如何在包含的内容中对齐图像div
?
Example
在我的示例中,我需要将<img>
in the <div>
with class ="frame
":
<div class="frame" style="height: 25px;">
<img src="http://jsfiddle.net/img/logo.png" />
</div>
.frame
的高度是固定的,图像的高度未知。我可以添加新元素.frame
如果这是唯一的解决方案。我正在尝试在 Internet Explorer 7 及更高版本、WebKit、Gecko 上执行此操作。
请参阅 jsfiddlehere http://jsfiddle.net/4RPFa/61/.
.frame {
height: 25px; /* Equals maximum image height */
line-height: 25px;
width: 160px;
border: 1px solid red;
text-align: center;
margin: 1em 0;
}
img {
background: #3A6F9A;
vertical-align: middle;
max-height: 25px;
max-width: 160px;
}
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=250 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=25 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=23 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=21 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=19 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=17 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=15 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=13 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=11 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=9 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=7 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=5 />
</div>
<div class=frame>
<img src="http://jsfiddle.net/img/logo.png" height=3 />
</div>
据我所知,唯一的(也是最好的跨浏览器)方法是使用inline-block
帮手与height: 100%
and vertical-align: middle
在这两个元素上。
所以有一个解决办法:http://jsfiddle.net/kizu/4RPFa/4570/ http://jsfiddle.net/kizu/4RPFa/4570/
.frame {
height: 25px; /* Equals maximum image height */
width: 160px;
border: 1px solid red;
white-space: nowrap; /* This is required unless you put the helper span closely near the img */
text-align: center;
margin: 1em 0;
}
.helper {
display: inline-block;
height: 100%;
vertical-align: middle;
}
img {
background: #3A6F9A;
vertical-align: middle;
max-height: 25px;
max-width: 160px;
}
<div class="frame">
<span class="helper"></span><img src="http://jsfiddle.net/img/logo.png" height=250px />
</div>
<div class="frame">
<span class="helper"></span><img src="http://jsfiddle.net/img/logo.png" height=25px />
</div>
<div class="frame">
<span class="helper"></span><img src="http://jsfiddle.net/img/logo.png" height=23px />
</div>
<div class="frame">
<span class="helper"></span><img src="http://jsfiddle.net/img/logo.png" height=21px />
</div>
<div class="frame">
<span class="helper"></span><img src="http://jsfiddle.net/img/logo.png" height=19px />
</div>
<div class="frame">
<span class="helper"></span>
<img src="http://jsfiddle.net/img/logo.png" height=17px />
</div>
<div class="frame">
<span class="helper"></span>
<img src="http://jsfiddle.net/img/logo.png" height=15px />
</div>
<div class="frame">
<span class="helper"></span>
<img src="http://jsfiddle.net/img/logo.png" height=13px />
</div>
<div class="frame">
<span class="helper"></span>
<img src="http://jsfiddle.net/img/logo.png" height=11px />
</div>
<div class="frame">
<span class="helper"></span>
<img src="http://jsfiddle.net/img/logo.png" height=9px />
</div>
<div class="frame">
<span class="helper"></span>
<img src="http://jsfiddle.net/img/logo.png" height=7px />
</div>
<div class="frame">
<span class="helper"></span>
<img src="http://jsfiddle.net/img/logo.png" height=5px />
</div>
<div class="frame">
<span class="helper"></span>
<img src="http://jsfiddle.net/img/logo.png" height=3px />
</div>
或者,如果您不想在现代浏览器中拥有额外的元素并且不介意使用 Internet Explorer 表达式,则可以使用伪元素并使用方便的表达式将其添加到 Internet Explorer,每个元素仅运行一次,所以不会有任何性能问题:
解决方案与:before
and expression()
对于 Internet Explorer:http://jsfiddle.net/kizu/4RPFa/4571/ http://jsfiddle.net/kizu/4RPFa/4571/
.frame {
height: 25px; /* Equals maximum image height */
width: 160px;
border: 1px solid red;
white-space: nowrap;
text-align: center;
margin: 1em 0;
}
.frame:before,
.frame_before {
content: "";
display: inline-block;
height: 100%;
vertical-align: middle;
}
img {
background: #3A6F9A;
vertical-align: middle;
max-height: 25px;
max-width: 160px;
}
/* Move this to conditional comments */
.frame {
list-style:none;
behavior: expression(
function(t){
t.insertAdjacentHTML('afterBegin','<span class="frame_before"></span>');
t.runtimeStyle.behavior = 'none';
}(this)
);
}
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=250px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=25px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=23px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=21px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=19px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=17px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=15px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=13px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=11px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=9px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=7px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=5px /></div>
<div class="frame"><img src="http://jsfiddle.net/img/logo.png" height=3px /></div>
怎么运行的:
-
当你有两个inline-block
元素彼此靠近,您可以将彼此对齐到另一侧,因此vertical-align: middle
你会得到这样的东西:
当你有一个固定高度的块时(在px
, em
或其他绝对单位),您可以设置内部块的高度%
.
- 所以,添加一个
inline-block
with height: 100%
在具有固定高度的块中将对齐另一个块inline-block
其中的元素(<img/>
在你的情况下)垂直靠近它。
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