刚开始Vue项目中用了Container容器，运行之后，页面上容器的header距离浏览器的顶部有一段距离，然后找到了App.vue的样式，把（margin-top:60px）去掉了。之后运行发现依然有距离，只不过顶部的距离确实缩小了，这时候四周的距离是一样的
之后百度了一个方法，试了试，发现成功了
参考：vue项目自适应屏幕和浏览器
1、安装依赖
npm i lib-flexible -S
npm i px2rem-loader -S
2、在src文件夹下新建utils文件夹，在utils文件夹下新建flexible.js,代码如下：（全部复制，不要忘记格式化）
(function () { // flexible.css var cssText = "" + '@charset "utf-8";html{color:#000;background:#fff;overflow-y:scroll;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;-webkit-overflow-scrolling:touch}html *{outline:0;-webkit-text-size-adjust:none;-webkit-tap-highlight-color:transparent}body,html{font-family:"Microsoft YaHei",sans-serif,Tahoma,Arial}article,aside,blockquote,body,button,code,dd,details,div,dl,dt,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,hr,input,legend,li,menu,nav,ol,p,pre,section,td,textarea,th,ul{margin:0;padding:0;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}input,input[type=button],input[type=reset],input[type=submit]{resize:none;border:none;-webkit-appearance:none;border-radius:0}input,select,textarea{font-size:100%}table{border-collapse:collapse;border-spacing:0}fieldset,img{border:0}abbr,acronym{border:0;font-variant:normal}del{text-decoration:line-through}address,caption,cite,code,dfn,em,th,var{font-style:normal;font-weight:500}ol,ul{list-style:none}caption,th{text-align:left}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:500}q:after,q:before{content:\'\'}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sup{top:-.5em}sub{bottom:-.25em}a:hover{text-decoration:underline}a,ins{text-decoration:none}a:active,a:hover,a:link,a:visited{background:0 0;-webkit-tap-highlight-color:transparent;-webkit-tap-highlight-color:transparent;outline:0;text-decoration:none}'; // cssText end var styleEl = document.createElement("style"); document.getElementsByTagName("head")[0].appendChild(styleEl); if (styleEl.styleSheet) { if (!styleEl.styleSheet.disabled) { styleEl.styleSheet.cssText = cssText; } } else { try { styleEl.innerHTML = cssText; } catch (e) { styleEl.innerText = cssText; } } })(); (function (win, lib) { var doc = win.document; var docEl = doc.documentElement; var metaEl = doc.querySelector('meta[name="viewport"]'); var flexibleEl = doc.querySelector('meta[name="flexible"]'); var dpr = 0; var scale = 0; var tid; var flexible = lib.flexible || (lib.flexible = {}); if (metaEl) { console.warn("将根据已有的meta标签来设置缩放比例"); var match = metaEl .getAttribute("content") .match(/initial\-scale=([\d\.]+)/); if (match) { scale = parseFloat(match[1]); dpr = parseInt(1 / scale); } } else if (flexibleEl) { var content = flexibleEl.getAttribute("content"); if (content) { var initialDpr = content.match(/initial\-dpr=([\d\.]+)/); var maximumDpr = content.match(/maximum\-dpr=([\d\.]+)/); if (initialDpr) { dpr = parseFloat(initialDpr[1]); scale = parseFloat((1 / dpr).toFixed(2)); } if (maximumDpr) { dpr = parseFloat(maximumDpr[1]); scale = parseFloat((1 / dpr).toFixed(2)); } } } if (!dpr && !scale) { var isAndroid = win.navigator.appVersion.match(/android/gi); var isIPhone = win.navigator.appVersion.match(/iphone/gi); var devicePixelRatio = win.devicePixelRatio; if (isIPhone) { // iOS下，对于2和3的屏，用2倍的方案，其余的用1倍方案 if (devicePixelRatio >= 3 && (!dpr || dpr >= 3)) { dpr = 3; } else if (devicePixelRatio >= 2 && (!dpr || dpr >= 2)) { dpr = 2; } else { dpr = 1; } } else { // 其他设备下，仍旧使用1倍的方案 dpr = 1; } scale = 1 / dpr; } docEl.setAttribute("data-dpr", dpr); if (!metaEl) { metaEl = doc.createElement("meta"); metaEl.setAttribute("name", "viewport"); metaEl.setAttribute( "content", "initial-scale=" + scale + ", maximum-scale=" + scale + ", minimum-scale=" + scale + ", user-scalable=no" ); if (docEl.firstElementChild) { docEl.firstElementChild.appendChild(metaEl); } else { var wrap = doc.createElement("div"); wrap.appendChild(metaEl); doc.write(wrap.innerHTML); } } function refreshRem() { var width = docEl.getBoundingClientRect().width; if (width / dpr > 540) { width = width * dpr; } var rem = width / 10; docEl.style.fontSize = rem + "px"; flexible.rem = win.rem = rem; } win.addEventListener( "resize", function () { clearTimeout(tid); tid = setTimeout(refreshRem, 300); }, false ); win.addEventListener( "pageshow", function (e) { if (e.persisted) { clearTimeout(tid); tid = setTimeout(refreshRem, 300); } }, false ); if (doc.readyState === "complete") { doc.body.style.fontSize = 12 * dpr + "px"; } else { doc.addEventListener( "DOMContentLoaded", function (e) { doc.body.style.fontSize = 12 * dpr + "px"; }, false ); } refreshRem(); flexible.dpr = win.dpr = dpr; flexible.refreshRem = refreshRem; flexible.rem2px = function (d) { var val = parseFloat(d) * this.rem; if (typeof d === "string" && d.match(/rem$/)) { val += "px"; } return val; }; flexible.px2rem = function (d) { var val = parseFloat(d) / this.rem; if (typeof d === "string" && d.match(/px$/)) { val += "rem"; } return val; }; })(window, window["lib"] || (window["lib"] = {}));
3、在main.js中引入flexible.js
import './utils/flexible.js'
4、修改build下的utils.js
const px2remLoader = {
loader: 'px2rem-loader',
options: {
remUnit: 192
}
}
const loaders = options.usePostCSS ? [cssLoader, postcssLoader, px2remLoader] : [cssLoader, px2remLoader]
5、启动项目即可
6、可能会有一个问题，就是右侧会出现滚动条
解决办法：找到index.html，给html标签加overflow：hidden