HarmonyOS 鸿蒙Next成就系统与通知机制

成就系统通过追踪用户行为，自动检测并解锁成就，提升用户粘性。

成就定义与检测：

// 成就定义
const ACHIEVEMENT_DEFINITIONS: Achievement[] = [
  { id: 'first_question', name: '初出茅庐', condition: 'questions', targetValue: 1 },
  { id: 'questions_100', name: '百题斩', condition: 'questions', targetValue: 100 },
  { id: 'exam_pass', name: '首战告捷', condition: 'exam_pass', targetValue: 1 },
  { id: 'streak_7', name: '一周坚持', condition: 'streak', targetValue: 7 },
  { id: 'accuracy_90', name: '神枪手', condition: 'accuracy', targetValue: 90 }
];

class AchievementService {
  // 检查并解锁成就
  async checkAndUnlock(): Promise<Achievement[]> {
    const newlyUnlocked: Achievement[] = [];
    for (const def of ACHIEVEMENT_DEFINITIONS) {
      if (await this.isUnlocked(def.id)) continue;
      const progress = await this.getProgress(def);
      if (progress >= def.targetValue) {
        await this.unlock(def.id);
        newlyUnlocked.push({
          ...def,
          isUnlocked: true,
          unlockTime: Date.now(),
          progress: progress
        });
      }
    }
    return newlyUnlocked;
  }
  // 获取成就进度
  private async getProgress(def: Achievement): Promise<number> {
    switch (def.condition) {
      case 'questions':
        return await this.getCompletedQuestionCount();
      case 'exams':
        return await this.getExamCount();
      case 'streak':
        return await this.getCurrentStreak();
      case 'accuracy':
        return await this.getOverallAccuracy();
      default:
        return 0;
    }
  }
  // 实时检测并通知
  async checkAndNotify(): Promise<void> {
    const newlyUnlocked = await this.checkAndUnlock();
    for (const achievement of newlyUnlocked) {
      achievementNotificationService.notify(achievement);
      Logger.info(`Achievement unlocked: ${achievement.name}`);
    }
  }
}

成就通知实现：

class AchievementNotificationService {
  notify(achievement: Achievement): void {
    // 显示Toast通知
    promptAction.showToast({
      message: `🎉 解锁成就：${achievement.name}`,
      duration: 3000,
      bottom: 200
    });
    // 可以扩展为更丰富的通知UI
    // 如弹窗、动画效果等
  }
}