《仿盒马》app开发技术分享-- 商品规格弹窗（11）
## **技术栈**
Appgallery connect
## **开发准备**
上一节我们实现了商品详情页面，并且成功在页面上展示了商品的图片、商品规格、活动详情等信息，要知道同一种商品大多数都是有多种型号跟规格的，所以这一节我们来实现商品的规格弹窗。这节的要点是自定义弹窗的运用。
## **功能分析**
规格弹窗，我们的数据源需要根据当前商品的specid当条件去规格表里查询对应的数据，需要我们针对id做一个查询。
弹窗的唤起逻辑是我们点击规格列表时，以及点击加入购物车时，这时候我们再去选择对应的规格
## **代码实现**
先创建对应的表结构
{
"objectTypeName": "product_details_spec",
"fields": [
{"fieldName": "id", "fieldType": "Integer", "notNull": true, "belongPrimaryKey": true},
{"fieldName": "spec_id", "fieldType": "Integer", "notNull": true, "defaultValue": 0},
{"fieldName": "name", "fieldType": "String"},
{"fieldName": "url", "fieldType": "String"},
{"fieldName": "price", "fieldType": "Double"},
{"fieldName": "original_price", "fieldType": "Double"},
{"fieldName": "maxLoopAmount", "fieldType": "Integer"},
{"fieldName": "loopAmount", "fieldType": "Integer"},
{"fieldName": "coupon", "fieldType": "Double"}
],
"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"]}
]
}
然后我们填充几条数据进去，可以暂时不用管一致性
{
"cloudDBZoneName": "default",
"objectTypeName": "product_details_spec",
"objects": [
{
"id": 10,
"spec_id": 10,
"name": "红颜草莓",
"url": "在线图片链接",
"price": 23,
"original_price": 27,
"maxLoopAmount": 8,
"loopAmount": 10,
"coupon": 10
},
{
"id": 20,
"spec_id": 10,
"name": "蓝颜草莓",
"url": "在线图片链接",
"price": 70,
"original_price": 99,
"maxLoopAmount": 20,
"loopAmount": 20,
"coupon": 20
},
{
"id": 30,
"spec_id": 10,
"name": "紫颜草莓",
"url": "在线图片链接",
"price": 19,
"original_price": 33,
"maxLoopAmount": 10,
"loopAmount": 10,
"coupon": 10.5
},
{
"id": 60,
"spec_id": 11,
"name": "麒麟",
"url": "在线图片链接",
"price": 20.5,
"original_price": 20.5,
"maxLoopAmount": 20,
"loopAmount": 20,
"coupon": 20.5
},
{
"id": 70,
"spec_id": 11,
"name": "甜王",
"url": "在线图片链接",
"price": 10.5,
"original_price": 10.5,
"maxLoopAmount": 10,
"loopAmount": 10,
"coupon": 10.5
},
{
"id": 80,
"spec_id": 11,
"name": "早春红玉",
"url": "在线图片链接",
"price": 20.5,
"original_price": 20.5,
"maxLoopAmount": 20,
"loopAmount": 20,
"coupon": 20.5
},{
"id": 90,
"spec_id": 11,
"name": "黑美人",
"url": "在线图片链接",
"price": 10.5,
"original_price": 10.5,
"maxLoopAmount": 10,
"loopAmount": 10,
"coupon": 10.5
}
]
}
紧接着我们根据详情页的id 查询出对应的规格集合
let databaseZone = cloudDatabase.zone('default');
let condition = new cloudDatabase.DatabaseQuery(product_details_spec);
condition.equalTo("spec_id",this.productParams.spec_id)
let listData = await databaseZone.query(condition);
let json = JSON.stringify(listData)
let data:ProductDetailsSpec[]= JSON.parse(json)
this.specList=data
hilog.error(0x0000, 'testTag', `Failed to query data, code: ${this.specList}`);
然后创建自定义弹窗，把查询的数据传入进去进行页面的绘制
import { ProductDetailsSpec } from "../entity/ProductDetailsSpec";
import showToast from "../utils/ToastUtils";
@CustomDialog
export default struct SpecDialog{
@State specList:ProductDetailsSpec[]=[];
controller: CustomDialogController
@State productSpec?:ProductDetailsSpec|null=null
@State @Watch("onChange") checkIndex:number=0
@State selectedItem:number = -1; // 当前选中的位置
@State addNumber:number=1//商品默认添加数量
aboutToAppear(): void {
this.productSpec=this.specList[this.checkIndex]
}
onChange(){
this.productSpec=this.specList[this.checkIndex]
}
build(){
Column({space:10}){
Row(){
Image(this.productSpec?.url)
.height(100)
.width(100)
Column(){
Row(){
Text(){
Span("¥")
.fontSize(16)
.fontColor(Color.Red)
Span(this.productSpec?.price+"")
.fontSize(22)
.fontWeight(FontWeight.Bold)
.padding({top:10})
.fontColor(Color.Red)
}
.margin({left:15})
Text("¥"+String(this.productSpec?.original_price))
.fontSize(16)
.fontColor('#999')
.decoration({
type: TextDecorationType.LineThrough,
color: Color.Gray
})
.margin({left:10})
}
}
Blank()
Image($r('app.media.spec_dialog_close'))
.height(20)
.width(20)
}
.alignItems(VerticalAlign.Top)
.width('100%')
.justifyContent(FlexAlign.SpaceBetween)
Divider().width('90%').height(0.5)
List({space:10}){
ForEach(this.specList,(item:ProductDetailsSpec,index:number)=>{
ListItem(){
Text(item.name)
.backgroundColor(Color.Green)
.padding(3)
.borderRadius(5)
.backgroundColor(this.checkIndex==index?"#FCDB29":Color.Grey)
.fontColor(this.checkIndex==index?"#000000":Color.White)
.onClick(()=>{
this.checkIndex=index
})
}
})
}
.height(50)
.listDirection(Axis.Horizontal)
Row(){
Text("购买数量")
.fontSize(16)
.fontColor(Color.Black)
Blank()
Text(" - ")
.textAlign(TextAlign.Center)
.border({width:0.5,color:Color.Gray})
.fontSize(14)
.height(20)
.padding({left:7,right:7})
.fontColor(Color.Black)
.onClick(()=>{
if (this.addNumber==1) {
showToast("已经是最小数量了～")
}else {
this.addNumber--
}
})
.borderRadius({topLeft:5,bottomLeft:5})
Text(this.addNumber+"")
.textAlign(TextAlign.Center)
.fontColor(Color.Black)
.fontSize(14)
.height(20)
.padding({left:20,right:20})
.border({width:0.5,color:Color.Gray})
Text(" + ")
.textAlign(TextAlign.Center)
.fontColor(Color.Black)
.fontSize(14)
.height(20)
.padding({left:7,right:7})
.onClick(()=>{
this.addNumber++
})
.border({width:0.5,color:Color.Gray})
.borderRadius({topRight:5,bottomRight:5})
}
.width('100%')
.justifyContent(FlexAlign.SpaceBetween)
Row(){
Text("加入购物车")
.width('70%')
.borderRadius(30)
.textAlign(TextAlign.Center)
.fontColor(Color.Black)
.margin({top:70})
.height(40)
.fontSize(18)
.fontWeight(FontWeight.Bold)
.backgroundColor("#FCDB29")
}
.width('100%')
.justifyContent(FlexAlign.Center)
}
.alignItems(HorizontalAlign.Start)
.backgroundColor(Color.White)
.justifyContent(FlexAlign.Start)
.padding(15)
.height(400)
.width('100%')
}
}
创建完成之后我们在详情页面初始化弹窗，把查询的数据传进去
specDialogController:CustomDialogController=new CustomDialogController({
builder:SpecDialog({
specList:this.specList
}),
alignment: DialogAlignment.Bottom,
customStyle:true
})
调用弹窗
this.specDialogController.open()
执行代码看看效果
到这里我们的弹窗就实现了
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