<view class=‘returnBtn’ bindtap=“returnBtn”>返回首页（{{time}}）</view>

Page({

data: {

time:3,

timer:null

},

onLoad: function (options) {

this.data.timer=setInterval(()=>{

if (this.data.time==0){

clearInterval(this.data.timer)

this.returnBtn()

}else{

this.data.time–;

this.setData({

time: this.data.time

})

}      

},1000)

},

returnBtn(){

clearInterval(this.data.timer)

wx.reLaunch({

url: ‘/pages/index_/index_’,

})

},

})