1、MyPageAppBar增加属性titleWidget

lib/widget/my_app_bar.dart

@@ -11,6 +11,7 @@ class MyPageAppBar extends StatelessWidget implements PreferredSizeWidget {
   final bool exitApp;
   final Widget? leading;
   final double? elevation;
+  final Widget? titleWidget;
 
   const MyPageAppBar({
     Key? key,
@@ -24,6 +25,7 @@ class MyPageAppBar extends StatelessWidget implements PreferredSizeWidget {
     this.exitApp = false,
     this.leading,
     this.elevation = 0,
+    this.titleWidget,
   }) : super(key: key);
 
   @override
@@ -31,7 +33,7 @@ class MyPageAppBar extends StatelessWidget implements PreferredSizeWidget {
     return AppBar(
       key: key,
       centerTitle: true,
-      title: Text(title ?? "", style: TextStyle(color: foregroundColor)),
+      title: titleWidget ?? Text(title ?? "", style: TextStyle(color: foregroundColor)),
       backgroundColor: backgroundColor,
       foregroundColor: foregroundColor,
       primary: primary,