颤振中弯曲的固定(柔性)和拉伸(扩展)元件

Flexible Expanded 在一个 Column 会使 有孩子那么大 占去剩下的全部空间。然而 不会填满所有剩余的空间,并在其后留下一些空白空间。

+-----------------------------+
| Flexible, decides own size. |
+-----------------------------+
| Expanded, fills up the rest |
|                             |
|                             |
|                             |
|                             |
|                             |
|                             |
|                             |
|                             |
|                             |
+-----------------------------+

+-----------------------------+
| Flexible, decides own size. |
+-----------------------------+
| Expanded, takes up only     |
| some of the remaining space |
| looks like about 50% of     |
| the whole parent            |
|                             |
|                             |
+-----------------------------+
| LOL here's unused space     |
| for no good reason          |
|                             |
+-----------------------------+

我怀疑我自己,然后我看到了同样的事情作为一个连续的错误报告: https://github.com/flutter/flutter/issues/20575

我想我的问题是,我怎么能有一个固定大小的小部件 ,然后是一个小部件,它占用了父对象的其余部分?