鸿蒙电商购物车全栈项目:用户管理、商品列表与购物车实现
在构建鸿蒙电商应用时,核心业务模块的稳定性直接决定了用户体验。本篇将深入讲解用户管理、商品列表展示以及购物车逻辑的全栈实现细节,涵盖从数据层到视图层的完整链路。
用户管理架构与设计
用户系统是电商应用的基石。我们采用分层架构来解耦业务逻辑与数据存储,主要包括用户服务层、数据层、接口层和展示层。这种设计不仅便于维护,也为后续扩展权限管理预留了空间。
1. 用户注册与登录
注册与登录是用户进入系统的第一道关卡。我们需要封装工具类来处理异步请求,确保单例模式下的状态一致性。
工具类实现
import user from '@ohos.user';
export class UserRegistrationUtil {
private static instance: UserRegistrationUtil | null = null;
private userHelper: user.UserHelper | null = null;
static getInstance(): UserRegistrationUtil {
if (!UserRegistrationUtil.instance) {
UserRegistrationUtil.instance = new UserRegistrationUtil();
}
return UserRegistrationUtil.instance;
}
async init(): Promise<void> {
if (!this.userHelper) {
this.userHelper = user.createUserHelper();
}
}
async register(email: string, password: string): Promise<user.UserRegistrationResult> {
if (!this.userHelper) return null;
const result = await this.userHelper.register(email, password);
return result;
}
async sendVerificationCode(email: string): Promise<user.SendVerificationCodeResult> {
if (!this.userHelper) return null;
const result = await this.userHelper.sendVerificationCode(email);
return result;
}
}
页面交互逻辑
在 RegistrationPage 中,我们通过状态管理绑定输入框,并在点击按钮时触发工具类方法。注意处理验证码发送后的防抖逻辑,避免频繁请求。
import { UserRegistrationUtil } from '../utils/UserRegistrationUtil';
@Entry
@Component
struct RegistrationPage {
@State email: string = '';
@State password: string = '';
@State verificationCode: string = '';
build() {
Column({ space: 16 }) {
InputComponent({ placeholder: '请输入邮箱', value: this.email, onChange: (value: string) => { this.email = value; }, type: InputType.Email });
InputComponent({ placeholder: '请输入密码', value: this.password, onChange: (value: string) => { this.password = value; }, type: InputType.Password });
InputComponent({ placeholder: '请输入验证码', value: this.verificationCode, onChange: (value: string) => { this.verificationCode = value; }, type: InputType.Normal });
ButtonComponent({ text: '发送验证码', onClick: async () => { await this.sendVerificationCode(); }, disabled: !this.email });
ButtonComponent({ text: '注册', onClick: async () => { await this.register(); }, disabled: !this.email || !this.password || !this.verificationCode });
}.width('100%').height('100%').padding(16).backgroundColor('#F5F5F5');
}
aboutToAppear() {
UserRegistrationUtil.getInstance().init();
}
async sendVerificationCode(): Promise<void> {
const result = await UserRegistrationUtil.getInstance().sendVerificationCode(this.email);
if (result.success) {
promptAction.showToast({ message: '验证码发送成功' });
} else {
promptAction.showToast({ message: '验证码发送失败' });
}
}
async register(): Promise<void> {
const result = await UserRegistrationUtil.getInstance().register(this.email, this.password);
if (result.success) {
promptAction.showToast({ message: '注册成功' });
router.pushUrl({ url: '/pages/LoginPage' });
} else {
promptAction.showToast({ message: '注册失败' });
}
}
}


