yyq_wxapp/pages/tool/agree/agree.js

const app = getApp();
Page({
  data:{
    currentTime:10,
    prevUrl:'',
  },
  onLoad:function(options){
    app.getMakerInfo(  res =>{
      this.setData( {prevUrl: res.contract_img })
      if( !res.contract_img ){
        this.shartTick()
      }
    })    
  },
  onReady:function(){
    // 页面渲染完成
  },

  gotoSign(){
    wx.navigateTo({
      url: '/pages/tool/sign/signature',
    })
  },
  preview(){
    let previewUrl =this.data.prevUrl||app.globalData.signUrl;
    wx.previewImage({
      urls: [previewUrl], //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
  }
})