小程序启动页demo

Page({
  data: {
    time:"5",
    jishiqi:""
  },

  onLoad: function (options) {
    let a;
    // this.bindload();
    let that = this
    this.setData({
//把计时器写在data里方便清除定时器
      jishiqi:   setInterval(() => {
     a = 1
        if (that.data.time == 0) {
          a = 0
          that.bindload();
        }
        that.setData({
            time: that.data.time -= a
          })
      }, 1000)
    })
  },

  bindload(){
    wx.switchTab({
      url: '/pages/index/index'
      })
  },




onUnload: function () {
//监听页面卸载清除计时器，不然会一直跳到index
    clearInterval(this.data.jishiqi)
  },