select_center { width: 100%; height: 141px; padding: 0 20px; overflow: hidden; position: relative; } .billing_select_bot { width: 100%; text-align: center; height: 45px; line-height: 45px; background: #EEEEEE; text-align: center; position: absolute; left: 0; bottom: 0; z-index: 3; border-radius: 3px; } .billing_select_center>ul { margin: 0 auto; display: block; box-sizing: border-box; width: 100%; height: 100%; overflow: auto; padding: 47px 0; position: absolute; left: 0; top: 0; z-index: 3; } .billing_select_center>ul>li { width: 100%; height: 47px; line-height: 47px; font-size: 15px; color: #333333; text-align: center; opacity: .5; } .billing_select_border { width: calc(100% - 40px); left: 20px; height: 1px; position: absolute; top: 47px; background-color: #F2F2F2; } .billing_opacity{ opacity: 1 !important; } .billing_select_border2 { width: calc(100% - 40px); left: 20px; height: 1px; position: absolute; top: 94px; background-color: #F2F2F2; } </style> </head> <body> <div class="billing_cent"> <div class="billing_cent_data flex"> <div class="billing_select"> <div class="billing_select_top"> <div>请选择发票内容</div> <img src="img/icon36.png" alt="..." /> </div> <div class="billing_select_center"> <ul> <li class="billing_opacity"> 饮料 </li> <li> 酒水 </li> <li> 王老吉 </li> <li> 老白干 </li> <li> 营养快线 </li> <li> 脉动 </li> </ul> <div class="billing_select_border"></div> <div class="billing_select_border2"></div> </div> <div class="billing_select_bot"> 确定 </div> </div> </div> </div> <script src="js/jq.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript"> // 监听滚动事件 var scroll_index=0;//默认index const $ScrollWrap = $(".billing_select_center>ul") // 监听滚动停止 let t1 = 0; let t2 = 0; let timer = null; // 定时器 $ScrollWrap.on("touchstart", function() { // 触摸开始 ≈ 滚动开始 }) $ScrollWrap.on("scroll", function() { // 滚动 clearTimeout(timer) timer = setTimeout(isScrollEnd, 100) t1 = $ScrollWrap.scrollTop() }) function isScrollEnd() { t2 = $ScrollWrap.scrollTop(); if (t2 == t1) { // 滚动停止 clearTimeout(timer) // 获取每个li距离顶部边框的距离 var leng = $(".billing_select_center>ul>li").length; for (var k = 0; k < leng; k++) { var top_leng = $(".billing_select_center>ul").children("li").eq(k).position().top; // 区间在 30 ~ 60 之间则选中 这个区间范围是根据高度来决定的 if (top_leng >= 30 && top_leng <= 60) { scroll_index=k; $("li").removeClass("billing_opacity"); $(".billing_select_center>ul").children("li").eq(k).addClass("billing_opacity"); // 滚动到相应位置 每个li高度 47px var scrool_heg = k * 47; $(".billing_select_center>ul").scrollTop(scrool_heg); } } } } </script> </body> </html>
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