Vue弹出菜单功能的实现代码

.menu_container {
  position: absolute;
  z-index: 100;
  border-radius: 50%;
  transition-duration: 400ms;
  text-align: center;
  border: #efefef 3px solid;
  box-shadow: aliceblue 1px 1px 1px;
 }

 .menu_item {
  position: absolute;
  border-radius: 50%;
  z-index: 99;
  border: #efefef 3px solid;
  text-align: center;
  box-shadow: aliceblue 1px 1px 1px;
 }

<div>
  <div class="menu_container" ref="menuHome" @click="toggleMenu">
   <img :src="menuSrc"><!--menu图-->
  </div>
  <div class="menu_item" v-for="(item,index) in menuItems" :id="item.name" @click="clickMenu(item,index)">
   <img :src="item.src"><!--item图-->
  </div>
 </div>

export default {
  ...
  props: {//开放的属性，方便自定义
   menuSrc: {
    default: require('../assets/menu.png')
   },
   position: {
    default: 'LT'//可选择LT、LB、RT、RB4个角落
   },
   width: {
    default: 50,
   },
   baseDistance: {
    default: 150,
   },
   menuBg: {
    default: 'white'
   },
   itemBg: {
    default: 'white'
   },
   menuItems: {
    type: Array,
   }
  },
  data() {
   return {
    openFlag: false,//展开合并标志
    operators: ['+', '+'],//用于记录展开时动画XY方向
   }
  },
  mounted() {
   //根据props初始化各内容的各种style
   this.$refs.menuHome.style.width = this.width + 'px';
   this.$refs.menuHome.style.height = this.width + 'px';
   this.$refs.menuHome.style.lineHeight = this.width + 'px';
   this.$refs.menuHome.style.background = this.menuBg;
   this.menuItems.forEach((item) => {
    let el = document.getElementById(item.name);
    el.style.width = `${this.width  0.8}px`;
    el.style.height = `${this.width  0.8}px`;
    el.style.lineHeight = `${this.width  0.8}px`;
    el.style.background = this.itemBg;
   });
   //根据position，选择不同的定位
   switch (this.position) {
    case 'LT':
     this.$refs.menuHome.style.left = '20px';
     this.$refs.menuHome.style. = '20px';
     this.menuItems.forEach((item) => {
      let el = document.getElementById(item.name);
      el.style.left = '26px';
      el.style. = '26px';

     });
     this.operators = ['+', '+'];
     break;
    ...
   }
  },
  methods: {
   toggleMenu() {
    if (!this.openFlag) {//合并时，点击展开操作
     this.menuItems.forEach((item, index) => {
      this.toggleMenuTransition(item.name, index, false)
     });
     //menu本身转一周
     this.$refs.menuHome.style.transform = 'rotate(360deg)';
    } else {
     this.menuItems.forEach((item, index) => {
      this.toggleMenuTransition(item.name, index, true)
     });
     //menu恢复
     this.$refs.menuHome.style.transform = 'rotate(0)';
    }
    this.openFlag = !this.openFlag;
   },
   toggleMenuTransition(name, index, revert) {
    let oneArea = 90 / (this.menuItems.length - 1);//每一块所占的角度
    let axisX = Math.sin((this.menuItems.length - 1 - index)  oneArea  2  Math.PI / 360);//横坐标所偏移的比例
    let axisY = Math.cos((this.menuItems.length - 1 - index)  oneArea  2  Math.PI / 360);//纵坐标所便宜的比例
    let el = document.getElementById(name);//若所传的name一直，会报错。
    let that = this;
    if (!revert) {
     setTimeout(function () {
      el.style.transitionDuration = '200ms';
      el.style.transform = `translate(${that.operators[0]}${that.baseDistance  axisX}px,${that.operators[1]}${that.baseDistance  axisY }px)`;//进行动画
     }, index  100)//通过定时器的方式，达到一个一个弹出来的效果
    } else {
     //item恢复
     el.style.transitionDuration = '200ms';
     el.style.transform = `translate(0,0)`;
    }
   },
   clickMenu(item, index) {
    //暴露方法给父组件，进行点击事件的操作
    this.$emit('clickMenu', item, index)
   }
  }
 }

ponents: {
   toggleMenu
},

menuItems: [//name和src必填，且name唯一否则会报错
    {name: 'menu1', src: require('../assets/emoji.png')},
    {name: 'menu2', src: require('../assets/cart.png')},
    {name: 'menu3', src: require('../assets/folder.png')},
    {name: 'menu4', src: require('../assets/home.png')},
    {name: 'menu5', src: require('../assets/my.png')},
]
<toggle-menu :menuItems="menuItems"
       @clickMenu="clickMenu"
       ></toggle-menu>