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這篇文章主要介紹小程序商城項目中商品屬性分類的實現方法,文中介紹的非常詳細,具有一定的參考價值,感興趣的小伙伴們一定要看完!
微信小程序之購物數量加減
所提及的購物數量的加減,現在說說商品屬性值聯動選擇。
為了讓同學們有個直觀的了解,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組件,在小程序中,該如何去寫
下圖為本項目的圖:
wxml:
<view class="title">商品屬性值聯動選擇</view> <!--options--> <view class="commodity_attr_list"> <!--每組屬性--> <view class="attr_box" wx:for="{{attrValueList}}" wx:for-item="attrValueObj" wx:for-index="attrIndex"> <!--屬性名--> <view class="attr_name">{{attrValueObj.attrKey}}</view> <!--屬性值--> <view class="attr_value_box"> <!--每個屬性值--> <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">確定</button> </view>
wxss:
.title { padding: 10rpx 20rpx; margin: 10rpx 0; border-left: 4rpx solid #ccc; } /*全部屬性的主盒子*/ .commodity_attr_list { background: #fff; padding: 0 20rpx; font-size: 26rpx; overflow: hidden; width: 100%; } /*每組屬性的主盒子*/ .attr_box { width: 100%; overflow: hidden; border-bottom: 1rpx solid #ececec; } /*屬性名*/ .attr_name { width: 20%; float: left; padding: 15rpx 0; } /*屬性值*/ .attr_value_box { width: 80%; float: left; padding: 15rpx 0; overflow: hidden; } /*每個屬性值*/ .attr_value { float: left; padding: 0 10rpx; margin: 0 10rpx; border: 1rpx solid #ececec; } /*每個屬性選中的當前樣式*/ .attr_value_active { background: #FFCC00; border-radius: 10rpx; color: #fff; padding: 0 10rpx; } /*禁用屬性*/ .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:
數據部分,一般情況都是訪問接口獲取數據的,這里并沒有使用網絡訪問,為了簡化demo,直接把一組數據放在data對象中。
Page({ data: { firstIndex: -1, //準備數據 //數據結構:以一組一組來進行設定 commodityAttr: [ { priceId: 1, price: 35.0, "stock": 8, "attrValueList": [ { "attrKey": "型號", "attrValue": "2" }, { "attrKey": "顏色", "attrValue": "白色" }, { "attrKey": "大小", "attrValue": "小" }, { "attrKey": "尺寸", "attrValue": "S" } ] }, { priceId: 2, price: 35.1, "stock": 9, "attrValueList": [ { "attrKey": "型號", "attrValue": "1" }, { "attrKey": "顏色", "attrValue": "黑色" }, { "attrKey": "大小", "attrValue": "小" }, { "attrKey": "尺寸", "attrValue": "M" } ] }, { priceId: 3, price: 35.2, "stock": 10, "attrValueList": [ { "attrKey": "型號", "attrValue": "1" }, { "attrKey": "顏色", "attrValue": "綠色" }, { "attrKey": "大小", "attrValue": "大" }, { "attrKey": "尺寸", "attrValue": "L" } ] }, { priceId: 4, price: 35.2, "stock": 10, "attrValueList": [ { "attrKey": "型號", "attrValue": "1" }, { "attrKey": "顏色", "attrValue": "綠色" }, { "attrKey": "大小", "attrValue": "大" }, { "attrKey": "尺寸", "attrValue": "L" } ] } ], attrValueList: [] }, onShow: function () { this.setData({ includeGroup: this.data.commodityAttr }); this.distachAttrValue(this.data.commodityAttr); // 只有一個屬性組合的時候默認選中 // 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 }); } }, /* 獲取數據 */ distachAttrValue: function (commodityAttr) { /** 將后臺返回的數據組合成類似 { attrKey:'型號', attrValueList:['1','2','3'] } */ // 把數據對象的數據(視圖使用),寫到局部內 var attrValueList = this.data.attrValueList; // 遍歷獲取的數據 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('屬性索引', attrIndex); // 如果還沒有屬性索引為-1,此時新增屬性并設置屬性值數組的第一個值;索引大于等于0,表示已存在的屬性名的位置 if (attrIndex >= 0) { // 如果屬性值數組中沒有該值,push新值;否則不處理 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) { // 判斷數組中的attrKey是否有該屬性值 for (var i = 0; i < attrValueList.length; i++) { if (attrName == attrValueList[i].attrKey) { break; } } return i < attrValueList.length ? i : -1; }, isValueExist: function (value, valueArr) { // 判斷是否已有屬性值 for (var i = 0; i < valueArr.length; i++) { if (valueArr[i] == value) { break; } } return i < valueArr.length; }, /* 選擇屬性值事件 */ selectAttrValue: function (e) { /* 點選屬性值,聯動判斷其他屬性值是否可選 { attrKey:'型號', 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;//屬性索引 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) { // 取消選中 this.disSelectValue(attrValueList, index, key, value); } else { // 選中 this.selectValue(attrValueList, index, key, value); } } }, /* 選中 */ selectValue: function (attrValueList, index, key, value, unselectStatus) { // console.log('firstIndex', this.data.firstIndex); var includeGroup = []; if (index == this.data.firstIndex && !unselectStatus) { // 如果是第一個選中的屬性值,則該屬性所有值可選 var commodityAttr = this.data.commodityAttr; // 其他選中的屬性值全都置空 // console.log('其他選中的屬性值全都置空', 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('選中', 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; // 判斷屬性是否可選 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('結果', 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) {// 第一次選中,同屬性的值都可選 this.setData({ firstIndex: index }); } else { this.setData({ firstIndex: -1 }); } }, /* 取消選中 */ disSelectValue: function (attrValueList, index, key, value) { var commodityAttr = this.data.commodityAttr; attrValueList[index].selectedValue = ''; // 判斷屬性是否可選 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); } } }, /* 點擊確定 */ 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: '請完善屬性', icon: 'loading', duration: 1000 }) } else { wx.showToast({ title: '選擇的屬性:' + value.join('-'), icon: 'sucess', duration: 1000 }) } } })
運行效果:
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