What is the function of this code? about chatlayout

[std-s]

For now, that's the only way to deal with it.

thx again.

[ekazaev]

Hi @std-s If there is some interface action happens when you can not update the collection view (for example you are updating the content offset animatingly and the state of collection view is undefined in that moment) if at this very moment an update comes, it stores it, and the reaction will be called when the currentInterfaceActions are empty. SetActor there behaves like a simple state machine.

[std-s]

guard currentInterfaceActions.options.isEmpty else {
            print("A:\(Date())")
            let reaction = SetActor<Set<InterfaceActions>, ReactionTypes>.Reaction(type: .delayedUpdate,
                                                                                   action: .onEmpty,
                                                                                   executionType: .once,
                                                                                   actionBlock: { [weak self] in
                guard let self else {
                    return
                }
                print("B:\(Date())")
                processUpdates(with: sections, animated: animated, requiresIsolatedProcess: requiresIsolatedProcess, completion: completion)
                print("C:\(Date())")
            })
            currentInterfaceActions.add(reaction: reaction)
            return
        }

hi, @ekazaev
I printed the current time of three locations A, B, C; found that A and B took a lot of time before, why is that?
As a result, after the page jumps, there is a blank page time.

RPReplay_Final1691117094.mov

[ekazaev]

@std-s Detailed answer you can probably find here. #51 It s a bit vague as at the begining I couldnt understadn the question. But the problem is that you need to populate cells syncroniously before the push animation starts. That is the issue there. And the function you are referencing to is asynchorios.

The difference in time there is because B will be called only when the currentInterfaceActions are empty again and after the previous animating insertion is completed. It is not the issue there.

[ekazaev]

@std-s Anything else I can help you with or it is safe to close the issue?

[std-s]

@std-s Detailed answer you can probably find here. #51 It s a bit vague as at the begining I couldnt understadn the question. But the problem is that you need to populate cells syncroniously before the push animation starts. That is the issue there. And the function you are referencing to is asynchorios.

The difference in time there is because B will be called only when the currentInterfaceActions are empty again and after the previous animating insertion is completed. It is not the issue there.

@ekazaev hi, the related method of issue #51 is not applicable. The effect is still as shown in the video above.

[std-s]

How to reduce the time spent from A to B is what I want.

[ekazaev]

@std-s You need to add a flag there and avoid async processing on appearance. Keep in mind it will require change in the Chat Controller as well. You want to get messages and update the collection view before the pushing animation starts.

This is what you want to get
gif

1. So chatController.loadInitialMessages { - is asynchronious function. You need a synchronous for the initial appearance. Synchronous means let sections = chatController.getCachedMessages()
2. then add a flag to processUpdates that on initial appearance it would ignore the currentInterfaceActions.options count like guard ignoreInterfaceActions || currentInterfaceActions.options.isEmpty else { and process those changes anyway. Keep this flag off for all the other times.
3. Keep in mind that you must precess those sections synchronously from the first call of viewDidLayoutSubviews. It is the first time when your UINavigationController sets the correct size of the ChatViewController inside of it. Otherwise the view size is not correct.

[ekazaev]

@std-s Anything else I can help you with?

[std-s]

@std-s You need to add a flag there and avoid async processing on appearance. Keep in mind it will require change in the Chat Controller as well. You want to get messages and update the collection view before the pushing animation starts.

This is what you want to get gif

1. So chatController.loadInitialMessages { - is asynchronious function. You need a synchronous for the initial appearance. Synchronous means let sections = chatController.getCachedMessages()
2. then add a flag to processUpdates that on initial appearance it would ignore the currentInterfaceActions.options count like guard ignoreInterfaceActions || currentInterfaceActions.options.isEmpty else { and process those changes anyway. Keep this flag off for all the other times.
3. Keep in mind that you must precess those sections synchronously from the first call of viewDidLayoutSubviews. It is the first time when your UINavigationController sets the correct size of the ChatViewController inside of it. Otherwise the view size is not correct.

👌，Ok, I'll try these methods.

[ekazaev]

@std-s My pleasure. good luck