根据字体大小调整图像大小 [英] Adjust image size based on the font size

问题描述

我正在整理一个HTML页面，以便在手机和PC/Mac中都可以查看.在文字中，有时会有嵌入式图像:

I am putting together an HTML page to be viewed in both mobile phones and PC/Mac. In the text, I sometimes have inline images:

<p>to do that, then press on button <img src="button.png" /> for 2 seconds</p>

我的字体以em或％大小调整，因此在低分辨率电话和高分辨率电话上都可以读取.问题是我的按钮(通常为32像素高的图像)在高分辨率手机上显得太小了.

My fonts are sized in em or % so it is readable on both low res-phones and high-res phones. The issue is that my buttons (usually 32px high images) appear so tiny on high-res phones.

如何调整图像尺寸?最好是纯CSS，但JS还是可以的.

How do I adjust the image size? Preferably pure CSS, but JS is still OK.

推荐答案

如果在<p>标签中设置字体大小，则应该只能在p img上使用height: 1em;设置图像的大小.字体的高度.

If you set the size of your font in the <p> tag, you should just be able to use height: 1em; on p img to set the image's height to that of the font.

这是一个 jsfiddle 以显示我的意思:

Here's a jsfiddle to show what I mean:

body {
  font-size: 62.5%;
  /*sets 1em to 10px for convenience*/
}

p {
  font-size: 3em;
}

p img {
  height: 1em;
  width: auto;
}

<p>Hello world! <img src="http://images.wikia.com/dragonvale/images/e/e8/Space_invader.jpg"></p>

如果您希望它的大小是字体的两倍，则只需将图像的高度设置为2em.

And if you want it to be double the size of the font, you'd just set the height of the image to 2em.

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