vue + less移动端自适应布局

还是可以写px,但是插件会自动转换,一般情况下,自适应还是不错的,但是模拟器换到ipad ,iPhone X,自适应效果好像就没有那么好(不知道是不是自己本身写的样式问题)

1.安装 postcss-px2rem px2rem-loader

$ npm install postcss-px2rem px2rem-loader --save-dev

2.配置 px2rem 单位

在 /build/utils.js 找到 
exports.cssLoaders = function (options) { ,
添加 px2remLoader,并在loaders中开发环境和生产环境都引用
要在原来的基础上添加这些,不然会无效
const loaders = options.usePostCSS ? [cssLoader, px2remLoader, postcssLoader] : [cssLoader, px2remLoader]
exports.cssLoaders = function (options) {
     
  options = options || {
     }

  const cssLoader = {
     
    loader: 'css-loader',
    options: {
     
      sourceMap: options.sourceMap
    }
  }

  const px2remLoader = {
     
    loader: 'px2rem-loader',
    options: {
     
      remUnit: 37.5			//以750px(iphone6)宽度为基准,所以remUnit为37.5
    }
  }

  const postcssLoader = {
     
    loader: 'postcss-loader',
    options: {
     
      sourceMap: options.sourceMap
    }
  }

  // generate loader string to be used with extract text plugin
  function generateLoaders (loader, loaderOptions) {
     
    const loaders = options.usePostCSS ? [cssLoader, px2remLoader, postcssLoader] : [cssLoader, px2remLoader]

3、在static目录中建立js文件夹,建立flex.js文件,放入以下代码,并在main.js中引用

(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 = 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';
} 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'] = {
     }));

关注公众号:大明贵妇,无套路获取前端学习资料,期待各位客官来临
vue + less移动端自适应布局_第1张图片

你可能感兴趣的:(vue,vue.js)