hunjianghu/江可飞/小程序开发/pages/gouwu/gouwu.js

// pages/gouwu/gouwu.js
Page({

  /**
   * 页面的初始数据
   */
  data: {
    'iscart': false,
    'checked': [],
    'goodList': [{
        'cover': '/pages/index/image/suanfa.jpg',
        'isbn': '9787535482051',
        'desc': '计算机算法设计',
        'price': 20,
        'count': 1,
        'checked': false
      },
      {
        'cover': '/pages/index/image/jichu.jpg',
        'isbn': '9787540455958',
        'desc': '计算机基础',
        'price': 30,
        'count': 1,
        'checked': false
      },
      {
        'cover': '/pages/index/image/rjgcdl.jpg',
        'isbn': '9787539982830',
        'desc': '软件工程导论',
        'price': 25,
        'count': 1,
        'checked': false
      },
      {
        'cover': '/pages/index/image/java.jpg',
        'isbn': '9787550013247',
        'desc': 'Java Web',
        'price': 17,
        'count': 1,
        'checked': false
      },
      {
        'cover': '/pages/index/image/byyl.jpg',
        'isbn': '9787208061644',
        'desc': '编译原理',
        'price': 15,
        'count': 1,
        'checked': false
      }
    ],
    'bookList': [],
    'checkAll': false,
    'totalCount': 0,
    'totalPrice': 0,
    'consignee': "杨盼成",
    'phone': '12345678912'
  },

  /**
   * 删除购物车当前商品
   */
  deleteList(e) {
    const index = e.currentTarget.dataset.index;
    let bookList = this.data.bookList;
    bookList.splice(index, 1);
    this.setData({
      bookList: bookList
    });
    if (!bookList.length) {
      this.setData({
        iscart: true
      });
    } else {
      this.calculateTotal();
    }
  },

  /**
   * 计算商品总数
   */
  calculateTotal: function() {
    var bookList = this.data.bookList;
    var totalCount = 0;
    var totalPrice = 0;
    for (var i = 0; i < bookList.length; i++) {
      var book = bookList[i];
      if (book.checked) {
        totalCount += book.count;
        totalPrice += book.count * book.price;
      }
    }
    totalPrice = totalPrice.toFixed(2);
    this.setData({
      'totalCount': totalCount,
      'totalPrice': totalPrice
    })
  },

  /**
   * 用户点击商品减1
   */
  subtracttap: function(e) {
    var index = e.target.dataset.index;
    var bookList = this.data.bookList;
    var count = bookList[index].count;
    if (count <= 1) {
      return;
    } else {
      bookList[index].Count--;
      this.setData({
        'bookList': bookList
      });
      this.calculateTotal();
    }
  },

  /**
   * 用户点击商品加1
   */
  addtap: function(e) {
    var index = e.target.dataset.index;
    var bookList = this.data.bookList;
    var count = bookList[index].count;
    bookList[index].Count++;
    this.setData({
      'bookList': bookList
    });
    this.calculateTotal();
  },
  /**
   * 用户选择购物车商品
   */
  checkboxChange: function(e) {
    console.log('checkbox发生change事件，携带value值为：', e.detail.value);
    var checkboxItems = this.data.bookList;
    var values = e.detail.value;
    for (var i = 0; i < checkboxItems.length; ++i) {
      checkboxItems[i].checked = false;
      for (var j = 0; j < values.length; ++j) {
        if (checkboxItems[i].BookID == values[j]) {
          checkboxItems[i].checked = true;
          break;
        }
      }
    }

    var checkAll = false;
    if (checkboxItems.length == values.length) {
      checkAll = true;
    }

    this.setData({
      'bookList': checkboxItems,
      'checkAll': checkAll
    });
    this.calculateTotal();
  },

  /**
   * 用户点击全选
   */
  selectalltap: function(e) {
    // console.log('用户点击全选，携带value值为：', e.detail.value);
    var value = e.detail.value;
    var checkAll = false;
    if (value && value[0]) {
      checkAll = true;
    }

    var bookList = this.data.bookList;
    for (var i = 0; i < bookList.length; i++) {
      var book = bookList[i];
      book['checked'] = checkAll;
    }

    this.setData({
      'checkAll': checkAll,
      'bookList': bookList
    });
    this.calculateTotal();
  },

  todetail: function(e) {
    var id = e.target.dataset.id
    wx.navigateTo({
      url: "/pages/detail/detail?id=" + id
    })
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function(options) {
    var that = this
    wx.request({
      url: "http://45.76.158.31:8080/web/GetFrontInfo.do",
      header: {
        "content-type": "json"
      },
      success: function(res) {
        for (var i = 0; i < res.data.length; i++) {
          res.data[i].checked = false;
        }
        console.log(res.data)
        if (res.statusCode == 200) {
          that.setData({
            bookList: res.data,
          })
          //wx.hideNavigationBarLoading()
        }
      }
    })
  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function() {
    this.calculateTotal();
  },

  /**
   * 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() {

  },

  newAddress: function() {
    var checkList = [];
    if (!this.data.iscart) {
      var bookList = this.data.bookList
      for (var i = 0; i < bookList.length; i++) {
        if (bookList[i].checked) {
          checkList.push(this.data.bookList[i])
        }
      }
    }
    var checkLists = JSON.stringify(checkList)
    console.log(checkLists)
    //if (this.data.totalCount > 0) {
    wx.navigateTo({
      url: '/pages/order/order?typeId=0&checkLists=' + checkLists
    })
    // }
    // else {
    //   wx.showToast({
    //     title: '没有选择商品',
    //     icon: 'success',
    //     duration: 2000
    //   })
    // }
  }

})