《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