<template>
<div id="box">
<ul id="con1" ref="con1" :class="{anim:animate==true}">
<li v-for='item in items'>{{item.name}}</li>
</ul>
</div>
</template>
<script>
export default {
data () {
return {
animate:false,
items:[ //消息列表对应的数组
{name:"马云"},
{name:"雷军"},
{name:"王勤1"},
{name:"王勤2"},
{name:"王勤3"},
{name:"王勤4"},
{name:"王勤5"},
]
}
},
computed: {
top() {
return - this.activeIndex * 2.5 + 'rem';
}
},
created () {
setInterval(this.scroll,1000)
},
methods: {
scroll(){
let con1 = this.$refs.con1;
con1.style.marginTop='-30px';
this.animate=!this.animate;
var that = this; // 在异步函数中会出现this的偏移问题，此处一定要先保存好this的指向
setTimeout(function(){
that.items.push(that.items[0]);
that.items.shift();
con1.style.marginTop='0px';
that.animate=!that.animate; // 这个地方如果不把animate 取反会出现消息回滚的现象，此时把ul 元素的过渡属性取消掉就可以完美实现无缝滚动的效果了
},500)
}
}
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
*{
margin: 0 ;
padding: 0;
}
#box{
width: 300px;
height: 175px;
line-height: 30px;
overflow: hidden;
padding-left: 30px;
border: 1px solid black;
transition: all 0.5s;
}
.anim{
transition: all 0.5s;
}
#con1 li{
list-style: none;
line-height: 30px;
height: 30px;
}
</style>