目标：在做菜单权限的时候需要选择图标，如果既想要用elementUI自带的图标，还想要自定义的图标，这时就需要二者结合一下

如果用的是vue-admin-template，那svg组件和引入elementUI是不需要操作的，直接使用即可。步骤直接跳到最后就行

一、封装组件svg

src/components/Svgicon/index.vue

<template>
  <div v-if="isExternal" :style="styleExternalIcon" class="svg-external-icon svg-icon" v-on="$listeners" />
  <svg v-else :class="svgClass" aria-hidden="true" v-on="$listeners">
    <use :xlink:href="iconName" />
  </svg>
</template>

<script>
// doc: https://panjiachen.github.io/vue-element-admin-site/feature/component/svg-icon.html#usage
import { isExternal } from '@/utils/validate'

export default {
  name: 'SvgIcon',
  props: {
    iconClass: {
      type: String,
      required: true
    },
    className: {
      type: String,
      default: ''
    }
  },
  computed: {
    isExternal() {
      return isExternal(this.iconClass)
    },
    iconName() {
      return `#icon-${this.iconClass}`
    },
    svgClass() {
      if (this.className) {
        return 'svg-icon ' + this.className
      } else {
        return 'svg-icon'
      }
    },
    styleExternalIcon() {
      return {
        mask: `url(${this.iconClass}) no-repeat 50% 50%`,
        '-webkit-mask': `url(${this.iconClass}) no-repeat 50% 50%`
      }
    }
  }
}
</script>

<style scoped>
.svg-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
  overflow: hidden;
}

.svg-external-icon {
  background-color: currentColor;
  mask-size: cover!important;
  display: inline-block;
}
</style>

src/components/Svgicon/requireIcon.js

const req = require.context("../../icons/svg", false, /\.svg$/);
const requireAll = (requireContext) => requireContext.keys();

const re = /\.\/(.*)\.svg/;

const icons = requireAll(req).map((i) => {
  return i.match(re)[1];
});

export default icons;

二、创建icons

src/icons/svg

这个是放svg图片的地方

src/icons/index.js

import Vue from "vue";
import SvgIcon from "@/components/SvgIcon"; // svg component

// register globally
Vue.component("svg-icon", SvgIcon);

const req = require.context("./svg", false, /\.svg$/);
const requireAll = (requireContext) =>
  requireContext.keys().map(requireContext);
requireAll(req);

src/icons/svgo.yml

# replace default config

# multipass: true
# full: true

plugins:

  # - name
  #
  # or:
  # - name: false
  # - name: true
  #
  # or:
  # - name:
  #     param1: 1
  #     param2: 2

- removeAttrs:
    attrs:
      - 'fill'
      - 'fill-rule'

三、封装elementUI的图标

1、引入elementUI的css

src/main.js

import "element-ui/lib/theme-chalk/index.css";

2、封装组件

src/components/iconChoose/index.vue

<template>
  <div id="ico"></div>
</template>

<script>
export default {

}
</script>

<style></style>

3、把所需要的elementUI的图标放入js文件中

src/components/iconChoose/icon.js

export const menuicon = [
  "el-icon-s-tools",
  "el-icon-more",
  "el-icon-s-grid",
  "el-icon-s-data",
  "el-icon-present",
  "el-icon-set-up",
  "el-icon-location-outline",
  "el-icon-goods",
  "el-icon-video-camera",
  "el-icon-s-fold",
  "el-icon-s-unfold",
  "el-icon-s-operation",
  "el-icon-s-promotion",
  "el-icon-s-home",
  "el-icon-s-release",
  "el-icon-s-ticket",
  "el-icon-s-management",
  "el-icon-s-open",
  "el-icon-menu",
  "el-icon-s-check",
  "el-icon-s-custom",
  "el-icon-s-opportunity",
  "el-icon-date",
  "el-icon-printer",
  "el-icon-mobile",
  "el-icon-film",
  "el-icon-collection",
  "el-icon-files",
  "el-icon-notebook-1",
  "el-icon-notebook-2",
  "el-icon-shopping-cart-full",
  "el-icon-coin",
  "el-icon-chat-dot-round",
  "el-icon-bangzhu",
  "el-icon-odometer",
  "el-icon-crop",
  "el-icon-delete-location",
  "el-icon-medal",
  "el-icon-message",
  "el-icon-discount",
  "el-icon-office-building",
  "el-icon-receiving",
];

四、页面使用

<template>
  <div id="Menu" class="Menu-container">
        <el-form
          ref="menusForm"
          :rules="menusrules"
          :model="menusForm"
          label-position="right"
          label-width="120px"
          size="small"
        >
          <el-form-item label="菜单图标" prop="ico">
            <el-popover
              popper-class="icon"
              placement="right"
              width="400"
              height="200"
              trigger="focus"
            >
              <ul class="ul-icon">
                <li
                  v-for="(icon, index) in incondata"
                  :key="icon"
                  class="li-icon"
                  @click="geticon(icon, index)"
                >
                  <i class="i-icon-choose" :class="icon" />
                  <svg-icon
                    :icon-class="icon"
                    style="height: 30px; width: 16px"
                  />
                </li>
              </ul>
              <el-input
                slot="reference"
                v-model="menusForm.ico"
                clearable
                class="inputsize"
                @focus="iconChoose"
              >
                <i
                  v-if="menusForm.ico.substr(0, 7) === 'el-icon' ? true : false"
                  slot="prefix"
                  :class="menusForm.ico"
                ></i>
                <svg-icon
                  v-else
                  slot="prefix"
                  :icon-class="menusForm.ico"
                  style="height: 14px; width: 14px; margin-top: 10px"
                />
              </el-input>
            </el-popover>
          </el-form-item>
        </el-form>
      </div>
  </div>
</template>

<script>
import { menuicon } from "@/src/components/iconChoose/icon.js";
import icons from "@/components/SvgIcon/requirelcons";
import SvgIcon from "@/components/SvgIcon/index.vue";

export default {
  name: "Menu",
  components: { SvgIcon },
  data() {
    return {
      incondata: "", // 图标选择
    };
  },
  created() {
    this.getMenuList();
    this.GetAllMenuList();
  },
  methods: {
    // 选择图标,输入框聚焦时触发
    iconChoose() {
      // 自定义的svg和elementUI提供的结合一起使用
      this.incondata = [...icons, ...menuicon];
    },
    // 获取图标的值
    geticon(icon, index) {
      this.menusForm.ico = icon;
    },
  },
};
</script>
<style lang="scss" scoped>
li {
  list-style: none;
}
.choose-icon {
  text-align: center;
  font-size: 16px;
  line-height: 16px;
  color: #17163c;
  margin-top: 5px;
  margin-bottom: 5px;
}
.ul-icon {
  display: flex;
  flex-wrap: wrap;
  padding: 5px 0;
  margin: 0;
  justify-content: center;
}
.ul-icon {
  .li-icon {
    width: 44px;
    height: 44px;
    text-align: center;
    line-height: 44px;
    i {
      font-size: 18px;
    }
  }
  .li-icon:hover {
    background-color: #f1f3f4;
  }
}
</style>

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