Publisher animation is not working about swift-composable-architecture HOT 3 CLOSED

I am experiencing the same issue

from swift-composable-architecture.

Hi @heoblitz, this is happening because effect actions that emit actions immediately (such as is the case with Effect.send) are handled differently than asynchronous effect actions. The synchronous action is processed immediately in the same call stack as when the original action was sent, and so I don't believe there is a way to process that action with an animation.

Note that this doesn't have anything to do with Effect.publisher vs Effect.run. It entirely has to do with synchronous actions from effects. If you update your action like so:

return .publisher {
  Just(.changeShowingDetailView)
    .delay(for: 0, scheduler: DispatchQueue.main)
}
.animation(.default)

…it will also work.

I'm not really sure there is anything the library can do to change this behavior. Our choice to process synchronous actions in the same call stack as when the original action was sent is due to people relying and expecting that kind of behavior. Breaking that expectation will lead to a lot of problems.

I'm inclined to convert this to a discussion since I don't think the library can really do anything to remedy this, and there are simple workarounds. How does that sound?

from swift-composable-architecture.

@mbrandonw Thanks for the clarification.

It's a minor comment, but it would be nice to have the publisher animation usage in the documentation or comments.

As you say, it would be great to close the issue and turn it into a discussion!

from swift-composable-architecture.