“Tutorial do botão de menu pop -up do fleto pop -up” Respostas de código

Tutorial do botão de menu pop -up do fleto pop -up

PopupMenuButton(
        itemBuilder: (BuildContext context) => <PopupMenuEntry>[
          const PopupMenuItem(
            child: Text('Option1'),
          ),
          const PopupMenuItem(
            child: Text('Option2'),
          ),
          const PopupMenuItem(
            child: Text('Option3'),
          ),