vue.js实现简单轮播图效果

<template>
<div class="slide-show">
<div class="slide-img">
<transition name="slide-trans" >
<img v-if='ifshow' :src='imgArray[nowindex]'>
</transition>
<transition name="slide-trans-old">
  <img v-if="!ifshow" :src="http://9i0i.com/pic.php?p=imgArray[nowindex]">
 </transition>
<ul class="slide-pages">
<li v-for="(item,index) in imgArray">
<span :class="{on :index===nowindex}" @click="goto(index)"></span>
</li>
</ul>
</div>
</div>
</template>

data(){
return{
imgArray: [
require('../../img/item_01.png'),
require('../../img/item_02.png'),
require('../../img/item_03.png'),
require('../../img/item_04.png')
]
}
}

<script type="text/javascript">
export default {
props:{
imgArray:{
type:Array,
default:[]
}
},
data() {
return {
ifshow:true,
nowindex:0,
}
},
created(){
this.timerun()
},
computed:{
nextindex(){
if(this.nowindex === this.imgArray.length -1){
return 0
}else{
return this.nowindex + 1
}
}
},
methods: {
goto(index){
let that = this;
this.ifshow = false;
setTimeout(function(){
that.ifshow = true;
that.nowindex = index;
},100)

},
timerun(){
 let that = this;
 setInterval(function(){
 that.goto(that.nextindex)
 },2000)
 }
}
}
</script>