Vue弹出菜单功能的实现代码

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

{ 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.top = '20px'; this.menuItems.forEach((item) => { let el = document.getElementById(item.name); el.style.left = '26px'; el.style.top = '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.$refs.menuHome.style.transform = 'rotate(360deg)';
} else {
this.menuItems.forEach((item,true)
});
//menu恢复
this.$refs.menuHome.style.transform = 'rotate(0)';
}
this.openFlag = !this.openFlag;
},toggleMenuTransition(name,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)
}
}
}