大型项目实践：某银行App用CodeGenie重构HarmonyOS5版的启示

以下为 ​​某银行App使用CodeGenie重构HarmonyOS 5版的完整技术实践​​，包含架构设计、关键模块实现与效能提升的ArkTS代码示例：

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1. 重构架构设计

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2. 核心模块重构

2.1 账户卡片组件

// AccountCard.ets
@Component
struct AccountCard {
  @Prop account: AccountInfo;
  @State isFolded: boolean = true;

  build() {
    Column() {
      // 顶部账户信息
      Row() {
        Image(this.account.icon)
          .width(40)
        Text(this.account.name)
          .fontSize(18)
        Toggle()
          .onChange(() => this.isFolded = !this.isFolded)
      }

      // 可折叠详情
      if (!this.isFolded) {
        BalanceView(account.balance)
        TransactionButtons()
      }
    }
    .cardStyle() // 应用银行统一卡片样式
  }
}

// 使用示例
@Builder
function AccountList(accounts: AccountInfo[]) {
  ForEach(accounts, (account) => {
    AccountCard({ account })
      .margin({ bottom: 12 })
  })
}

2.2 交易流水列表

// TransactionList.ets
@Component
struct TransactionList {
  @Link transactions: Transaction[];

  build() {
    List({ space: 12 }) {
      ForEach(this.transactions, (item) => {
        ListItem() {
          TransactionItem({ data: item })
        }
        .swipeAction({
          end: this.getSwipeActions(item)
        })
      })
    }
    .onReachEnd(() => this.loadMore())
  }

  @Builder
  getSwipeActions(item: Transaction) {
    Button('删除')
      .onClick(() => this.removeItem(item))
      .backgroundColor('#ff4d4f')
  }
}

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3. 金融安全加固

3.1 安全键盘组件

// SecureKeyboard.ets
@Component
struct SecureKeyboard {
  @State private keys: string[][] = [
    ['1', '2', '3'],
    ['4', '5', '6'],
    ['7', '8', '9'],
    ['', '0', '⌫']
  ];

  build() {
    Grid() {
      ForEach(this.keys, (row) => {
        ForEach(row, (key) => {
          SecureKey(key)
            .onClick(() => this.onKeyPress(key))
        })
      })
    }
    .randomizeLayout() // 每次渲染打乱键位
  }

  private onKeyPress(key: string) {
    if (key === '⌫') {
      this.$emit('delete');
    } else {
      this.$emit('input', key);
    }
  }
}

3.2 生物认证集成

// BiometricAuth.ets
async function verifyBiometric(): Promise<boolean> {
  try {
    const result = await userAuth.verify({
      type: [userAuth.UserAuthType.FACE, userAuth.UserAuthType.FINGERPRINT],
      challenge: 'bank_transaction_2023'
    });
    return result.authResult === userAuth.AuthResult.SUCCESS;
  } catch (err) {
    Logger.error('生物认证失败', err);
    return false;
  }
}

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4. 性能优化实践

4.1 数据懒加载

// LazyLoader.ets
@Component
struct LazyLoadList {
  @State loadedItems: number = 10;
  
  build() {
    List() {
      ForEach(Array(this.loadedItems).keys(), (index) => {
        ListItem() {
          TransactionSkeleton() // 骨架屏占位
            .onAppear(() => {
              if (index === this.loadedItems - 2) {
                this.loadedItems += 5;
              }
            })
        }
      })
    }
  }
}

4.2 缓存策略

// CacheManager.ets
class AccountCache {
  private static cache = new LruCache<string, AccountData>(100);

  static async getAccount(id: string): Promise<AccountData> {
    if (this.cache.has(id)) {
      return this.cache.get(id)!;
    }

    const data = await BankAPI.fetchAccount(id);
    this.cache.set(id, data);
    return data;
  }
}

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5. 动效与交互优化

5.1 转账过程动画

// TransferAnimation.ets
@Component
struct TransferProgress {
  @State private progress: number = 0;

  build() {
    Stack() {
      CircularProgress({ value: this.progress * 100 })
      
      Button('取消')
        .onClick(() => this.cancel())
        .position({ bottom: 30 })
    }
    .onAppear(() => {
      animateTo({
        duration: 2000,
        curve: 'easeInOut'
      }, () => {
        this.progress = 1;
      });
    })
  }
}

5.2 手势操作

// GestureHandler.ets
@Component
struct SwipeToRefresh {
  @State offsetY: number = 0;

  build() {
    Stack() {
      List() { /* ... */ }
        .gesture(
          PanGesture({ direction: PanGestureDirection.Vertical })
            .onActionUpdate((event) => {
              if (event.offsetY > 0) {
                this.offsetY = event.offsetY;
              }
            })
            .onActionEnd(() => {
              if (this.offsetY > 100) {
                this.$emit('refresh');
              }
              animateTo({ duration: 300 }, () => {
                this.offsetY = 0;
              });
            })
        )
      
      RefreshIndicator({ progress: this.offsetY / 100 })
    }
  }
}

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6. 关键重构数据对比

指标	重构前(Android)	重构后(ArkTS)	提升
启动时间(ms)	1200	650	46%
内存占用(MB)	280	175	38%
转账页面FPS	48	60	25%
代码行数	152k	89k	41%

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7. 持续集成方案

7.1 安全扫描

# .gitlab-ci.yml
security_scan:
  stage: test
  script:
    - codegenie scan --security --ruleset bank-security-rules.json

7.2 性能基准测试

# 运行性能测试套件
codegenie benchmark --scenarios="startup,transfer,list-scroll"

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8. 经验总结

1. ​​组件化收益​​：通过@Component重构，代码复用率提升60%
2. ​​类型安全优势​​：TypeScript静态类型检查减少35%运行时错误
3. ​​声明式UI效率​​：UI开发时间缩短40%
4. ​​工具链支持​​：CodeGenie自动转换覆盖85%业务逻辑代码