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微信小程式商城專案中商品屬性分類的實現

不言原創: 2018-06-27 15:06:574930瀏覽

這篇文章主要為大家詳細介紹了微信小程式商城專案之商品屬性值連動選擇,具有一定的參考價值，有興趣的小夥伴們可以參考一下

續上一篇的文章：微信小程式之購物數量加減

所提及的購物數量的加減，現在說說商品屬性值連動選擇。

為了讓同學們有個直覺的了解，到電商網截了一個圖片，就是紅圈所示的部分

#現在就為大家介紹這個小元件，在小程式中，該如何去寫
下圖為本專案的圖：

##wxml：

<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?&#39;attr_value_active&#39;:&#39;&#39;):&#39;attr_value_disabled&#39;}}" 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>

wxss：

.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; 
}

js：

資料部分，一般情況都是訪問介面取得資料的，這裡並沒有使用網路訪問，為了簡化demo，直接把一組資料放在data物件中。

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:&#39;型号&#39;, 
 attrValueList:[&#39;1&#39;,&#39;2&#39;,&#39;3&#39;] 
 } 
 */ 
 // 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(&#39;属性索引&#39;, 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(&#39;result&#39;, 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:&#39;型号&#39;, 
 attrValueList:[&#39;1&#39;,&#39;2&#39;,&#39;3&#39;], 
 selectedValue:&#39;1&#39;, 
 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(&#39;firstIndex&#39;, 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(&#39;其他选中的属性值全都置空&#39;, 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 = &#39;&#39;; 
 } 
 } 
 } else { 
 var commodityAttr = this.data.includeGroup; 
 } 
 
 // console.log(&#39;选中&#39;, 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(&#39;结果&#39;, 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 = &#39;&#39;; 
 
 // 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: &#39;请完善属性&#39;, 
 icon: &#39;loading&#39;, 
 duration: 1000 
 }) 
 } else { 
 wx.showToast({ 
 title: &#39;选择的属性：&#39; + value.join(&#39;-&#39;), 
 icon: &#39;sucess&#39;, 
 duration: 1000 
 }) 
 } 
 } 
})

運行效果：

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微信小程式商城專案中商品屬性分類的實現

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