vue项目处理dpr和多屏幕适配问题

<!DOCTYPE html>

<html style="font-size:37.5px">

<head>

  <meta charset="utf-8">

  <meta name="format-detection" content="telephone=no" >

  <meta name="apple-mobile-web-app-capable" content="yes">

  <meta name="apple-mobile-web-app-status-bar-style">

  <!--<meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=0">-->

  <title>快问中医</title>

  <style>

    html { /*消除click 300ms延迟*/

      touch-action: manipulation;

    }

    html, body {

      height: 100%;

      width: 100%;

      /*max-width: 580px;*/

      margin: 0 auto;

      overflow-x: hidden;

      overflow-y: hidden;

      background-color: #F0F0F0;

      font-family: Helvetica Neue, Helvetica, Arial, sans-serif !important;

    }

    * {

      box-sizing: border-box;

    }

  </style>

  <!-- 淘宝flexible方案 -->

  <script>

    (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;

//          }

        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 = 540 * 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';

        doc.body.style.fontSize = 16 + 'px'

      } else {

        doc.addEventListener('DOMContentLoaded', function (e) {

//            doc.body.style.fontSize = 12 * dpr + 'px';

          doc.body.style.fontSize = 16 + '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'] = {}))

  </script>

  <!-- 环境判断:测试、正式 -->

  <script>

    var host = window.location.host

    ;(function isFormalEnv(host){

      if(host.indexOf('kw13.cn') !== -1){

        window.isFormalEnv = true

        window.isTestEnv = false

      } else if(host.indexOf('kwmzy.com') !== -1) {

        window.isTestEnv = true

        window.isFormalEnv = false

      }

    })(host)

  </script>

  <!-- 腾讯移动统计配置 -->

  <script>

    var mtah5 = {}

    if(window.isFormalEnv){

      mtah5.sid = 500411881

      mtah5.cid = 500432840

    } else { // 本地、测试环境使用

      mtah5.sid = 500412096

      mtah5.cid = 500426037

    }

    var _mtac = {"performanceMonitor":1,"senseQuery":1};

    (function() {

      var mta = document.createElement("script");

      mta.setAttribute("name", "MTAH5");

      mta.setAttribute("sid", mtah5.sid);

      mta.setAttribute("cid", mtah5.cid);

      var s = document.getElementsByTagName("script")[0];

      s.parentNode.insertBefore(mta, s);

    })();

  </script>

  <script>

    window.origin = window.location.origin

  </script>

</head>

<body>

<div id="app"><!-- built files will be auto injected --></div>

</body>

</html>
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vue项目处理dpr和多屏幕适配问题

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