新聞上下輪播

<template> 
<div class="vueBox">
    <div class="marquee">
        <div class="marquee_title">
            <span>uuuuuuu</span>
        </div>
        <div class="marquee_box">
            <ul class="marquee_list" :class="{marquee_top:animate}" @mouseenter="Stop()" @mouseleave="Up()">
                <li v-for="(item, index) in marqueeList" :key="index">
                    <span>{{item.name}}</span>      
                    <span class="red"> {{item.city}}</span>
                    <span class="red"> {{item.amount}}</span>                
                </li>
            </ul>
        </div>
    </div>
 </div>
</template>
<script>
import Vue from "vue";
export default {
  data() {
    return {
           animate: false,
           intnum: undefined,
            marqueeList: [
                {
                    name: '城市',
                    city: '北京',
                    amount: '10'
                },
                {
                    name: '城市',
                    city: '上海',
                    amount: '20'
                },
                {
                    name: '城市',
                    city: '廣州',
                    amount: '30'
                },
                {
                    name: '城市',
                    city: '重慶',
                    amount: '40'
                }
            ]

      
    }
  },

  created(){
           this.execute();
            
  },
  mounted() {
   
  },
  methods: {
    showMarquee: function () {
                this.animate = true;
                setTimeout(()=>{
                 this.marqueeList.push(this.marqueeList[0]);//末尾添加
                   
                this.marqueeList.shift();//移除第一項
             
                this.animate =false;
            },500)
            },
  
    execute(){
        this.intnum=setInterval(this.showMarquee, 2000)
    },
    Stop() {
         clearInterval(this.intnum);   
    },
    Up() {
        this.execute();
    },         

    
  }
};
</script>
<style lang="less" scoped>
div, ul, li, span, img {
    margin: 0;
    padding: 0;
    display: flex;
    box-sizing: border-box;
}
.marquee {
    width: 100%;
    height: 80px;
    align-items: center;
    color: #3A3A3A;
    background-color: #b3effe;
    display: flex;
    box-sizing: border-box;
}
 
.marquee_title {
    padding: 0 20px;
    height: 30px;
    font-size: 14px;
    border-right: 1px solid #d8d8d8;
    align-items: center;
}
 
.marquee_box {
    display: block;
    position: relative;
    width: 60%;
    height: 80px;
    overflow: hidden;
}
 
.marquee_list {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
}
.marquee_top {
    transition: all 0.5s;
    margin-top: -30px
}
 
.marquee_list li {
    height: 30px;
    line-height: 30px;
    font-size: 14px;
    padding-left: 20px;
    cursor: pointer;
}
 
.marquee_list li span {
    padding: 0 2px;
}
 
.red {
    color: #FF0101;
}

</style>