dart - 您可以在关闭时收听 ShowBottomSheet 吗？

Question

想象一下创建一个底部工作表如下:

final PersistenBottomSheetController bottomSheetController = showBottomSheet(...);

如何在关闭那个底部工作表时执行逻辑？

Answer 1

对于 Flutter widgets 来说有点单调:
bottomSheetController.closed 在关闭底部工作表时返回一个 Future，这允许以下逻辑:

bottomSheetController.closed.then((value) {
  // this callback will be executed on close
});

await 也适用:

await bottomSheetController.closed;
// code below this call will get executed upon close