yyq_wxapp/pages/tool/agree/agree.js

const signUrl="https://yyq2.oss-cn-shanghai.aliyuncs.com/pdf/sign.jpg"
Page({
  data:{
    currentTime:10,
  },
  onLoad:function(options){
    // 页面初始化 options为页面跳转所带来的参数
    this.shartTick()
  },
  onReady:function(){
    // 页面渲染完成
  },

  gotoSign(){
    wx.navigateTo({
      url: '/pages/tool/sign/signature',
    })
  },
  preview(){
      wx.previewImage({
        urls: ["https://yyq2.oss-cn-shanghai.aliyuncs.com/pdf/sign.jpg"], //预览图片 数组
      })
  },
  shartTick:function(){
    let currentTime= 10
    let _this = this
    let interval = setInterval(function() {
      currentTime--;
      _this.setData({ currentTime})
      if( currentTime <1){
        clearInterval( interval )
      }
      console.log( currentTime )
    }, 1000)
    // 页面显示
  },
  onHide:function(){
    // 页面隐藏
  },
  onUnload:function(){
    // 页面关闭
  }
})