feat:增加提醒事项

lib/service/reminder_service.dart

@@ -0,0 +1,39 @@
+import 'package:flisp_app/models/reminder.dart';
+import 'package:hive_flutter/hive_flutter.dart';
+
+class ReminderService {
+  static const String boxName = 'reminders';
+
+  Box<Reminder> get box => Hive.box<Reminder>(boxName);
+
+  Future<bool> addReminder(Reminder reminder) async {
+    try {
+      await box.add(reminder);
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  List<Reminder> getAllReminders() {
+    return box.values.toList();
+  }
+
+  Future<bool> updateReminder(Reminder reminder) async {
+    try {
+      await reminder.save();
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  Future<bool> deleteReminder(Reminder reminder) async {
+    try {
+      await reminder.delete();
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+}