我如何去除脚手架中的晶圆厂底部填充物

Question

在脚手架中用作 fab 的小部件
默认情况下似乎有填充

见飞镖示例

import 'package:flutter/material.dart';

void main() => runApp(
      MaterialApp(
        home: Scaffold(
          floatingActionButtonLocation:
              FloatingActionButtonLocation.centerFloat,
          floatingActionButton: Padding(
            padding: EdgeInsets.zero,
            child: Container(height: 56, color: Colors.red),
          ),
        ),
      ),
    );

如何去除红色容器底部的填充物？

当前（蹩脚的）解决方法是

import 'package:flutter/material.dart';

void main() => runApp(
      MaterialApp(
        home: Scaffold(
          floatingActionButtonLocation:
              FloatingActionButtonLocation.centerFloat,
+         bottomSheet: Container(height: 16, color: Colors.red),
          floatingActionButton: Padding(
            padding: EdgeInsets.zero,
            child: Container(height: 56, color: Colors.red),
          ),
        ),
      ),
    );

Answer 1

只需更改浮动操作按钮位置：

floatingActionButtonLocation: 
              FloatingActionButtonLocation.centerFloat

到

floatingActionButtonLocation:
              FloatingActionButtonLocation.centerDocked,

结果：