【vue3.0】2.0 某东到家（二）——CSS样式和图标：flex + iconfont

底部图标开发使用

https://www.iconfont.cn/
首先注册一个账号，然后在图标管理中点击我的项目：

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/* Logo 字体 */
@font-face {
  font-family: "iconfont logo";
  src: url('https://at.alicdn.com/t/font_985780_km7mi63cihi.eot?t=1545807318834');
  src: url('https://at.alicdn.com/t/font_985780_km7mi63cihi.eot?t=1545807318834#iefix') format('embedded-opentype'),
    url('https://at.alicdn.com/t/font_985780_km7mi63cihi.woff?t=1545807318834') format('woff'),
    url('https://at.alicdn.com/t/font_985780_km7mi63cihi.ttf?t=1545807318834') format('truetype'),
    url('https://at.alicdn.com/t/font_985780_km7mi63cihi.svg?t=1545807318834#iconfont') format('svg');
}

......

重点是这定义了一个iconfont的字体。
打开iconfont.css

@font-face {
  font-family: "custom-icon"; /* Project id 2672493 */
  src: url('iconfont.woff2?t=1626228339307') format('woff2'),
       url('iconfont.woff?t=1626228339307') format('woff'),
       url('iconfont.ttf?t=1626228339307') format('truetype');
}

.custom-icon {
  font-family: "custom-icon" !important;
  font-size: 16px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.custom-icon-shopping:before {
  content: "\e64c";
}

.custom-icon-order:before {
  content: "\e613";
}

.custom-icon-my:before {
  content: "\e600";
}

.custom-icon-home:before {
  content: "\e601";
}

项目中新建src\style\iconfont.scss,将内容粘贴过去：

@font-face {
  font-family: "custom-icon"; /* Project id 2672493 */
  src: url('./iconfont/iconfont.woff2?t=1626228339307') format('woff2'),
       url('./iconfont/iconfont.woff?t=1626228339307') format('woff'),
       url('./iconfont/iconfont.ttf?t=1626228339307') format('truetype');
}

.custom-icon {
  font-family: "custom-icon" !important;
  font-size: 16px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.custom-icon-shopping:before {
  content: "\e64c";
}

.custom-icon-order:before {
  content: "\e613";
}

.custom-icon-my:before {
  content: "\e600";
}

.custom-icon-home:before {
  content: "\e601";
}

将配置文件挪进目录：

image.png

使用，在main.js中修改：

import {
  createApp
} from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import 'normalize.css'
import './style/base.scss'
import './style/iconfont.scss'

createApp(App).use(store).use(router).mount('#app')

修改App.vue

<template>
  <div class="docker">
    <span class="docker__item">
      <div><i class="custom-icon custom-icon-home"></i></div>
      首页</span>
    <span class="docker__item">购物车</span>
    <span class="docker__item">订单</span>
    <span class="docker__item">我的</span>
  </div>
  <router-view />
</template>

<style lang="scss">
.docker {
  display: flex; //自适应均赠,弹性盒子
  position: absolute; //绝对定位
  box-sizing: border-box;//这个会以body的最外层作为容器的最外层
  padding: 0 .18rem;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0.49rem;
  border-top: 1px solid #f1f1f1;
}
.docker__item {
  flex: 1;
  text-align: center;
}
</style>

运行：

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上面是我喜欢的写法，当然也可以这样写：

......
   <span class="docker__item">
      <div class="custom-icon">&#xe601;</div>
      首页</span>
......

完善所有内容：

<template>
  <div class="docker">
    <span class="docker__item">
     <div><i class="custom-icon custom-icon-home"></i></div>
      首页</span>
    <span class="docker__item">
       <div><i class="custom-icon custom-icon-shopping"></i></div>
      购物车</span>
    <span class="docker__item">
       <div><i class="custom-icon custom-icon-order"></i></div>
      订单</span>
    <span class="docker__item">
       <div><i class="custom-icon custom-icon-my"></i></div>
      我的</span>
  </div>
  <router-view />
</template>
.....

image.png

调整一下大小：

<template>
  <div class="docker">
    <span class="docker__item docker__item--active">
      <div class="docker__item_icon">
        <i class="custom-icon custom-icon-home"></i>
      </div>
      <div class="docker__item__title">首页</div>
    </span>
    <span class="docker__item ">
      <div class="docker__item_icon">
        <i class="custom-icon custom-icon-shopping"></i>
      </div>
      <div class="docker__item__title">购物车</div>
    </span>
    <span class="docker__item ">
      <div class="docker__item_icon">
        <i class="custom-icon custom-icon-order"></i>
      </div>
      <div class="docker__item__title">订单</div>
    </span>
    <span class="docker__item ">
      <div class="docker__item_icon">
        <i class="custom-icon custom-icon-my"></i>
      </div>
      <div class="docker__item__title">我的</div>
    </span>
  </div>
  <router-view />
</template>

<style lang="scss">
.docker {
  display: flex; //自适应均赠,弹性盒子
  position: absolute; //绝对定位
  box-sizing: border-box; //这个会以body的最外层作为容器的最外层
  padding: 0 0.18rem;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0.49rem;
  border-top: 1px solid #f1f1f1;
}
.docker__item {
  flex: 1;
  text-align: center;
  .docker__item_icon {
    margin: 0.05rem 0 0.02rem 0; //图标距离上边距7px左右;
    font-size: 0.18rem;
  }
}
.docker__item--active{
  color: #1fA4FC;
}
.docker__item__title {
  //浏览器最小像素是12px，如果想表达12px以下的大小得如下编写
  font-size: 0.12rem;
  transform: scale(0.5 0.5); //横向缩小50% 纵向搜小50%
  transform-origin: center top; //缩放的中心店
}
</style>

效果如下：

image.png

这里的css命名规则采用BEM规范（block element modifier）
到此为止既然用了scss,那么css可以优化如下：

......
<style lang="scss">
.docker {
  display: flex; //自适应均赠,弹性盒子
  position: absolute; //绝对定位
  box-sizing: border-box; //这个会以body的最外层作为容器的最外层
  padding: 0 0.18rem;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0.49rem;
  border-top: 1px solid #f1f1f1;
  &__item {
    flex: 1;
    text-align: center;
    &_icon {
      margin: 0.05rem 0 0.02rem 0; //图标距离上边距7px左右;
      font-size: 0.18rem;
    }
    &--active {
      color: #1fa4fc;
    }
    &__title {
      //浏览器最小像素是12px，如果想表达12px以下的大小得如下编写
      font-size: 0.12rem;
      transform: scale(0.5 0.5); //横向缩小50% 纵向搜小50%
      transform-origin: center top; //缩放的中心店
    }
  }
}
</style>

现在还可以做如下优化，我们在main.js中会出现引入很多的css或者scss，那一些基础的css(scss)放入一个统一的管理文件，新增文件src\style\index.scss:

@import './base.scss';
@import './iconfont.scss';

这样main.js只需要引入一个文件：

import {
  createApp
} from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import 'normalize.css'
import './style/index.scss'

createApp(App).use(store).use(router).mount('#app')