微信小程序商城项目之商品属性分类（4）

<view class="title">商品属性值联动选择</view> <!--options--> <view class="commodity_attr_list">  <!--每组属性-->  <view class="attr_box" wx:for="{{attrValueList}}" wx:for-item="attrValueObj" wx:for-index="attrIndex">  <!--属性名-->  <view class="attr_name">{{attrValueObj.attrKey}}</view>  <!--属性值-->  <view class="attr_value_box">  <!--每个属性值-->  <view class="attr_value {{attrIndex==firstIndex || attrValueObj.attrValueStatus[valueIndex]?(value==attrValueObj.selectedValue?'attr_value_active':''):'attr_value_disabled'}}" bindtap="selectAttrValue" data-status="{{attrValueObj.attrValueStatus[valueIndex]}}"  data-value="{{value}}" data-key="{{attrValueObj.attrKey}}" data-index="{{attrIndex}}" data-selectedvalue="{{attrValueObj.selectedValue}}" wx:for="{{attrValueObj.attrValues}}" wx:for-item="value" wx:for-index="valueIndex">{{value}}</view>  </view>  </view> </view> <!--button--> <view class="weui-btn-area">  <button class="weui-btn" type="primary" bindtap="submit">确定</button> </view> 

.title {  padding: 10rpx 20rpx;  margin: 10rpx 0;  border-left: 4rpx solid #ccc; }  /*全部属性的主盒子*/ .commodity_attr_list {  background: #fff;  padding: 0 20rpx;  font-size: 26rpx;  overflow: hidden;  width: 100%; } /*每组属性的主盒子*/ .attr_box {  width: 100%;  overflow: hidden;  border-bottom: 1rpx solid #ececec; } /*属性名*/ .attr_name {  width: 20%;  float: left;  padding: 15rpx 0; } /*属性值*/ .attr_value_box {  width: 80%;  float: left;  padding: 15rpx 0;  overflow: hidden; } /*每个属性值*/ .attr_value {  float: left;  padding: 0 10rpx;  margin: 0 10rpx;  border: 1rpx solid #ececec; } /*每个属性选中的当前样式*/ .attr_value_active {  background: #FFCC00;  border-radius: 10rpx;  color: #fff;  padding: 0 10rpx; } /*禁用属性*/ .attr_value_disabled {  color: #ccc; }  /*button*/ .btn-area {  margin: 1.17647059em 15px 0.3em; }  .btn {  margin-top: 15px;  background-color:#FFCC00;  color: #fff; } .btn:first-child {  margin-top: 0; } 

Page({  data: {  firstIndex: -1,  //准备数据  //数据结构：以一组一组来进行设定  commodityAttr: [  {  priceId: 1,  price: 35.0,  "stock": 8,  "attrValueList": [  {  "attrKey": "型号",  "attrValue": "2"  },  {  "attrKey": "颜色",  "attrValue": "白色"  },  {  "attrKey": "大小",  "attrValue": "小"  },  {  "attrKey": "尺寸",  "attrValue": "S"  }  ]  },  {  priceId: 2,  price: 35.1,  "stock": 9,  "attrValueList": [  {  "attrKey": "型号",  "attrValue": "1"  },  {  "attrKey": "颜色",  "attrValue": "黑色"  },  {  "attrKey": "大小",  "attrValue": "小"  },  {  "attrKey": "尺寸",  "attrValue": "M"  }  ]  },  {  priceId: 3,  price: 35.2,  "stock": 10,  "attrValueList": [  {  "attrKey": "型号",  "attrValue": "1"  },  {  "attrKey": "颜色",  "attrValue": "绿色"  },  {  "attrKey": "大小",  "attrValue": "大"  },  {  "attrKey": "尺寸",  "attrValue": "L"  }  ]  },  {  priceId: 4,  price: 35.2,  "stock": 10,  "attrValueList": [  {  "attrKey": "型号",  "attrValue": "1"  },  {  "attrKey": "颜色",  "attrValue": "绿色"  },  {  "attrKey": "大小",  "attrValue": "大"  },  {  "attrKey": "尺寸",  "attrValue": "L"  }  ]  }  ],  attrValueList: []  },  onShow: function () {  this.setData({  includeGroup: this.data.commodityAttr  });  this.distachAttrValue(this.data.commodityAttr);  // 只有一个属性组合的时候默认选中  // console.log(this.data.attrValueList);  if (this.data.commodityAttr.length == 1) {  for (var i = 0; i < this.data.commodityAttr[0].attrValueList.length; i++) {  this.data.attrValueList[i].selectedValue = this.data.commodityAttr[0].attrValueList[i].attrValue;  }  this.setData({  attrValueList: this.data.attrValueList  });  }  },  /* 获取数据 */  distachAttrValue: function (commodityAttr) {  /**  将后台返回的数据组合成类似  {  attrKey:'型号',  attrValueList:['1','2','3']  }  */  // 把数据对象的数据（视图使用），写到局部内  var attrValueList = this.data.attrValueList;  // 遍历获取的数据  for (var i = 0; i < commodityAttr.length; i++) {  for (var j = 0; j < commodityAttr[i].attrValueList.length; j++) {  var attrIndex = this.getAttrIndex(commodityAttr[i].attrValueList[j].attrKey, attrValueList);  // console.log('属性索引', attrIndex);  // 如果还没有属性索引为-1，此时新增属性并设置属性值数组的第一个值；索引大于等于0，表示已存在的属性名的位置  if (attrIndex >= 0) {  // 如果属性值数组中没有该值，push新值；否则不处理  if (!this.isValueExist(commodityAttr[i].attrValueList[j].attrValue, attrValueList[attrIndex].attrValues)) {  attrValueList[attrIndex].attrValues.push(commodityAttr[i].attrValueList[j].attrValue);  }  } else {  attrValueList.push({  attrKey: commodityAttr[i].attrValueList[j].attrKey,  attrValues: [commodityAttr[i].attrValueList[j].attrValue]  });  }  }  }  // console.log('result', attrValueList)  for (var i = 0; i < attrValueList.length; i++) {  for (var j = 0; j < attrValueList[i].attrValues.length; j++) {  if (attrValueList[i].attrValueStatus) {  attrValueList[i].attrValueStatus[j] = true;  } else {  attrValueList[i].attrValueStatus = [];  attrValueList[i].attrValueStatus[j] = true;  }  }  }  this.setData({  attrValueList: attrValueList  });  },  getAttrIndex: function (attrName, attrValueList) {  // 判断数组中的attrKey是否有该属性值  for (var i = 0; i < attrValueList.length; i++) {  if (attrName == attrValueList[i].attrKey) {  break;  }  }  return i < attrValueList.length ? i : -1;  },  isValueExist: function (value, valueArr) {  // 判断是否已有属性值  for (var i = 0; i < valueArr.length; i++) {  if (valueArr[i] == value) {  break;  }  }  return i < valueArr.length;  },  /* 选择属性值事件 */  selectAttrValue: function (e) {  /*  点选属性值，联动判断其他属性值是否可选  {  attrKey:'型号',  attrValueList:['1','2','3'],  selectedValue:'1',  attrValueStatus:[true,true,true]  }  console.log(e.currentTarget.dataset);  */  var attrValueList = this.data.attrValueList;  var index = e.currentTarget.dataset.index;//属性索引  var key = e.currentTarget.dataset.key;  var value = e.currentTarget.dataset.value;  if (e.currentTarget.dataset.status || index == this.data.firstIndex) {  if (e.currentTarget.dataset.selectedvalue == e.currentTarget.dataset.value) {  // 取消选中  this.disSelectValue(attrValueList, index, key, value);  } else {  // 选中  this.selectValue(attrValueList, index, key, value);  }   }  },  /* 选中 */  selectValue: function (attrValueList, index, key, value, unselectStatus) {  // console.log('firstIndex', this.data.firstIndex);  var includeGroup = [];  if (index == this.data.firstIndex && !unselectStatus) { // 如果是第一个选中的属性值，则该属性所有值可选  var commodityAttr = this.data.commodityAttr;  // 其他选中的属性值全都置空  // console.log('其他选中的属性值全都置空', index, this.data.firstIndex, !unselectStatus);  for (var i = 0; i < attrValueList.length; i++) {  for (var j = 0; j < attrValueList[i].attrValues.length; j++) {  attrValueList[i].selectedValue = '';  }  }  } else {  var commodityAttr = this.data.includeGroup;  }   // console.log('选中', commodityAttr, index, key, value);  for (var i = 0; i < commodityAttr.length; i++) {  for (var j = 0; j < commodityAttr[i].attrValueList.length; j++) {  if (commodityAttr[i].attrValueList[j].attrKey == key && commodityAttr[i].attrValueList[j].attrValue == value) {  includeGroup.push(commodityAttr[i]);  }  }  }  attrValueList[index].selectedValue = value;   // 判断属性是否可选  for (var i = 0; i < attrValueList.length; i++) {  for (var j = 0; j < attrValueList[i].attrValues.length; j++) {  attrValueList[i].attrValueStatus[j] = false;  }  }  for (var k = 0; k < attrValueList.length; k++) {  for (var i = 0; i < includeGroup.length; i++) {  for (var j = 0; j < includeGroup[i].attrValueList.length; j++) {  if (attrValueList[k].attrKey == includeGroup[i].attrValueList[j].attrKey) {  for (var m = 0; m < attrValueList[k].attrValues.length; m++) {  if (attrValueList[k].attrValues[m] == includeGroup[i].attrValueList[j].attrValue) {  attrValueList[k].attrValueStatus[m] = true;  }  }  }  }  }  }  // console.log('结果', attrValueList);  this.setData({  attrValueList: attrValueList,  includeGroup: includeGroup  });   var count = 0;  for (var i = 0; i < attrValueList.length; i++) {  for (var j = 0; j < attrValueList[i].attrValues.length; j++) {  if (attrValueList[i].selectedValue) {  count++;  break;  }  }  }  if (count < 2) {// 第一次选中，同属性的值都可选  this.setData({  firstIndex: index  });  } else {  this.setData({  firstIndex: -1  });  }  },  /* 取消选中 */  disSelectValue: function (attrValueList, index, key, value) {  var commodityAttr = this.data.commodityAttr;  attrValueList[index].selectedValue = '';   // 判断属性是否可选  for (var i = 0; i < attrValueList.length; i++) {  for (var j = 0; j < attrValueList[i].attrValues.length; j++) {  attrValueList[i].attrValueStatus[j] = true;  }  }  this.setData({  includeGroup: commodityAttr,  attrValueList: attrValueList  });   for (var i = 0; i < attrValueList.length; i++) {  if (attrValueList[i].selectedValue) {  this.selectValue(attrValueList, i, attrValueList[i].attrKey, attrValueList[i].selectedValue, true);  }  }  },  /* 点击确定 */  submit: function () {  var value = [];  for (var i = 0; i < this.data.attrValueList.length; i++) {  if (!this.data.attrValueList[i].selectedValue) {  break;  }  value.push(this.data.attrValueList[i].selectedValue);  }  if (i < this.data.attrValueList.length) {  wx.showToast({  title: '请完善属性',  icon: 'loading',  duration: 1000  })  } else {  wx.showToast({  title: '选择的属性：' + value.join('-'),  icon: 'sucess',  duration: 1000  })  }  } })