微信小程序之商品属性分类 —— 微信小程序实战商城系列
</view>
</view>
<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：
数据部分，一般情况都是访问接口获取数据的，这里并没有使用网络访问，为了简化 demo，直接把一组数据放在 data 对象中。
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:'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',
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