微信小程序实现商品属性联动选择

<!-- <view class="title">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-code="{{attrCode}}" 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" bindtap="submit">选好了    </button> </view> 

//数据结构：以一组一组的数据来进行设定   commodityAttr: [   {    priceId: 1,    price: 35.0,    "stock": 8,    "attrValueList": [     {      "attrKey": "规格：",      "attrValue": "+免费配料",      "attrCode": "1001"     },     {      "attrKey": "甜度：",      "attrValue": "七分甜",      "attrCode": "2001"     },     {      "attrKey": "加料：",      "attrValue": "珍珠",      "attrCode": "3001"     },     {      "attrKey": "冰块：",      "attrValue": "少冰",      "attrCode": "4001"     }    ]   },   {    priceId: 2,    price: 35.1,    "stock": 9,    "attrValueList": [     {      "attrKey": "规格：",      "attrValue": "+燕麦",      "attrCode": "1002"     },     {      "attrKey": "甜度：",      "attrValue": "五分甜",      "attrCode": "2002"     },     {      "attrKey": "加料：",      "attrValue": "椰果",      "attrCode": "3002"     },     {      "attrKey": "冰块：",      "attrValue": "去冰",      "attrCode": "4002"     }    ]   },   {    priceId: 3,    price: 35.2,    "stock": 10,    "attrValueList": [     {      "attrKey": "规格：",      "attrValue": "+布丁",      "attrCode": "1003"     },     {      "attrKey": "甜度：",      "attrValue": "无糖",      "attrCode": "2003"     },     {      "attrKey": "加料：",      "attrValue": "仙草",      "attrCode": "3003"     },     {      "attrKey": "冰块：",      "attrValue": "常温",      "attrCode": "4003"     }    ]   },   {    priceId: 4,    price: 35.2,    "stock": 10,    "attrValueList": [     {      "attrKey": "规格：",      "attrValue": "再加一份奶霜",      "attrCode": "1004"     },     {      "attrKey": "甜度：",      "attrValue": "无糖",      "attrCode": "2003"     },     {      "attrKey": "加料：",      "attrValue": "仙草",      "attrCode": "3004"     },     {      "attrKey": "冰块：",      "attrValue": "热饮",      "attrCode": "4004"     }    ]   },   {    priceId: 5,    price: 35.2,    "stock": 10,    "attrValueList": [     {      "attrKey": "规格：",      "attrValue": "+免费配料",      "attrCode": "1004"     },     {      "attrKey": "甜度：",      "attrValue": "五分甜",      "attrCode": "2003"     },     {      "attrKey": "加料：",      "attrValue": "椰果",      "attrCode": "3004"     },     {      "attrKey": "冰块：",      "attrValue": "常温",      "attrCode": "4004"     }    ]   }  ],  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);   }  } }

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: '请选择完整！',    icon: 'loading',    duration: 1000   })  } else {   var valueStr = "";   for(var i = 0;i < value.length;i++){    console.log(value[i]);    valueStr += value[i]+",";   }   wx.showModal({    title: '提示',    content: valueStr,    success: function (res) {     if (res.confirm) {      console.log('用户点击确定')     } else if (res.cancel) {      console.log('用户点击取消')     }    }   })    console.log(valueStr);  } }

.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;  display: flex; flex-direction: column;} /*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 30rpx;  margin: 10rpx 10rpx;  border: 1rpx solid #ececec;  border-radius:5px; line-height:30px;} /*每个属性选中的当前样式*/.attr_value_active {  border-radius: 10rpx;  color: #0089dc;  padding: 0 30rpx;  border: 1rpx solid #0089dc;  /* background: #fff;  */} /*禁用属性*/.attr_value_disabled {  color: #ccc; }  /*button*/.weui-btn-area {  margin: 1.17647059em 15px 0.3em; } .weui-btn{ width: 80%; height: 100rpx; border-radius: 3rpx;  background-color:#0089dc;  color: #fff; }