Delay in Reopening Sheet After Dismissal

[ammerzon]

Description

I am unsure if this is a bug or standard SwiftUI behavior. It might be related to issue #3045.

Here's a simple example: on a home screen, when a button is clicked, a sheet opens. After dismissing the sheet, clicking the button again doesn't work immediately; there is a delay of a few seconds before it responds. I suspect the state hasn't changed to nil, preventing the sheet from opening immediately. Is this a known issue?

Checklist

• I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

The sheet opens the first time a button is clicked after dismissing the sheet.

Actual behavior

The sheet can't be shown immediately again, but the user must wait a bit.

Steps to reproduce

behaviour.mp4

Sheet Bug Project.zip

The Composable Architecture version information

1.11.2

Destination operating system

iOS 17.5

Xcode version information

15.4

Swift Compiler version information

swift-driver version: 1.90.11.1 Apple Swift version 5.10 (swiftlang-5.10.0.13 clang-1500.3.9.4)
Target: arm64-apple-macosx14.0

[mbrandonw]

Hi @ammerzon, this is just how SwiftUI works. If you were to recreate the demo in vanilla SwiftUI you would find that you cannot present a sheet until the existing sheet has fully dismissed.

Since this isn't an issue with the library I am going to convert it to a discussion. Please feel free to continue the conversation over there!

[ammerzon]

Thank you for the information. Do you know whether this state change can be triggered earlier?

[mbrandonw]

I don't think it's just a matter of getting the state to change earlier. UIKit/SwiftUI also have the problem that if you try to present something while something else is presented it prints warnings to the console letting you know that isn't right.

I just think you really have no choice but to wait until the sheet finishes animating away before you can present something new.

But maybe asking this question on a more general SwiftUI forum will get you a better answer.