Html 为什么不让边距：自动居中图像？
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Why doesn't margin:auto center an image?
提问by Joe Phillips
<html>
<head>
<title>Test</title>
</head>
<body>
<div>
<img src="queuedError.jpg" style="margin:auto; width:200px;" />
</div>
</body>
</html>
The divexpands to 100% as it should but the image does not center itself. Why?
在div100％扩展，因为它应该，但图像没有中心本身。为什么？
回答by Keltex
Because your image is an inline-block element. You could change it to a block-level elementlike this:
因为您的图像是内联块元素。您可以将其更改为块级元素，如下所示：
<img src="queuedError.jpg" style="margin:auto; width:200px;display:block" />
and it will be centered.
它将居中。
回答by TheDeadMedic
You need to render it as block level;
您需要将其渲染为块级；
img {
display: block;
width: auto;
margin: auto;
}
回答by Pranay Rana
Add style="text-align:center;"
添加 style="text-align:center;"
try below code
试试下面的代码
<html>
<head>
<title>Test</title>
</head>
<body>
<div style="text-align:center;vertical-align:middle;">
<img src="queuedError.jpg" style="margin:auto; width:200px;" />
</div>
</body>
</html>
回答by Ryan Hollingsworth
i know this is an old post, but wanted to share how i solved the same problem.
我知道这是一个旧帖子，但想分享我如何解决同样的问题。
My image was inheriting a float:left from a parent class. By setting float:none I was able to make margin:0 auto and display: block work properly. Hope it may help someone in the future.
我的图像从父类继承了一个 float:left 。通过设置 float:none 我能够使 margin:0 auto 和 display: block 正常工作。希望它可以在未来帮助某人。
回答by Catwoman
I've found that I must define a specific width for the object or nothing else will make it center. A relative width doesn't work.
我发现我必须为对象定义一个特定的宽度，否则其他任何东西都不会使其居中。相对宽度不起作用。
回答by Dino
I have found... margin: 0 auto; works for me. But I have also seen it NOT work due to the class being trumped by another specificity that had ... float:left; so watch for that you may need to add ... float:none; this worked in my case as I was coding a media query.
我发现... margin: 0 auto; 为我工作。但我也看到它不起作用，因为该类被另一个具有 ... float:left; 的特殊性所压倒。所以请注意您可能需要添加 ... float:none; 这在我的情况下有效，因为我正在编写媒体查询。
回答by Salil
<div style="text-align:center;">
<img src="queuedError.jpg" style="margin:auto; width:200px;" />
</div>
回答by Hamd Islam
open divthen put
打开div然后放
style="width:100% ; margin:0px auto;"
imagetag (or) content
image标记（或）内容
close div
关闭div
