粘性表行 [英] Sticky table rows

问题描述

我正在尝试实现类似于iOS的日历列表视图.基本上，我现在要做的是遍历事件数组.如果是新日期，则打印日期标题，否则打印日历事件.我想使DATE HEADER行保持粘性，直到它们滚动"为止.

I am trying to implement a calendar list view like the iOS one. Basically, what I am doing now is to loop through my array of events. If it is a new date, print a date header, else print the calendar event. I want to make the DATE HEADER rows sticky until they get "scrolled away".

我该如何实现?我在粘性标头上看到了很多示例，但是没有实际的示例将此粘性"功能仅应用于表行.我的<table也放置在其自己的可滚动固定高度内，并且我希望页眉停留在<div>的顶部而不是top:0;

How can I achieve that? I see lots of examples on sticky headers but there's no actual one that applies this "sticky" feature to table rows only. My <table is also put within its own scrollable fixed height and I want the header to stick at the top of the <div> instead of at top:0;

我已将代码放在 http://codepen.io/anon/pen/zxpkr的笔中，现在我要修复colspan，因为我的<td>不会跨越单元格，并使<tr>粘在<div>的顶部.

I have put my code into a pen at http://codepen.io/anon/pen/zxpkr and now I am left with fixing the colspan because my <td> doesnt span across the cells, and getting the <tr> to stick at the top of the <div>.

推荐答案

我不得不用容器div包装可滚动的div，并稍微使用if语句，但这是可行的.

I had to wrap the scrollable div with a container div and play with the if statements a bit, but it works.

工作示例

JS

function stickyTitles(stickies) {
    this.load = function () {
        stickies.each(function () {
            var thisSticky = jQuery(this).wrap('<div class="followWrap" />');
            thisSticky.parent().height(thisSticky.outerHeight());
            jQuery.data(thisSticky[0], 'pos', thisSticky.offset().top);
        });
    };
    this.scroll = function () {
        stickies.each(function (i) {
            var thisSticky = jQuery(this),
                nextSticky = stickies.eq(i + 1),
                prevSticky = stickies.eq(i - 1),
                pos = jQuery.data(thisSticky[0], 'pos'),
                h = $('.mytable').offset().top;
            if (pos <= jQuery('.mytable').scrollTop() + h) {
                thisSticky.addClass("fixed");
                if (nextSticky.length > 0 && jQuery('.mytable').scrollTop() + h >= jQuery.data(thisSticky[0], 'pos') - prevSticky.outerHeight()) {
                    thisSticky.addClass("absolute").css("top", jQuery.data(nextSticky[0], 'pos') - $('.mytable').scrollTop() - prevSticky.outerHeight() - h);
                }
            } else {
                thisSticky.removeClass("fixed");
                if (prevSticky.length > 0 && jQuery('.mytable').scrollTop() + h <= jQuery.data(thisSticky[0], 'pos') - prevSticky.outerHeight()) {
                    prevSticky.removeClass("absolute").removeAttr("style");
                }
            }
        });
    };
}
jQuery(document).ready(function () {
    var newStickies = new stickyTitles(jQuery(".followMeBar"));
    newStickies.load();
    jQuery('.mytable').on("scroll", function () {
        newStickies.scroll();
    });
});

CSS

body {
    height:2000px;
    margin: 0;
    background: #333;
    color: #fff;
    overflow: auto;
}
table {
    width: 100%;
}
table tr {
    height: 100px;
}
.followMeBar {
    display: block;
    background: #222;
    border-bottom: solid 1px #111;
    border-top: solid 1px #444;
    position: relative;
    z-index: 1;
    width: 200%;
}
.followMeBar.fixed {
    position: absolute;
    top: 0;
    width: 90%;
    z-index: 0;
}
.followMeBar.fixed.absolute {
    position: absolute;
}
.mytable {
    overflow-y: scroll;
    height: 250px;
}
#hidden {
    overflow:hidden;
    position:absolute;
    width:100%;
}

HTML

<h1>Test</h1>

<p>My table in a div below...</p>
<div id="hidden">
    <div class='mytable'>
        <table>
            <tr class='followMeBar'>
                <td colspan="4">12-07-2013</td>
            </tr>
            <tr>
                <td>4:35 PM</td>
                <td>1729</td>
                <td>2</td>
                <td>jack</td>
            </tr>
            <tr>
                <td>4:40 PM</td>
                <td>KSKS</td>
                <td>4</td>
                <td>jason</td>
            </tr>
            <tr>
                <td>5:35 PM</td>
                <td>1714</td>
                <td>4</td>
                <td>raymond</td>
            </tr>

        etc...

        </table>
    </div>
</div>

请注意，此方法基于此答案，我不得不稍作调整以使其起作用对于可滚动的div，但是我想在应归还的地方给予归因.

Please note that this method was based off of this answer, I had to adjust things a bit to make it work for a scrollable div, but I want to give credit where credit is due.

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