<template>
<div id="box">
<div id="con1" ref="con1" :class="{anim:animate==true}" @mouseenter="mEnter" @mouseleave="mLeave">
<p v-for='item in items'>中獎人的名字是--{{item.name}}</p>
</div>
</div>
</template>
<script>
export default {
data () {
return {
animate:false,
items:[ //消息列表對應的數組
{name:"馬雲"},
{name:"雷軍"},
{name:"王勤1"},
{name:"王勤2"},
{name:"王勤3"},
{name:"王勤4"},
{name:"王勤5"},
],
}
},
mounted () {
this.timer1= setInterval(this.scroll,1000)
},
methods: {
scroll(){
let con1 = this.$refs.con1;
con1.style.marginTop='-30px';
this.animate=!this.animate;
var that = this; // 在異步函數中會出現this的偏移問題，此處一定要先保存好this的指向
setTimeout(function(){
that.items.push(that.items[0]);
that.items.shift();
con1.style.marginTop='0px';
that.animate=!that.animate; // 這個地方如果不把animate 取反會出現消息回滾的現象，此時把ul 元素的過渡屬性取消掉就可以完美實現無縫滾動的效果了
},500)
},
mEnter () {
clearInterval(this.timer1)
},
mLeave () {
this.timer1= setInterval(this.scroll,1000)
},
},
// watch : {
// state : {
// handler : function (newValue,oldValue) {
// }
// }
// }
}
</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>