feat(search): 为TIMUIKitSearch组件增加无数据状态提示

lib/ui/views/TIMUIKitSearch/pureUI/tim_uikit_search_empty.dart

@@ -0,0 +1,51 @@
+import 'package:flutter/material.dart';
+import 'package:tencent_cloud_chat_uikit/base_widgets/tim_ui_kit_base.dart';
+import 'package:tencent_cloud_chat_uikit/base_widgets/tim_ui_kit_statelesswidget.dart';
+
+class TIMUIKitSearchEmpty extends TIMUIKitStatelessWidget {
+  final String? keyword;
+
+  TIMUIKitSearchEmpty({Key? key, this.keyword}) : super(key: key);
+
+  @override
+  Widget tuiBuild(BuildContext context, TUIKitBuildValue value) {
+    final theme = value.theme;
+
+    return Container(
+      padding: const EdgeInsets.symmetric(vertical: 60, horizontal: 40),
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          Icon(
+            Icons.inbox_outlined,
+            size: 64,
+            color: theme.weakTextColor?.withOpacity(0.5),
+          ),
+          const SizedBox(height: 16),
+          Text(
+            keyword != null && keyword!.isNotEmpty
+                ? "未找到与\"$keyword\"相关的内容"
+                : "暂无搜索结果",
+            style: TextStyle(
+              fontSize: 16,
+              color: theme.weakTextColor,
+              fontWeight: FontWeight.w500,
+            ),
+            textAlign: TextAlign.center,
+          ),
+          if (keyword == null || keyword!.isEmpty) ...[
+            const SizedBox(height: 8),
+            Text(
+              "请输入关键词进行搜索",
+              style: TextStyle(
+                fontSize: 14,
+                color: theme.weakTextColor?.withOpacity(0.7),
+              ),
+              textAlign: TextAlign.center,
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+}

lib/ui/views/TIMUIKitSearch/tim_uikit_search.dart

@@ -15,8 +15,9 @@ import 'package:tencent_cloud_chat_uikit/data_services/services_locatar.dart';
 import 'package:tencent_cloud_chat_uikit/business_logic/view_models/tui_search_view_model.dart';
 import 'package:tencent_cloud_chat_uikit/ui/utils/platform.dart';
 import 'package:tencent_cloud_chat_uikit/ui/views/TIMUIKitSearch/pureUI/tim_uikit_search_indicator.dart';
-import 'package:tencent_cloud_chat_uikit/ui/views/TIMUIKitSearch/tim_uikit_search_friend.dart';
+import 'package:tencent_cloud_chat_uikit/ui/views/TIMUIKitSearch/pureUI/tim_uikit_search_empty.dart';
 import 'package:tencent_cloud_chat_uikit/ui/views/TIMUIKitSearch/pureUI/tim_uikit_search_input.dart';
+import 'package:tencent_cloud_chat_uikit/ui/views/TIMUIKitSearch/tim_uikit_search_friend.dart';
 import 'package:tencent_cloud_chat_uikit/ui/views/TIMUIKitSearch/tim_uikit_search_group.dart';
 import 'package:tencent_cloud_chat_uikit/ui/views/TIMUIKitSearch/tim_uikit_search_msg.dart';
 import 'package:tencent_cloud_chat_uikit/tencent_cloud_chat_uikit.dart';
@@ -119,14 +120,18 @@ class TIMUIKitSearchState extends TIMUIKitState<TIMUIKitSearch> {
                         if ((friendResultList.isEmpty || !(searchTypes.contains(SearchType.contact))) &&
                             (groupList.isEmpty || !(searchTypes.contains(SearchType.group))) &&
                             (totalMsgCount == 0 || !(searchTypes.contains(SearchType.history))))
-                          TIMUIKitSearchIndicator(
+                          textEditingController.text.isEmpty
-                            typeList: searchTypes,
+                              ? TIMUIKitSearchIndicator(
-                            onChange: (list) {
+                                  typeList: searchTypes,
-                              setState(() {
+                                  onChange: (list) {
-                                searchTypes = list;
+                                    setState(() {
-                              });
+                                      searchTypes = list;
-                            },
+                                    });
-                          ),
+                                  },
+                                )
+                              : TIMUIKitSearchEmpty(
+                                  keyword: textEditingController.text,
+                                ),
                         if (searchTypes.contains(SearchType.contact))
                           TIMUIKitSearchFriend(
                               onTapConversation: (conversation, message) {