nsgk_wechat/nsgk_entry/pages/index/index.js

import * as UTIL from '../../utils/util.js';
Page({
    data: {
        //顶部胶囊按钮位置信息rect
        CustomMenuButton: null,
        wrokScrollHeight:0
    },
    onLoad: function (options) {
        this.computeBarLocation()
    },
    onReady: function () {
    },
    onShow: function () {
    },
    onHide: function () {
    },
    /**
   * 计算bar 高度
   */
    computeBarLocation() {
      var that = this;
      let CustomMenuButton = wx.getMenuButtonBoundingClientRect();
      let CustomWidows = wx.getSystemInfoSync();
      // 根据文档，先创建一个SelectorQuery对象实例
      let query = wx.createSelectorQuery().in(this);
      query.select('.top_title').boundingClientRect();
      query.select('.information_header').boundingClientRect();
      query.select('.navList_main').boundingClientRect();
      query.select('.child_function').boundingClientRect();
      query.select('.work_plan').boundingClientRect();
      
      query.exec((res) => {
        let wrokScrollHeight = CustomWidows.windowHeight;
        res.forEach((v)=>{
          wrokScrollHeight = wrokScrollHeight - v.height;
        })
        wrokScrollHeight = wrokScrollHeight-CustomMenuButton.top-CustomMenuButton.bottom -15;
        that.setData({
          wrokScrollHeight: wrokScrollHeight,
        });
      })
      that.setData({
        CustomMenuButton: CustomMenuButton,
      });
    },
})