微信小程序实现商品属性联动选择
编程学习 2021-07-04 15:50www.dzhlxh.cn编程入门
这篇文章主要为大家详细介绍了微信小程序实现商品属性联动选择，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
本文实例为大家分享了微信小程序实现商品属性联动选择的具体代码，供大家参考，具体内容如下
效果演示：
代码示例
1、commodity.xml
<!-- <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>
上述代码把页面盒子分为两部分commodity_attr_list和weui-btn-area。
commodity_attr_list：循环获取商品的属性名和相对应的属性值，并布局页面。
weui-btn-area：提交校验并获取选中商品属性结果。
2、commodity.js
数据结构
//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: []
}
属性选中和取消选择效果处理
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);
}
}
}
结果提交
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: '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);
}
}
3、commodity.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;
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;
}
好了，复制上述代码就可以实现效果哦，赶紧试试吧！
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持狼蚁SEO。
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