Hello @ekazaev 👋 Currently, the layout only scrolls automatically when you have scrolled all the way down. Can you add a configuration for a tolerance range? So that even if you are for example 100pt from the bottom of the Scrollview and a new message comes in, it still scrolls automatically?

Hi can you fix this case, for example when message has one line text, and I edit this message to to two lined text, it doesn’t make space between edited message and last message

On the last release of the Chatlayout this issues was address but not really fixed. In-fact in the example all actions are added one after the other. The way we use the library involves several changes at the same time.

Step to reproduce: Have two different actions in the same operation like: remove a message and add a new one. To simulate that I have updated the sendMessage function in DefaultChatController in line 63 by adding the following code: if !messages.isEmpty { messages.removeLast() }

So now when you send a message it will delete the last message in the conversation at same time. The StagedChangeset is a collection that now have two operations which involve two performBatchUpdates

I'm opening this pull request to suggest a solution and open the discussion to that. https://github.com/ekazaev/ChatLayout/pull/21

Hey, first of all, good work with this library! 🙂 I switched from MessageKit.

I use ChatLayout with RxDataSources and somehow every now and then I'm getting an assertion failure when adding a new message.

I have not yet looked at the layout in detail and wondered if you might know what the problem could be?

Hi bro, I use Xcode 13.2 as a daily basis IDE. however, I met a compile error segmentation fault 11 for some files such as StateController line 675 columns 13. I've also realized that there is no Xcode backward compatibility. I've wondered so much as well.

Do you have any clue what's wrong with it?

First off, Hats off for this amazing layout, I have always struggled with chat layouts due to weird bugs and unknown issues that happen during the development, but this layout has made my life 100x easier.

What I'm trying to achieve is to always keep the CollectionView at bottom when a new message is inserted.

I tried this code snippet

                self.collectionView.reload(using: stagedChangeSet) { messages in
                    self.messages = messages
                    self.collectionView.scrollToItem(at: IndexPath(item: messages.count - 1, section: 0), at: .bottom, animated: true)
                }

But it looks like it's not working and throwing this error

[UICollectionView] Warning: Invalid IndexPath <NSIndexPath: 0x9ece669de5d637ba> {length = 2, path = 0 - 6} specified - will use a contentOffset of {0,0} as a fallback value. <UICollectionView: 0x7fb7fd072400; frame = (0 0; 375 529); clipsToBounds = YES; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x600001007720>; layer = <CALayer: 0x6000018633a0>; contentOffset: {0, 0}; contentSize: {374.99990000000003, 1412}; adjustedContentInset: {0, 0, 0, 0}; layout: <ChatLayout: 0x7fb7fcc25140>; dataSource: <ChatBotViewController: 0x7fb7faf35b20>>

Any idea what I'm doing wrong ?

On iOS15 Apple added a new Translate button in the uiMenuController. Step to reproduce: Select the text from the input bar and click to translate, then close the bottom sheet Result: The ChatViewController will scroll up and the input bar will be removed:

Hi, some issues popped up with your lib. Up until 1.1.10 my app behaved fine, but as soon as I've upgraded ChatLayout to 1.1.11, things got flaky. When entering a chat room, a huge chunk of empty space without any chat message cells is shown. When looking into layout inspector, no cells show up within the collectionView. When scrolling up, some chat message cells appear, but when scrolling back down they start to disappear again. I first thought it is some autolayout issue (which it could still be), but it worked pre 1.1.11, so I thought I want to ask you here if you know what the issue could be.

Thank you, and it's a really cool library you have here! Andreas

Hi,

Im trying to integrate your ChatLayout library into an iOS project. At first, let me thank you for awesome job you did here. Currently Im trying to structure the chat the way that: Every message in the chat is represented as a single section in the collection view and read indicator is always shown under the latest message as a footer of the last message (section).

1. Self-sizing/autolayout issue:

Im using self-sizing cells, but I'm not sure if Im setting the correct value for estimatedSize. The self-sizing in this library works for any non-zero values, so eg setting the estimatedSize like following

collectionLayout.settings.estimatedItemSize = CGSize(width: 1, height: 1)

will display the cells, but at the same time will result in broken autolayout constraints

"<NSLayoutConstraint:0x600001d0e990 'UIView-Encapsulated-Layout-Height' UIView:0x7fdcbc40d8e0.height == 1   (active)>"

I wanted to use some general purpose estimatedSize for self-sizing cells, similar to the flow layout one:

UICollectionViewFlowLayout.automaticSize

but later realised since this is a custom collection view layout, this value is not declared.

Setting the estimated size to a concrete value, e.g. CGSize(width: 100, height: 30) will result in a treatment, where the cell's frame won't properly adjust as the content of the cell changes. If you have any guidance here, Id really appreciate your help

2. Header/Footer are not part of the animation transaction In my app, I want to treat the read indicator as a standalone item == not added as a subview in the cell, to gain better abstraction and to not pollute the cell with the standalone item.

Im including a sample SwiftUI app that leverages the ChatLayout - aim of this app is to showcase the issue #1 & #2. ChatApp.zip

Any help highly appreciated! Thanks!

Expected behaviour: When a user sends a message and taps on the send button, the should be a scroll to the last item in the CollectionView.

Actual behaviour: When a user sends a message and taps on the send button, the CollectionView will scroll to show the just top of the last item.

It appears to be taking the estimated item size instead of the actual size of the new cell that has just been sent by the end user. The cell is added to the view and can be seen once you manually scroll to the bottom. Example: when we increased the estimated item height to 100, the scrolling was correct, but only for smaller messages. If it was a bigger message, it would be cut off after 100 height.

Something to note is that the above behaviour occurs when animation = true when scrolling i.e. self?.collectionView.setContentOffset(contentOffsetAtBottom, animated: true). When animation = false the CollectionView will scroll to the correct position.

Reproduction steps:

1. Open conversation
2. Have at least enough messages where you can scroll up and not see the latest message
3. Send a message while you are scrolled and can’t see the latest message
4. See how it scrolls only to the top of the latest message not to the cell itself.

Note: scrollToBottom() is not currently working in the Example app provided

Hi, team. I'm trying to integrate the xcframework of this project via Carthage but it fails on command line compilation.

Please help me with this issue.