《仿盒马》app开发技术分享-- 金刚区（3）
技术栈
Appgallery connect
开发准备
上一篇文章中我们实现了项目端云一体化新人专享券活动模块，数据也成功的从云端获取，现在我们开始继续向下，实现金刚区模块
功能分析金刚区的实现我们之前已经完成了，但是数据的获取都是本地的静态数据，现在我们要获取云端的数据，实现数据的展示，同时要把滚动跟bar 关联起来，让用户能看到当前滑动到什么位置
代码实现
首先我们进行表、数据、实体、db类的创建
{"objectTypeName": "split_layout","fields": [{"fieldName": "split_id", "fieldType": "Integer", "notNull": true, "belongPrimaryKey": true},{"fieldName": "txt", "fieldType": "String"},{"fieldName": "url", "fieldType": "String"},{"fieldName": "router", "fieldType": "String"},{"fieldName": "is_login", "fieldType": "Boolean"},{"fieldName": "bt_state", "fieldType": "Integer"}],"indexes": [{"indexName": "splitId_Index", "indexList": [{"fieldName":"split_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"]}]}
数据{"cloudDBZoneName": "default","objectTypeName": "split_layout","objects": [{"split_id": 10,"txt": "果蔬肉禽","url": "在线图片链接","router": "string1","is_login": false,"bt_state": 0},{"split_id": 20,"txt": "冷冻水产","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 30,"txt": "乳品烘焙","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 40,"txt": "粮油面点","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 50,"txt": "酒水饮料","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 60,"txt": "休闲零食","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 70,"txt": "婴宠保健","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 80,"txt": "美妆个护","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 90,"txt": "纸品清洁","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 101,"txt": "百货家电","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 102,"txt": "家纺服饰","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0},{"split_id": 201,"txt": "跨境免税","url": "在线图片链接","router": "string2","is_login": false,"bt_state": 0}]}
db类
import { cloudDatabase } from **********';
class split_layout extends cloudDatabase.DatabaseObject {public split_id: number;public txt: string;public url: string;public router: string;public is_login: boolean;public bt_state: number;
public naturalbase_ClassName(): string {return 'split_layout';}}
export { split_layout };
实体类/*
- Copyright (c) Huawei Technologies Co., Ltd. 2020-2023. All rights reserved.
- Generated by the CloudDB ObjectType compiler. DO NOT EDIT! */
export class SplitLayoutModel {split_id: number;txt: string;url: string;router: string;is_login: boolean;bt_state: number;
constructor() {
}
getFieldTypeMap(): Map<string, string> {
let fieldTypeMap = new Map<string, string>();
fieldTypeMap.set('split_id', 'Integer');
fieldTypeMap.set('txt', 'String');
fieldTypeMap.set('url', 'String');
fieldTypeMap.set('router', 'String');
fieldTypeMap.set('is_login', 'Boolean');
fieldTypeMap.set('bt_state', 'Integer');
return fieldTypeMap;
}
getClassName(): string {
return 'split_layout';
}
getPrimaryKeyList(): string[] {
let primaryKeyList: string[] = [];
primaryKeyList.push('split_id');
return primaryKeyList;
}
getIndexList(): string[] {
let indexList: string[] = [];
return indexList;
}
getEncryptedFieldList(): string[] {
let encryptedFieldList: string[] = [];
return encryptedFieldList;
}
setSplit_id(split_id: number): void {
this.split_id = split_id;
}
getSplit_id(): number {
return this.split_id;
}
setTxt(txt: string): void {
this.txt = txt;
}
getTxt(): string {
return this.txt;
}
setUrl(url: string): void {
this.url = url;
}
getUrl(): string {
return this.url;
}
setRouter(router: string): void {
this.router = router;
}
getRouter(): string {
return this.router;
}
setIs_login(is_login: boolean): void {
this.is_login = is_login;
}
getIs_login(): boolean {
return this.is_login;
}
setBt_state(bt_state: number): void {
this.bt_state = bt_state;
}
getBt_state(): number {
return this.bt_state;
}
static parseFrom(inputObject: any): SplitLayoutModel {
let result = new SplitLayoutModel();
if (!inputObject) {
return result;
}
if (inputObject.split_id) {
result.split_id = inputObject.split_id;
}
if (inputObject.txt) {
result.txt = inputObject.txt;
}
if (inputObject.url) {
result.url = inputObject.url;
}
if (inputObject.router) {
result.router = inputObject.router;
}
if (inputObject.is_login) {
result.is_login = inputObject.is_login;
}
if (inputObject.bt_state) {
result.bt_state = inputObject.bt_state;
}
return result;
}
}
然后把这些内容同步到云端
一切都完成之后，我们进行页面逻辑的修改
import { SplitLayoutModel } from "../entity/SplitLayoutModel"
@Preview@Componentexport struct SplitLayout {@Link listData: SplitLayoutModel[]private scroller: Scroller = new Scroller()build() {Column() {Grid(this.scroller){ForEach(this.listData, (item:SplitLayoutModel) => {GridItem(){Column() {Image(item.url).width(45).height(45).borderRadius(24).margin({ top: 5 })Text(item.txt).padding(2).fontSize(16).fontColor(Color.Black).textAlign(TextAlign.Center)}}})}.scrollBar(BarState.Off).rowsTemplate('1fr 1fr').rowsGap(15).columnsGap(10).height(150)
ScrollBar({ scroller: this.scroller, direction: ScrollBarDirection.Horizontal,state: BarState.Auto }) {
Text()
.width(40)
.height(10)
.borderRadius(10)
.backgroundColor('#ff34a8e5')
}
.borderRadius(5)
.margin({top:10})
.width(100)
.backgroundColor('#ededed')
}
.alignItems(HorizontalAlign.Center)
.height(190)
.width('95%')
.margin({top:20})
.backgroundColor('#ffeedeb8')
.padding(16)
.borderRadius(20)
}}然后在主页调用组件先创建一个接收数据变量@State splitList:SplitLayoutModel[]=[]
SplitLayout({listData:this.splitList})
进行数据查询和赋值
let databaseZone = cloudDatabase.zone('default');
let listData2 = await databaseZone.query(condition2);
let json2 = JSON.stringify(listData2)
let data2:SplitLayoutModel[]= JSON.parse(json2)
this.splitList=data2
到这里我们的金刚区就实现了
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