获取验证码倒计时

<view class="getNum" @click="getNum" v-show="numShow">
    获取验证码
</view>
<view class="Num" v-show="!numShow">
    {{num}}s
</view>

data(){
    return {
        //控制文字和数字的显隐性
        numShow:true
    }
}
getNum: function () {
    this.numShow = false
    var interval = setInterval(() => {
        --this.second
    }, 1000)
    setTimeout(() => {
        clearInterval(interval)
        this.numShow = true
    }, 60000)
},