Vue2.0實現自適應解析度
阿新 • • 發佈:2021-11-28
本文例項為大家分享了2.0實現自適應解析度的具體程式碼,供大家參考,具體內容如下
1. 前臺框架:Vue2.0+elementUI 2.15.7
2. 開發工具:vs code
3. 安裝所需架包:
"post-import": "12.0.1",
"postcss-loader": "4.0.1YXNzw",
"postcss-pxtorem": "^5.1.1",
檢查是否安裝“flexible”架包,安裝了需解除安裝或者取消引用,該架包檔案會和修改過的“flexible”檔案衝突。
4. 建立flexibleEx.檔案(該檔案是修改flexible架包的flexible.js檔案,可以根據需求自行修改),放置在所需要的隨意位置,如:“/src/utils”目錄下面。
然後將“flexibleEx.js”引入到“main.js”中,如:
import '@/utils/flexibleEx.js'
檔案程式碼:
(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 |www.cppcns.com| (lib.flexible = {}) if (metaEl) { console.warn('將根據已有的meta標籤來設定縮放比例') 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 is = win.navigator.appVersion.match(/android/gi) var isIPhone = win.navigator.appVersion.match(/iphone/gi) var devicePixelRatio = win.devicePixelRatio if (isIPhone) { // iOS下,對於2和3的屏,用2倍的方案,其餘的用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 { // 其他裝置下,仍舊使用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() { const whiteList = [ '/managementKanban','/productionKanban','/controlBoard','/main' ] // 不重定向白名單路由 var width = docEl.getBoundingClientRect().width var rem = 0 var hrefList = window.location.href.split('/') var url = hrefList[hrefList.length - 1] var url0 = url.split('?') var urlEnd if (url0.length > 0) { urlEnd = url0[0] } if (!whiteList.includes('/' + urlEnd)) { if (width / dpr <= 1980 && width / dpr > 768) { width = 1980 * dpr rem = width / 48 } else if (width / dpr >= 5760) { width = 5760 * dpr rem = width / 48 } else { width = 540 * dpr rem = width / 20 } docEl.style.fontSize = rem + 'px' flexible.rem = win.rem = rem } } win.addEventListener( 'resize',function() { clearTimeout(tid) tid = setTimeout(refreshRem,300) },false ) win.addEventListener( 'DOMNodeInserted',50) },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'] = {}))
5. 修改“build/utitls.js”檔案,新增程式碼:
function generateLoaders(loader,loaderOptions) { const loaders = options.usePostCSS ? [cssLoader] : [cssLoader]; if (loader) { loaders.push({ loader: loader + "-loader",options: Object.assign({},loaderOptions,{ sourceMap: options.sourceMap }) }); } // Extract CSS when that option is specified // (which is the case during production build) if (options.extract) { return ExtractTextPlugin.extract({ use: loaders,fallback: "vue-style-loader",publicPath: "../../" }); } else { return ["vue-style-loader"].concat(loaders); } }
6. 修改更目錄下面“postcssrc.js”
module.exports = { plugins: { 'autoprefixer': { overrideBrowserslist: [ 'Android 4.1','iOS 7.1','Chrome > 31','ff > 31','ie >= 8' ] },'postcss-pxtorem': { rootValue: 37.5,propList: ['*'] } } }
7. 注:介面自適應問題已經解決,但是介面呈現還會出現一些問題,現在需要自行修改異常介面,介面開發儘量使用rem,樣式儘量不要使用內聯樣式,這些都需要手動修改
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。