Hi Brian, instead of notification center to automatically update my feed, is to use firebase observe child added. Is it a better way of automatically update my feed?

Hi Brian, I found if dragging the refresh control several times, the app will crash, and there is a fatal error: "Index out of range" showed. Can you please tell us how to fix the problem?

Hi Brian, Do you recommend to use ViewWillAper and call handleRefresh? That's can do refreshing automatically after you back to the home screen and follow / unFollow user. Thanks!

Hi Brian, can you show us how to integrate the game of chats app into the Instagram Firebase so we'll have messaging in the app?

I think the most off us wants to know how to deal with 10000 of posts you don't want to load that in your home feed as a value, but some kind of pagination or something like that

Hi, Brian. When do you plan on talking about cloud functions using firebase?

Hi Brian, Can you help with press on the profile image view in every cell at HomeController? DidSelectItemAt Dosent work Because I added tapGesture. Thanks!

Hi Brian, How do we know when to stop the refreshControl animation? Now it keeps spinning when I drag down the collectionView. The firebase process is a loop with async tasks so that its hard to know when the whole fetch data from database process is finished and call refreshControl.endRefreshing.

Hey Brian, Currently we are removing all posts and then filling the array again when refreshing the collectionview. Is this a good approach ??? What happens if we have to load 100 posts or more. Do we have to remove all posts and then add the new ones ? Secondly we have to put this line of code in the cellForItem at method if !self.refreshControl.isRefreshing {} Because the index was empty for a period, the app was occasionally throwing index out of range. It didn't happen every time. I solved it by asking if the refreshControl was finished with refreshing.

Hello Brian, if we don't have any internet connection and try to refresh the homefeed it keeps spinning. Do we have to use a timer that tries to execute the refresh method for e.g. 20 seconds and stops refreshing or is it possible to check wether the internet connection is available and then start refreshing ?

there is one bug in here... if you pull refresh while the app is not fully loaded yet or you pull again while it is refreshing the app crashes

very nice car:)

Hi Brian, I also notice the app crashes whenever you switch from user profile back to HomePage and refresh it quickly. It seems that loading data asynchronously from Firebase causes the post array in different view controllers to confuse and hence run out of index range. Do you have any good fix for that?

Hey Brian, if you refresh the HomePage without uploading any post the app crash (index Out of range problem)

Hi, Brian When I call function from one class to another class, I though using delegation with protocol is good way of doing it. But you were using NotificationCenter to broadcast custom message through app. Is that better for some reasons I guess? Is NotificationCenter going to handle pop-up messages when new posts are added? (like notification messages for apps). Thanks,

Hey Brian, Finally found a fix for the bug notified by Amor ?

love GTI's. Manual is great too, if not manual, hopefully u got that dual clutch transmission!

Hey brian, I found a serious bug...Refresh control works fine...But, if i refresh continuously for 3-4 times, my app crashes with error message "Index out of range".

Hey Brian. I found that when I added post (via "Share" button) the list of posts is updated correctly and I can see the list updated. However, the update does not work for grid and list views in "UserProfileController". Do you have any trick or recommendation? Thanks Pavol

Hey Brian, Really enjoying this course! I seem to have a bug that I haven't seen discussed in any of the previous video forums, I have already compared my code with yours multiple times (via download project) and nothing stands out. I wonder if you could give an indication of what may be the problem. So when I navigate between from the User Profile tab to the Home Tab, upon scrolling down my the collection view in the home tab the collection view spontaneously changes it's layout, such to replicate the UserProfile Controller. It does not do this elegantly. It looks chaotic. Weirdly this does not happen when I navigate from another user's page i.e. through the search tab. Could you please pin point why this could be happening and how I could stop this? Thank you!

Hey Brian, I had a quick question do you refactor your code at some point to implement design patterns such as a facade class to hide away the low level code of fetching information for example? I was just curious because I just took a software architecture class and I am trying to bring everything together hoping to understand how to write good code.

Hi brian I have a question , also every time I scroll or execute function handleRefresh my images and images from followed users are being duplicated every time (my profile has 4 pictures and after refreshing 8), what could the fix be ?

There's a bug where if you drag to far down to refresh the app crashes with an indexPath out of bounds error in the HomeController cellForItem method. Please help!

Hello Brian, In the userProfile page in the application, the constraints we provided using the anchor method makes a perfect image for iPhone 7, but when I switched to iPhone X or XR, I get weird images.

Hi brian I have a question, why didn't you use observe.childAdded in HomeController so that when we add a new Image it will refresh automaticly ?

Hello Brian, I followed everything in this video but every time when I scroll to refresh there always post duplications occur, can you tell if there is any way to fix this bug? thanks

Hi there, I am facing an issue when I have followed the user, so I want to search for it and then unfollow it, I make the move, then when I just jump from clicking the unfollow straight to the homeFeed and refresh it crashes.

Hi Brian. Is it alright if I don't remove observer of NotificationCenter? I always put notification observer inside of `viewWillAppear` and remove observer inside of `viewDidDisappear` as far as I know.. Am I right in this logic?

Anyone else having the duplication issue of posts?I forgot to to fix that...old comment section so I do not expect a reply anytime soon..

Hello Brian, I hope all is good and well! When I downloaded the source code of the project I saw that in the SignUpController you had a piece of code that you have never used so far. // Helper function inserted by Swift 4.2 migrator. fileprivate func convertFromUIImagePickerControllerInfoKeyDictionary(_ input: [UIImagePickerController.InfoKey: Any]) -> [String: Any] { return Dictionary(uniqueKeysWithValues: input.map {key, value in (key.rawValue, value)}) } I am not really sure what this code is about. Can you please explain it to me. Thank you

Hello Brian and colleagues, is anyone also having a problem of refresh where the app crashes when you follow someone and refreshes your Home Feed by pulling it down? it says "ERROR: INDEX OUT OF RANGE". Please Brian how do i fix this?

Hey Brian, Awesome tutorial is there a way I could do this for search controller to refresh new users that signed up?