《仿盒马》app开发技术分享-- 首页商品流（7）
## 技术栈
Appgallery connect
## 开发准备
上一节我们实现了首页banner模块的功能，现在我们的首页还需要添加商品列表，作为一个购物类应用，商品列表是非常重要的一个模块，所以我们尽量把它设计的足够完善，参数能更好的支持我们后期复杂的逻辑，它需要有图片的展示，适配的优惠券列表，限购，立减，划线价等，但他实际的参数还要更多，因为我们的列表是比较紧凑的，更多的数据需要从点击后的商品详情页展示出来。
**代码实现**
创建商品表
{
"objectTypeName": "home_product_list",
"fields": [
{"fieldName": "id", "fieldType": "Integer", "notNull": true, "belongPrimaryKey": true},
{"fieldName": "goods_list_id", "fieldType": "Integer", "notNull": true, "defaultValue": 0},
{"fieldName": "url", "fieldType": "String"},
{"fieldName": "name", "fieldType": "Text"},
{"fieldName": "price", "fieldType": "Double"},
{"fieldName": "original_price", "fieldType": "Double"},
{"fieldName": "amount", "fieldType": "Integer"},
{"fieldName": "text_message", "fieldType": "String"},
{"fieldName": "parameter", "fieldType": "String"},
{"fieldName": "delivery_time", "fieldType": "String"},
{"fieldName": "endTime", "fieldType": "String"},
{"fieldName": "sales_volume", "fieldType": "Integer"},
{"fieldName": "space_id", "fieldType": "Integer"},
{"fieldName": "max_loop_amount", "fieldType": "Integer"},
{"fieldName": "promotion_spread_price", "fieldType": "Double"},
{"fieldName": "coupon_id", "fieldType": "Integer"}
],
"indexes": [
{"indexName": "field1IndexId", "indexList": [{"fieldName":"id","sortType":"ASC"}]}
],
"permissions": [
{"role": "World", "rights": ["Read"]},
{"role": "Authenticated", "rights": ["Read", "Upsert"]},
{"role": "Creator", "rights": ["Read", "Upsert", "Delete"]},
{"role": "Administrator", "rights": ["Read", "Upsert", "Delete"]}
]
}
填充数据
{
"cloudDBZoneName": "default",
"objectTypeName": "home_product_list",
"objects": [
{
"id": 10,
"goods_list_id": 1,
"url": "在线图片链接",
"name": "红颜草莓",
"price": 10.5,
"original_price": 18.5,
"amount": 10,
"text_message": "特价",
"parameter": "冷藏",
"delivery_time": "付款后24小时内发货",
"endTime": "直降 ｜ 结束时间2025年5月18日 10:00",
"sales_volume": 9812,
"space_id": 10,
"max_loop_amount": 10,
"promotion_spread_price": 5,
"coupon_id": 10
},
{
"id": 20,
"goods_list_id": 1,
"url": "在线图片链接",
"name": "麒麟瓜",
"price": 2.8,
"original_price": 5.9,
"amount": 1,
"text_message": "当季新品",
"parameter": "冷藏",
"delivery_time": "付款后24小时内发货",
"endTime": "直降 ｜ 结束时间2025年5月18日 10:00",
"sales_volume": 9812,
"space_id": 11,
"max_loop_amount": 10,
"promotion_spread_price": 0,
"coupon_id": 10
}
]
}
我们接下来进行数据的查询
@State homeProduct:HomeProductList[]=[]//商品流数据
let databaseZone = cloudDatabase.zone('default');
let home_product=new cloudDatabase.DatabaseQuery(home_product_list);
let list7 = await databaseZone.query(home_product);
let json7 = JSON.stringify(list7)
let data7:HomeProductList[]= JSON.parse(json7)
this.homeProduct=data7
数据查出完成后，完善商品流的页面
import { HomeProductList } from "../entity/home_product_list"
@Component
@Preview
export struct WaterFlowGoods {
@Link goodsList: Array<HomeProductList>
@State columns: number = 2
build() {
WaterFlow() {
ForEach(this.goodsList, (item:HomeProductList, index) => {
FlowItem() {
Column() {
Image(item.url)
.width('100%')
.aspectRatio(1)
.objectFit(ImageFit.Cover)
.borderRadius({topLeft:10,topRight:10})
Column() {
Text(item.name)
.fontSize(16)
.fontColor('#333')
.margin({ bottom: 4 })
Text(item.text_message)
.fontSize(12)
.fontColor('#666')
.margin({ bottom: 8 })
Text("最高立减"+item.promotion_spread_price)
.fontSize(12)
.fontColor('#ffffff')
.visibility(item.promotion_spread_price>0?Visibility.Visible:Visibility.None)
.margin({ bottom: 8 })
.padding({left:5,right:5,top:2,bottom:2})
.linearGradient({
angle:90,
colors: [[0xff0000, 0], [0xff6666, 0.2], [0xff6666, 1]]
})
Row(){
Text("限购")
.width(40)
.fontSize(12)
.borderRadius(20)
.backgroundColor("#FB424C")
.padding(3)
.textAlign(TextAlign.Center)
Text("每人限购"+item.max_loop_amount+"件")
.margin({left:5})
.fontSize(12)
.fontColor("#FB424C")
}
.borderRadius(20)
.padding({top:2,bottom:2,right:10})
.backgroundColor("#FEE3E3")
.visibility(item.amount>0?Visibility.Visible:Visibility.None)
Row() {
Text(){
Span("¥")
.fontColor(Color.Red)
.fontSize(14)
Span(String(item.price))
.fontSize(16)
.fontColor(Color.Red)
}
Text(String(item.original_price))
.fontSize(12)
.fontColor('#999')
.decoration({
type: TextDecorationType.LineThrough,
color: Color.Gray
})
.margin({left:10})
Blank()
Column() {
Image($r('app.media.cart'))
.width(20)
.height(20)
}
.justifyContent(FlexAlign.Center)
.width(36)
.height(36)
.backgroundColor("#ff2bd2fa")
.borderRadius(18)
}
.margin({top:10})
.width('100%')
.justifyContent(FlexAlign.SpaceBetween)
}
.alignItems(HorizontalAlign.Start)
.padding(12)
}
.backgroundColor(Color.White)
.borderRadius(12)
.onClick(() => {
})
}
.margin({ bottom: 12 })
})
}
.padding(10)
.columnsTemplate('1fr 1fr')
.columnsGap(12)
.onAreaChange((oldVal, newVal) => {
this.columns = newVal.width > 600 ? 2 : 1
})
}
}
然后在首页调用，传入参数
WaterFlowGoods({goodsList:this.homeProduct})
到这里我们就实现了首页商品列表的内容
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