onShareAppMessage: function (options) {
let shareObj = {}
if (options.from == "button") {
    //设置title、path、imageUrl
   shareObj.title = ''
   shareObj.path = ''
   shareObj.imageUrl = ''
}
return shareObj
}

function getCurrentPageUrlWithArgs(){
    var pages = getCurrentPages()    //获取加载的页面
    var currentPage = pages[pages.length-1]    //获取当前页面的对象
    var url = currentPage.route    //当前页面url
    var options = currentPage.options    //如果要获取url中所带的参数可以查看options
    var urlWithArgs = ''
    //拼接url的参数
    if (options) {
      urlWithArgs = url + '?'
      for(var key in options){
        var value = options[key]
        urlWithArgs += key + '=' + value + '&'
      }
    } else {
      urlWithArgs = url + ' '
    }
    urlWithArgs = urlWithArgs.substring(0, urlWithArgs.length-1)
    return urlWithArgs
}

this.setData({
  ['hotTodayList[' + curPage + ']']: res.list,  // curPage表示二维数组的下标，如果分页是从1开始,则curPage等于当前页减去1，如果分页从0开始，则curPage就等于当前页数
  pageNum: this.data.pageNum + 1,
  totalPage: totalPage,
})

<block wx:for="{{hotTodayList}}" wx:for-item="arrItem" wx:for-index="arrIndex">
  <block wx:for="{{arrItem}}" wx:for-item="item" wx:key="index" wx:for-index="index">
    // 需要渲染的页面结构
  </block>
</block>

可在onLaunch方法中调用如下方法
// 获取小程序更新机制兼容
    if (wx.canIUse("getUpdateManager")) {
      const updateManager = wx.getUpdateManager();
      updateManager.onCheckForUpdate(function (res) {
        // 请求完新版本信息的回调
        if (res.hasUpdate) {
          updateManager.onUpdateReady(function () {
            wx.showModal({
              title: "更新提示",
              content: "新版本已经准备好，是否重启应用？",
              success: function (res) {
                if (res.confirm) {
                  // 新的版本已经下载好，调用 applyUpdate 应用新版本并重启
                  updateManager.applyUpdate();
                }
              }
            });
          });
          updateManager.onUpdateFailed(function () {
            // 新的版本下载失败
            wx.showModal({
              title: "已经有新版本了哟~",
              content: "新版本已经上线啦~，请您删除当前小程序，重新搜索打开哟~"
            });
          });
        }
      });
    } else {
      // 如果希望用户在最新版本的客户端上体验您的小程序，可以这样子提示
      wx.showModal({
        title: "提示",
        content: "当前微信版本过低，无法使用该功能，请升级到最新微信版本后重试。"
      });
    }

{
  "pages": [
    "pages/index/index"
  ],
  "subPackages": [
    {
      "root": "package_a",
      "pages": [
        "pages/home/home"
      ]
    },
    {
      "root": "package_b",
      "pages": [
        "pages/home/home"
      ]
    }
  ],
  "tabBar": {
    "color": "#444",
    "selectedColor": "#fe4d4d",
    "backgroundColor": "#ffffff",
    "list": [
      {
        "pagePath": "pages/index/index",
        "text": "首页",
        "iconPath": "pages/index/home.png",
        "selectedIconPath": "pages/index/home_select.png"
      },
      {
        "pagePath": "pages/prefer_goods/prefer_goods",
        "text": "拼好货",
        "iconPath": "pages/prefer_goods/prefer_goods.png",
        "selectedIconPath": "pages/prefer_goods/prefer_goods_select.png"
      },
      {
        "pagePath": "pages/my/my",
        "text": "我的",
        "iconPath": "pages/my/my.png",
        "selectedIconPath": "pages/my/my_select.png"
      }
    ]
  },
  "window": {
    // 相关配置
  },
  "navigateToMiniProgramAppIdList": [
     // 所要跳转的小程序appid
  ]
}

roundRectColor: function (context, x, y, w, h, r) {  //绘制圆角矩形（纯色填充）
    context.save()
    if (w < 2 * r) {
      r = w / 2
    }
    if (h < 2 * r) {
      r = h / 2
    }
    context.beginPath()
    context.setFillStyle('#fff')   // 填充颜色为白色
    context.setStrokeStyle('#fff')  // 描边颜色为白色
    context.moveTo(x + r, y)
    context.arcTo(x + w, y, x + w, y + h, r)
    context.arcTo(x + w, y + h, x, y + h, r)
    context.arcTo(x, y + h, x, y, r)
    context.arcTo(x, y, x + w, y, r)
    context.fill()
    context.closePath()
  }