Flutter 软键盘弹出时Dialog上移

使用布局外层使用Scaffold即可

showDialog(
        context: context,
        builder: (_) {
          return Scaffold(
            backgroundColor: Colors.transparent,
            body: Center(
              child: SingleChildScrollView(
                child: Column(
                  children: <Widget>[

                  ],
                ),
              ),
            ),
          );
        });