test/pages/info/postProductInfo/index.js

// pages/info/roadInfo/index.js
let device = wx.getSystemInfoSync();
const ratio = device.windowWidth / 750;
import commonApi from "../../../utils/https/common"
let app = getApp()
Page({

  /**
   * 页面的初始数据
   */
  data: {
    fixed:false,
    type:1,
    top:0,
    isLike:0,
    commentTotal:0,
    comment:[],
    info:null,
    skuFlag:null,
    producNum:1,
    skuIndex:0
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    let rect = wx.getMenuButtonBoundingClientRect();
    let height = (rect.top - device.statusBarHeight) * 2 + rect.height + device.statusBarHeight;
    console.log(height)
    this.setData({
      top:height,
      id:options.id
    })
    commonApi._post("product/get_product_detail",{
      id:options.id
    }).then(res=>{
      res.data.display_tags = (res.data.display_tags?res.data.display_tags.split(","):[]).splice(0,2)
      this.setData({
        info:res.data
      })
    })
    if(wx.getStorageSync("jstrip_token")){
      commonApi.user_post("product/is_product_collection",{
        product_id:options.id
      }).then(res=>{
        this.setData({
          isLike:res.data
        })
      })
    }
    // 获取评价列表
    commonApi._post("product/product_comment_list",{
      product_id:options.id
    }).then(res=>{
      res.data.list.map(item=>{
        item.rate = Number(item.rate)
      })
      this.setData({
        comment:res.data.list,
        commentTotal:res.data.total
      })
    })
  },
  like:function(){
    let id = this.data.id,isLike = this.data.isLike;
    commonApi.user_post("product/"+(isLike==1?"product_cancel_collection":"product_collection"),{
      product_id:id
    }).then(res=>{
      if(res.code==1){
        this.setData({
          isLike:isLike==1?0:1
        })
      }
    })
  },
  changeMenu:function(e){
    let index = e.currentTarget.dataset.index,that = this;
    const query=wx.createSelectorQuery();  //创建节点查询器
    query.select("#box"+index).boundingClientRect()  //选择toViewid获取位置信息
    query.selectViewport().scrollOffset()  //获取页面查询位置的
    query.exec(function(res) {
      let scrollTop = res[0].top + res[1].scrollTop - 110 * ratio - that.data.top;
      wx.pageScrollTo({
        scrollTop: scrollTop + 4,
        duration: 0
      })
      that.setData({
        type:index
      })
    })
  },
  onPageScroll:function(e){
    let that = this,height = this.data.top;
    let topHeight = height;
    wx.createSelectorQuery().select('#menus').boundingClientRect(function(rect){
      console.log(rect.top,topHeight)
      if(rect.top<=topHeight){
        // 此时应该把menus固定在顶部
        that.setData({
          fixed:true
        })
      }
      else{
        that.setData({
          fixed:false
        })
      }
      // 滚动时判断滚动到哪个部分了
      const query=wx.createSelectorQuery();  //创建节点查询器
      query.select("#box1").boundingClientRect()  //选择toViewid获取位置信息
      query.select("#box2").boundingClientRect()  //选择toViewid获取位置信息
      query.select("#box3").boundingClientRect()  //选择toViewid获取位置信息
      let minHeight = that.data.fixed?(110 * ratio + height): topHeight;
      query.exec(function(res) {
        if(res[2].top<minHeight){
          that.setData({
            type:3
          })
        }
        else if(res[1].top<minHeight){
          that.setData({
            type:2
          })
        }
        else {
          that.setData({
            type:1
          })
        }
      })
    }).exec()
    
  },
  showCart:function(){
    this.setData({
      skuFlag:"cart"
    })
  },
  hideSku:function(){
    this.setData({
      skuFlag:null
    })
  },
  minus:function(){
    if(this.data.producNum==1) return;
    this.setData({
      producNum:this.data.producNum-1
    })
  },
  add:function(){
    this.setData({
      producNum:this.data.producNum+1
    })
  },
  selectSku:function(e){
    let index = e.currentTarget.dataset.index;
    this.setData({
      skuIndex:index
    })
  },
  showOrder:function(){
    this.setData({
      skuFlag:'order'
    })
  },
  order:function(){
    if(this.data.skuFlag=='order'){
      app.globalData.couponInfo = null;
      // 购买
      let product = [{
        product:this.data.info,
        sku:this.data.info.sku[this.data.skuIndex],
        productNum:this.data.producNum
      }];
      app.globalData.postProduct = product;
      wx.navigateTo({
        url: '/pages/order/postOrder/index',
      })
    }
    else {
      commonApi.user_post("cart/add_sku",{
        sku_id:this.data.info.sku[this.data.skuIndex].id,
        num:this.data.producNum
      }).then(res=>{
        if(res.code==1){
          wx.showToast({
            title: '加入购物车成功',
            icon:"success"
          });
          this.setData({
            skuFlag:null
          })
        }
      })
    }
  },
  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {

  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {

  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh: function () {

  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {

  },

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage: function () {

  }
})