1、Scaffold增加floatingActionButton属性

lib/widget/my_scaffold.dart

@@ -14,6 +14,7 @@ class MyScaffold extends StatelessWidget {
   final Widget? bottomButton;
   final CrossAxisAlignment crossAxisAlignment;
   final KeyboardActionsConfig? keyboardConfig;
+  final Widget? floatingActionButton;
 
   const MyScaffold({
     Key? key,
@@ -26,6 +27,7 @@ class MyScaffold extends StatelessWidget {
     this.bottomButton,
     this.crossAxisAlignment = CrossAxisAlignment.start,
     this.keyboardConfig,
+    this.floatingActionButton,
   }) : super(key: key);
 
   @override
@@ -41,6 +43,7 @@ class MyScaffold extends StatelessWidget {
             keyboardConfig: keyboardConfig,
             children: children ?? [],
           ),
+      floatingActionButton: floatingActionButton,
     );
   }
 }