Vue不同分辨率大小下的屏幕适配

亲测可用

安装

npm i lib-flexible
npm i postcss-px2rem-exclude

utils文件夹下创建rem.js

复制以下全部代码

(function() {
  // flexible.css
  let 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

  let 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) {
  let doc = win.document;
  let docEl = doc.documentElement;
  let metaEl = doc.querySelector('meta[name="viewport"]');
  let flexibleEl = doc.querySelector('meta[name="flexible"]');
  let dpr = 0;
  let scale = 0;
  let tid;
  let 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');
    let match = metaEl.getAttribute('content').match(/initial\-scale=([\d\.]+)/);
    if (match) {
      scale = parseFloat(match[1]);
      dpr = parseInt(1 / scale);
    }
  } else if (flexibleEl) {
    let content = flexibleEl.getAttribute('content');
    if (content) {
      let initialDpr = content.match(/initial\-dpr=([\d\.]+)/);
      let 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) {
    let isAndroid = win.navigator.appVersion.match(/android/gi);
    let isIPhone = win.navigator.appVersion.match(/iphone/gi);
    let { devicePixelRatio } = win;
    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 {
      let wrap = doc.createElement('div');
      wrap.appendChild(metaEl);
      doc.write(wrap.innerHTML);
    }
  }

  function refreshRem() {
    let { width } = docEl.getBoundingClientRect();
    if (width / dpr > 540) {
      width *= dpr;
    }
    let rem = width / 10;
    docEl.style.fontSize = `${rem}px`;
    flexible.rem = win.rem = rem;
  }

  win.addEventListener(
    'resize',
    () => {
      clearTimeout(tid);
      tid = setTimeout(refreshRem, 300);
    },
    false
  );
  win.addEventListener(
    'pageshow',
    (e) => {
      if (e.persisted) {
        clearTimeout(tid);
        tid = setTimeout(refreshRem, 300);
      }
    },
    false
  );

  if (doc.readyState === 'complete') {
    doc.body.style.fontSize = `${12 * dpr}px`;
  } else {
    doc.addEventListener(
      'DOMContentLoaded',
      (e) => {
        doc.body.style.fontSize = `${12 * dpr}px`;
      },
      false
    );
  }

  refreshRem();

  flexible.dpr = win.dpr = dpr;
  flexible.refreshRem = refreshRem;
  flexible.rem2px = function(d) {
    let val = parseFloat(d) * this.rem;
    if (typeof d === 'string' && d.match(/rem$/)) {
      val += 'px';
    }
    return val;
  };
  flexible.px2rem = function(d) {
    let val = parseFloat(d) / this.rem;
    if (typeof d === 'string' && d.match(/px$/)) {
      val += 'rem';
    }
    return val;
  };
})(window, window.lib || (window.lib = {}));

main.js引入import utils/rem.js

main.js引入import ‘lib-flexible’;

Vuec-li3下package.json添加

前面有个逗号

  ,"postcss": {
    "plugins": {
      "autoprefixer": {},
      "postcss-px2rem-exclude": {
        "remUnit": 192,//设计稿的分辨率/10
        "exclude": "/node_modules|floder_name/i"
      }
    }
  }

注：
对需要控制高度的模块进行高度绑定

  computed: {
    // 最大滚动距离
    scrollTopLength() {
      return document.documentElement.scrollHeight - document.documentElement.clientHeight;
    },
    // 获取可视区域的高度
    clientHeight() {
      return `${document.documentElement.clientHeight}px`;
    },
  },