移动端1px适配问题
Retina屏幕,设备像素比,移动端的边框在这些屏幕上1px 会表现处2px,3px像素的宽度,所以出现各种解决方案,今天只总结一种,以后慢慢补充。。通过伪类 ::after。,原理就是通过transfrom:scaleX scale scaleY这几个函数进行缩放,废话不多说,直接撸代码,分别是:底边,上边,左边,右边,还有四个边框都有,在文章末尾有相关知识的介绍链接,本文就不会浪费文字在这些方面了。
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>移动端1px</title> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"> <style> div { text-align: center; margin: 0 auto; } p { text-align: center; } .border-bottom-1px, .border-top-1px, .border-left-1px, .border-right-1px { width: 50px; height: 50px; } /*移动端1px解决方案*/ .border-1px, .border-bottom-1px, .border-top-1px, .border-left-1px, .border-right-1px { width: 100px; height: 100px; position: relative; } /*线条颜色 黑色*/ .border-bottom-1px::after, .border-top-1px::after, .border-left-1px::after, .border-right-1px::after { background-color: #000; } /*底边边框一像素*/ .border-bottom-1px::after { content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px; transform-origin: 0 0; } /*上边边框一像素*/ .border-top-1px::after { content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 1px; transform-origin: 0 0; } /*左边边框一像素*/ .border-left-1px::after { content: ""; position: absolute; left: 0; top: 0; width: 1px; height: 100%; transform-origin: 0 0; } /*右边边框1像素*/ .border-right-1px::after { content: ""; box-sizing: border-box; position: absolute; right: 0; top: 0; width: 1px; height: 100%; transform-origin: 0 0; } /*边框一像素*/ .border-1px::after { content: ""; box-sizing: border-box; position: absolute; left: 0; top: 0; width: 100%; height: 100%; border: 1px solid red; } /*设备像素比*/ @media only screen and (-webkit-min-device-pixel-ratio: 2.0), only screen and (min-resolution: 2dppx) { .border-bottom-1px::after, .border-top-1px::after { transform: scaleY(0.5); } .border-left-1px::after, .border-right-1px::after { transform: scaleX(0.5); } .border-1px::after { width: 200%; height: 200%; transform: scale(0.5); transform-origin: 0 0; } } /*设备像素比*/ @media only screen and (-webkit-min-device-pixel-ratio: 3.0), only screen and (min-resolution: 3dppx) { .border-bottom-1px::after, .border-top-1px::after { transform: scaleY(0.333); } .border-left-1px::after, .border-right-1px::after { transform: scaleX(0.333); } .border-1px::after { width: 300%; height: 300%; transform: scale(0.333); transform-origin: 0 0; } } </style> </head> <body> <p>1, 1px border</p> <div class="border-1px"></div> <p>2, 1px left border</p> <div class="border-left-1px"></div> <p>3, 1px top border</p> <div class="border-top-1px"></div> <p>4, 1px right border</p> <div class="border-right-1px"></div> <p>5, 1px bottom border</p> <div class="border-bottom-1px"></div> </body> </html>
如果好奇设备像素比,可以去看张鑫旭老师的博客:设备像素比devicePixelRatio简单介绍
如果好奇其它的解决方案,可以去看另外博客的文章:移动端1px解决方案
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