本文實例為大家分享了微信小程序實現商品屬性聯動選擇的具體代碼，供大家參考，具體內容如下
效果演示：
代碼示例
1、commodity.xml
<!-- <view class="title">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-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">選好了 </button> </view> 上述代碼把頁面盒子分為兩部分commodity_attr_list和weui-btn-area。
commodity_attr_list：循環獲取商品的屬性名和相對應的屬性值，并布局頁面。
weui-btn-area：提交校驗并獲取選中商品屬性結果。
2、commodity.js
數據結構
//數據結構：以一組一組的數據來進行設定 commodityAttr: [ { priceId: 1, price: 35.0, "stock": 8, "attrValueList": [ { "attrKey": "規格：", "attrValue": "+免費配料", "attrCode": "1001" }, { "attrKey": "甜度：", "attrValue": "七分甜", "attrCode": "2001" }, { "attrKey": "加料：", "attrValue": "珍珠", "attrCode": "3001" }, { "attrKey": "冰塊：", "attrValue": "少冰", "attrCode": "4001" } ] }, { priceId: 2, price: 35.1, "stock": 9, "attrValueList": [ { "attrKey": "規格：", "attrValue": "+燕麥", "attrCode": "1002" }, { "attrKey": "甜度：", "attrValue": "五分甜", "attrCode": "2002" }, { "attrKey": "加料：", "attrValue": "椰果", "attrCode": "3002" }, { "attrKey": "冰塊：", "attrValue": "去冰", "attrCode": "4002" } ] }, { priceId: 3, price: 35.2, "stock": 10, "attrValueList": [ { "attrKey": "規格：", "attrValue": "+布丁", "attrCode": "1003" }, { "attrKey": "甜度：", "attrValue": "無糖", "attrCode": "2003" }, { "attrKey": "加料：", "attrValue": "仙草", "attrCode": "3003" }, { "attrKey": "冰塊：", "attrValue": "常溫", "attrCode": "4003" } ] }, { priceId: 4, price: 35.2, "stock": 10, "attrValueList": [ { "attrKey": "規格：", "attrValue": "再加一份奶霜", "attrCode": "1004" }, { "attrKey": "甜度：", "attrValue": "無糖", "attrCode": "2003" }, { "attrKey": "加料：", "attrValue": "仙草", "attrCode": "3004" }, { "attrKey": "冰塊：", "attrValue": "熱飲", "attrCode": "4004" } ] }, { priceId: 5, price: 35.2, "stock": 10, "attrValueList": [ { "attrKey": "規格：", "attrValue": "+免費配料", "attrCode": "1004" }, { "attrKey": "甜度：", "attrValue": "五分甜", "attrCode": "2003" }, { "attrKey": "加料：", "attrValue": "椰果", "attrCode": "3004" }, { "attrKey": "冰塊：", "attrValue": "常溫", "attrCode": "4004" } ] } ], attrValueList: [] }屬性選中和取消選擇效果處理
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); } } }結果提交
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: '請選擇完整！', 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('用戶點擊確定') } else if (res.cancel) { console.log('用戶點擊取消') } } }) console.log(valueStr); } }3、commodity.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; display: flex; flex-direction: column;} /*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 30rpx; margin: 10rpx 10rpx; border: 1rpx solid #ececec; border-radius:5px; line-height:30px;} /*每個屬性選中的當前樣式*/.attr_value_active { border-radius: 10rpx; color: #0089dc; padding: 0 30rpx; border: 1rpx solid #0089dc; /* background: #fff; */} /*禁用屬性*/.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; }好了，復制上述代碼就可以實現效果哦，趕緊試試吧！
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
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