有什么办法可以在 flutter 中实现下拉应用栏？

Question

Can anyone suggest to me how can I build a pull-down appbar. I searched the whole net but can't find any idea regarding this. It would be great if anyone could guide or suggest to me to build the appbar.

Edit:- Many developers are saying to use SliverAppBar. SliverAppBar basically collapses the app bar when we scroll up the listview or any other widget, whereas I want an app bar that pulls down ie when we tap the app bar and scroll it down only the app bar grows on top of the body. So basically when we navigate to the home screen the app bar should look like the second referred image ie it must be closed. But we can pull down that appbar to view the hidden contents of the appbar. I am attaching an image for reference.

Answer 1

I Think what you mean what pull down App is an Appbar that expands try.

the silver Appbar https://youtu.be/mSc7qFzxHDw