续上一篇的文章: 所提及的购物数量的加减,现在说说商品属性值联动选择。
为了让同学们有个直观的了解,到电商网截了一个图片,就是红圈所示的部分
现在就为大家介绍这个小组件,在小程序中,该如何去写 下图为本项目的图:
wxml:
wxss:
.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。
}
},/ 选中 /
selectValue: function (attrValueList,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',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,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,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);
}
}
},/ 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: '请完善属性',icon: 'loading',duration: 1000
})
} else {
wx.showToast({
title: '选择的属性:' + value.join('-'),icon: 'sucess',duration: 1000
})
}
}
})
运行效果: