update

lib/config/common_colors.dart

@@ -18,4 +18,8 @@ class CommonColor {
   static Color get color99 => const Color(0xFF999999);
 
   static Color get colorEE => const Color(0xFFEEEEEE);
+
+  static Color get color66 => const Color(0xFF666666);
+
+  static Color get colorCC => const Color(0xFFCCCCCC);
 }

lib/utils/keep_alive_wrapper.dart

+import 'package:flutter/material.dart';
+
+class KeepAliveWrapper extends StatefulWidget {
+  const KeepAliveWrapper({
+    Key? key,
+    this.keepAlive = true,
+    required this.child,
+  }) : super(key: key);
+  final bool keepAlive;
+  final Widget child;
+
+  @override
+  _KeepAliveWrapperState createState() => _KeepAliveWrapperState();
+}
+
+class _KeepAliveWrapperState extends State<KeepAliveWrapper>
+    with AutomaticKeepAliveClientMixin {
+  @override
+  Widget build(BuildContext context) {
+    super.build(context);
+    return widget.child;
+  }
+
+  @override
+  void didUpdateWidget(covariant KeepAliveWrapper oldWidget) {
+    if (oldWidget.keepAlive != widget.keepAlive) {
+      // keepAlive 状态需要更新，实现在 AutomaticKeepAliveClientMixin 中
+      updateKeepAlive();
+    }
+    super.didUpdateWidget(oldWidget);
+  }
+
+  @override
+  bool get wantKeepAlive => widget.keepAlive;
+}