我曾多次使用float:右(或左)将图像和嵌入框浮动在容器顶部。现在,我需要浮动一个div到另一个div的右下角与正常的文本包装,你得到的浮动(文本包装上面和左边只有)。
我认为这一定是相对容易的,即使浮动没有底部值,但我还没有能够做到这一点使用一些技术和搜索网络还没有出现任何其他使用绝对定位,但这并没有给出正确的换行行为。
我原以为这是一种很常见的设计,但显然不是。如果没有人有建议,我将不得不把我的文本分解成单独的盒子,并手动对齐div,但这是相当不稳定的,我不想在每个需要它的页面上都这样做。
到目前为止,Stu的答案是最接近工作的,但它仍然没有考虑到外部div的高度可能会根据文本在其中的换行方式而改变的事实。因此,只重新定位内部div(通过改变“pipe”的高度)一次是不够的。这种改变必须发生在循环内部,因此您可以不断检查是否已经达到了正确的定位,并在需要时进行重新调整。
前面答案中的CSS仍然完全有效:
#outer {
position: relative;
}
#inner {
float:right;
position:absolute;
bottom:0;
right:0;
clear:right
}
.pipe {
width:0px;
float:right
}
然而,Javascript应该看起来更像这样:
var innerBottom;
var totalHeight;
var hadToReduce = false;
var i = 0;
jQuery("#inner").css("position","static");
while(true) {
// Prevent endless loop
i++;
if (i > 5000) { break; }
totalHeight = jQuery('#outer').outerHeight();
innerBottom = jQuery("#inner").position().top + jQuery("#inner").outerHeight();
if (innerBottom < totalHeight) {
if (hadToReduce !== true) {
jQuery(".pipe").css('height', '' + (jQuery(".pipe").height() + 1) + 'px');
} else { break; }
} else if (innerBottom > totalHeight) {
jQuery(".pipe").css('height', '' + (jQuery(".pipe").height() - 1) + 'px');
hadToReduce = true;
} else { break; }
}
试试这个CSS+Javascript解决方案。从右上方的浮动div开始,然后计算一个零宽度的div的高度,沿着右边缘将浮动div推到底部。这段代码可能需要一些调整来获得正确的高度。
<style>
#mainbox {border:4px solid red;width:500px;padding:10px;}
.rightpad {float:right;clear:right;padding:0;width:0;}
#floater {background-color:red;text-align:center;color:#FFF;width:300px;height:100px;float:right;margin-right:-10px;margin-top:10px;}
</style>
<script>
window.onload = function() {
var mmheight = document.getElementById("mainbox").clientHeight;
var ff = document.getElementById("floater");
var ffheight = ff.clientHeight;
var dd = document.createElement('div');
dd.className = "rightpad";
dd.style.height = (mmheight - ffheight - 20) * 1 + "px";
ff.parentNode.insertBefore(dd,ff);
}
</script>
<div id="mainbox">
<div id="floater" class="rightpad">123</div>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam posuere tellus et dolor vestibulum gravida. Donec vel nunc massa. Quisque quis varius libero. Fusce ut elementum magna. Praesent hendrerit diam sed velit rutrum mollis. Nunc pretium metus in tempus tempus. Quisque laoreet nibh eget volutpat dictum. Pellentesque libero ipsum, tristique et aliquam aliquam, accumsan sed sem. Phasellus facilisis sem eget mi tempus rhoncus.</p></div>
浮动和绝对定位的组合对我来说很有用。我试图把消息的发送时间放在语音气泡的右下角。时间不应该与消息体重叠,除非真的有必要,否则它不会使气泡膨胀。
解决方案是这样的:
有两个跨度,文本完全相同;
一个漂浮着,但看不见;
另一个是绝对定位到角落;
不可见的浮动对象的目的是保证可见对象的空间。
.speech-bubble {
font-size: 16px;
max-width: 240px;
margin: 10px;
display: inline-block;
background-color: #ccc;
border-radius: 5px;
padding: 5px;
position: relative;
}
.inline-time {
float: right;
padding-left: 10px;
color: red;
}
.giant-text {
font-size: 36px;
}
.tremendous-giant-text {
font-size: 72px;
}
.absolute-time {
position: absolute;
color: green;
right: 5px;
bottom: 5px;
}
.hidden {
visibility: hidden;
}
<ul>
<li>
<span class='speech-bubble'>
This text is supposed to wrap the time <span> which always seats at the corner of this bubble.
<span class='inline-time'>13:55</span>
</span>
</li>
<li>
<span class='speech-bubble'>
Absolute positioning doesn't work because it doesn't care if the two pieces of text overlap. We want to float.
<span class='inline-time'>13:55</span>
</span>
</li>
<li>
<span class='speech-bubble'>
Easy, uh?
<span class='inline-time'>13:55</span>
</span>
</li>
<li>
<span class='speech-bubble'>
Well, not <span class='giant-text'>THAT</span>
easy
<span class='inline-time'>13:56</span>
</span>
</li>
<li>
<span class='speech-bubble'>
<span class='tremendous-giant-text'>See?</span>
<span class='inline-time'>13:56</span>
</span>
</li>
<li>
<span class='speech-bubble'>
The problem is, we can't tell the span to float to right AND bottom...
<span class='inline-time'>13:56</span>
</span>
</li>
<li>
<span class='speech-bubble'>
We can combinate float and absolute: use floated span to reserve space (the bubble will be inflated if necessary) so that the absoluted span is safe to go.
<span class='inline-time'>13:56</span>
</span>
</li>
<li>
<span class='speech-bubble'>
<span class='tremendous-giant-text'>See?</span>
<span class='inline-time'>13:56</span>
<span class='absolute-time'>13:56</span>
</span>
</li>
<li>
<span class='speech-bubble'>
Make the floated span invisible.
<span class='inline-time'>13:56</span>
</span>
</li>
<li>
<span class='speech-bubble'>
<span class='tremendous-giant-text'>See?</span>
<span class='inline-time hidden'>13:56</span>
<span class='absolute-time'>13:56</span>
</span>
</li>
<li>
<span class='speech-bubble'>
The giant text here is to simulate images which are common in a typical chat app.
<span class='tremendous-giant-text'>Done!</span>
<span class='inline-time hidden'>13:56</span>
<span class='absolute-time'>13:56</span>
</span>
</li>
</ul>