feat(item): 添加物品删除功能并优化物品详情页面

- 在 DetailItemScreen 中添加删除物品的按钮和确认对话框
- 在 ItemProvider 中实现删除物品的方法
- 在 ItemRepository 中实现删除物品的数据库操作
- 在 ItemModel 中添加 status 字段，用于标记物品状态

lib/database/item_table.dart

@@ -7,6 +7,7 @@ CREATE TABLE items (
   description TEXT,
   purchase_date TEXT,
   is_in_use TEXT DEFAULT 'no',
+  status TEXT DEFAULT 'normal',
   created_at TEXT DEFAULT (datetime('now')),
   updated_at TEXT DEFAULT (datetime('now'))
 );

lib/models/item_model.dart

@@ -12,7 +12,11 @@ class Item {
   final DateTime? purchaseDate;
   // 是否使用
   final String? isInUse;
+  // 数据状态 -normal -deleted
+  final String? status;
+  // 创建时间
   final DateTime? createdAt;
+  // 更新时间
   final DateTime? updatedAt;
 
   Item({
@@ -23,6 +27,7 @@ class Item {
     this.description,
     this.purchaseDate,
     this.isInUse = 'no',
+    this.status = 'normal',
     this.createdAt,
     this.updatedAt,
   });
@@ -35,6 +40,7 @@ class Item {
       'description': description,
       'purchase_date': purchaseDate,
       'is_in_use': isInUse,
+      'status': status,
       'created_at': createdAt,
       'updated_at': updatedAt,
     };
@@ -49,6 +55,7 @@ class Item {
       description: map['description'],
       purchaseDate: map['purchase_date'],
       isInUse: map['is_in_use'],
+      status: map['status'],
       createdAt: map['created_at'],
       updatedAt: map['updated_at'],
     );

lib/provider/item_provider.dart

@@ -21,4 +21,14 @@ class ItemProvider extends ChangeNotifier {
     await repository.insertItem(item);
     await loadItems(); // 插入后刷新
   }
+
+  Future<void> updateItem(Item item) async {
+    await repository.updateItem(item);
+    await loadItems(); // 更新后刷新
+  }
+
+  Future<void> deleteItem(Item item) async {
+    await repository.deleteItem(item);
+    await loadItems(); // 删除后刷新
+  }
 }

lib/repository/item_repository.dart

@@ -7,13 +7,41 @@ class ItemRepository {
 
   ItemRepository({required this.dbHelper});
 
+  /**
+   * 插入一条数据
+   */
   Future<int> insertItem(Item item) async {
     final db = await dbHelper.database;
     return await db.insert('items', item.toMap());
   }
 
+  /**
+   * 查询所有数据
+   */
   Future<List<Map<String, dynamic>>> getAllItems() async {
     final db = await dbHelper.database;
-    return await db.query('items');
+    return await db.query('items', where: 'status = ?', whereArgs: ['normal']);
+  }
+
+  /**
+   * 更新数据
+   */
+  Future<int> updateItem(Item item) async {
+    final db = await dbHelper.database;
+    return await db.update(
+      'items',
+      item.toMap(),
+      where: 'id = ?',
+      whereArgs: [item.id],
+    );
+  }
+
+  /**
+   * 删除数据
+   */
+  Future<int> deleteItem(Item item) async {
+    final db = await dbHelper.database;
+    return await db.update('items', {'status': 'delete'},
+        where: 'id = ?', whereArgs: [item.id]);
   }
 }

lib/screens/item_screens/add_item_screen.dart

@@ -207,6 +207,7 @@ class _FromTestRouteSate extends State<AddItemScreen> {
                     Provider.of<ItemProvider>(context, listen: false)
                         .addItem(newItem);
 
+                    // 弹窗提示添加成功
                     ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                       content: Text('提交成功'),
                       duration: Duration(seconds: 1),

lib/screens/item_screens/detail_item_screen.dart

@@ -1,5 +1,9 @@
+import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:item_tracker/models/item_model.dart';
+import 'package:provider/provider.dart';
+
+import '../../provider/item_provider.dart';
 
 class DetailItemScreen extends StatelessWidget {
   final Item item;
@@ -14,14 +18,55 @@ class DetailItemScreen extends StatelessWidget {
       ),
       body: Padding(
           padding: EdgeInsets.all(16.0),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
+          child:
+              Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
             Text('名称: ${item.toMap().toString()}'),
-            Text('描述: ${item.description}')
-          ]
-        )
-      )
+            Text('描述: ${item.description}'),
+            ElevatedButton(
+              child: Padding(
+                padding: const EdgeInsets.all(16.0),
+                child: Text("删除"),
+              ),
+              onPressed: () {
+                showCupertinoDialog(
+                    context: context,
+                    builder: (context) {
+                      return CupertinoAlertDialog(
+                          title: Text('提示'),
+                          content: Text('确定要删除吗？'),
+                          actions: [
+                            CupertinoDialogAction(
+                              child: Text('取消'),
+                              onPressed: () {
+                                Navigator.pop(context);
+                              },
+                            ),
+                            CupertinoDialogAction(
+                                child: Text('确定'),
+                                onPressed: () {
+                                  Provider.of<ItemProvider>(context,
+                                          listen: false)
+                                      .deleteItem(item);
+
+                                  // 弹窗提示删除成功
+                                  ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+                                    content: Text('删除成功'),
+                                    duration: Duration(seconds: 1),
+                                  ));
+                                  Navigator.pop(context);
+                                  Navigator.pop(context);
+                                })
+                          ]);
+                    });
+              },
+              style: ElevatedButton.styleFrom(
+                shape: RoundedRectangleBorder(
+                  borderRadius: BorderRadius.circular(8.0),
+                ),
+                elevation: 4.0,
+              ),
+            ),
+          ])),
     );
   }
 }