html - CSS 内联/ block 问题

Question

我在使用 <span> 时遇到了 css 内联/ block 问题标签。

正如您从图片中看到的，当您将鼠标悬停在第三条消息上时，会弹出删除/回复控件，我不希望它们将内容下推。我怎样才能做到这一点？

这是我的CSS代码:

ul.inbox {
    width: 100%;
    list-style-type: none;
}

.unread {
    border: 1px solid #999 !important;
    background: #eee url("new.png") no-repeat !important;
    background-position: left center !important;
}

li span.hidden {
    clear: both;
    visibility: hidden;
}

li span.messageControls {
    clear: both;
    float: right;
    display: inline;
}

li span.messageControls a {
    padding: 5px 5px 0 0;
    font-size: 12px;
    color: #06c;
}

li.message {
    background: #eee;
    border: 1px solid #ddd;
    list-style-type: none;
    display: block;
    margin: 0 0 10px;
    padding-left: 30px;
    background-position: left center;
}

li.message:hover {

}

li.message a {
    text-decoration: none;
}

li {
    overflow: hidden;
}

li span.from {
    margin: 5px 0 5px 5px;
    font-family:"Open Sans",sans-serif;
    font-size: 14px;
    color: #666;
    float: left;
    font-weight: 700;
}

li span.date {
    margin: 5px 5px 5px 0;
    font-size: 12px;
    float: right;
    color: #06c;
}

li p.subject {
    margin: 5px 0 5px 5px;
    font-size: 14px;
    color: #666;
    clear: both;
    font-weight: 700;
}

li p.preview {
    margin: 5px 0 5px 5px;
    font-size: 12px;
    color: #999;
}

还有我的“收件箱”代码:

<ul class="inbox">
    <li id="1001843" class="message " onmouseout="document.getElementById('1001843MC').className='hidden'" onmouseover="document.getElementById('1001843MC').className='messageControls'" onclick="ajaxMessage(1001843);">
        <span class="from">Michael‌·Norris</span> <span class="date">Yesterday‌·21:18</span> <span id="1001843MC" class="hidden"><a href="compose.php?id=&to=">Reply</a> &nbsp; <a href="update.php?id=&action">Delete</a></span>

        <p class="subject">gjhgjhg</p>

        <p class="preview">jhgjhgjhg</p>
    </li>

    <li id="1001842" class="message " onmouseout="document.getElementById('1001842MC').className='hidden'" onmouseover="document.getElementById('1001842MC').className='messageControls'" onclick="ajaxMessage(1001842);">
        <span class="from">Michael‌·Norris</span> <span class="date">Yesterday‌·21:18</span> <span id="1001842MC" class="hidden"><a href="compose.php?id=&to=">Reply</a> &nbsp; <a href="update.php?id=&action">Delete</a></span>

        <p class="subject">gfhjgjfdhsgf</p>

        <p class="preview">gj‌·hg</p>
    </li>

    <li id="1001841" class="message " onmouseout="document.getElementById('1001841MC').className='hidden'" onmouseover="document.getElementById('1001841MC').className='messageControls'" onclick="ajaxMessage(1001841);">
        <span class="from">Michael‌·Norris</span> <span class="date">Yesterday‌·20:17</span> <span id="1001841MC" class="hidden"><a href="compose.php?id=&to=">Reply</a> &nbsp; <a href="update.php?id=&action">Delete</a></span>

        <p class="subject">gjhgjhg</p>

        <p class="preview">jhgjhgjhg</p>
    </li>
</ul>

在这里 fiddle :http://jsfiddle.net/Er73L/

Answer 1

您需要正确设置 clear 属性以实现您想要的行为，而不是盲目地使用 clear: both。

我对您的 CSS 做了两处更改:

li span.messageControls {
    clear: right; /* was clear: both; */
    float: right;
    display: block; /* was display: inline */
}

li p.subject {
    margin: 5px 0 5px 5px;
    font-size: 14px;
    color: #666;
    clear: left; /* was clear: both; */
    font-weight: 700;
}

这是一个 working example .我还建议您阅读 documentation .