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Hello Brian, isn't it better due to performance reason instead of saving a 0 into the database for disliking to delete the node =

Hey Brian, Can you show us how to count the amount of likes and comments and to display them. If a user dislikes or deletes his comment it should change the value in realtime and every user shall see it. Also the labels in the UserProfileController with follower, following and posts are empty .

Hey Brian, you can like the posts and comment posts also if you click outside of icons. How can we fix that bug. ?

Hey, Brian, I tried to implement the "heart popping up" behaviour when you double click the PhotoImageView. I did it using delegation but I have a intermittent problem. When I double click que PhotoImageView the heart animation functions sometimes only... :(

You have a nice car how much ps has your gti ? :) Do you think to buy an Tesla model 3 :) ? best regards from Germany

Hey Brian, what do you mean by :" things can become a bit hairy if you include a cache, so we'll just leave the implementation simple by fetching the like status each time we need it." Why do we have to include a cache and what isn't so good on the current solution ? Is it because we always making Firebase calls to retrieve the information whether a post its liked etc.. Can you please show us the way with the cache.

hey brian are you going to add the notification controller to get notify when an user likes or comment.. etc ?

I have a question about the way to get post for a particular cell. guard let indexPath = self.collectionView?.indexPath(for: cell) else { return } var post = posts[indexPath.item] may I ask the reason why not just do cell.post?

Would storing "Likes" on Firebase DB as a property of a Post, rather than its own node, be more efficient than storing a list? I'm very new to this topic of storing data and it seemed like it would make sense to store Likes within the Post object. It could be a list of users who liked the current photo? Which one will be more scalable in the long term?

Hi from london UK Brian, man you're a legend thanks a lot for you video tutorails they help a lot and I learned a lot, thank you... One thing if you could please help me with is that I added a UILabel (likes counter ) to the homeCountroller but I'm having problem retrieving the value to show the number of likes of you could just show me how can I add that function I'll appreciate it Thanks in advance also I'll like to include videos to home controller how can we achieve this??? Thanks and hope you're having a greate weekend... Kind regards Jesus Miguel

Hey, I'm having a hard time finding where you set up the Edit Profile page?

hello guys, i try to build a similar one but add the like counting number next to like heart image. it works, i tap heart go red, and number go +1, and i tap again heart go white and number -1, but i just realize an error, if i scroll tableview down and up say 5 times, once i tap the like button, it is called 5 times !!!!!! i try to solve it and search the google for 6 days now. no one seems have the similar problem, do you guys think this is the problem come from dequed cell not being removed ? please give some advice or any link may help , thanks

Hi Brian, So after getting this to work, I wanted to pull the user's likes and show it in a view. The way I went with was to save another child into the database as "userLikes" where I am saving UIDs of users and then posts IDs below it. Having done that it seems like I would also need to save the posts data separately in order to retrieve the full data of posts. I feel that this is just duplicating information into the database which already exist. How would you go about that?

Would it not make sense to store FirAuth.auth()?.currentUser?.uid in a global variable, instead of querying the db every time?

Hi Brian, I have a question on where to store like in firebase. Since we have the possibility that multiple users might like the same photo, shouldn't we use firebase transaction?

hello Brain, so for the like why do you add a number to it so users can see the number of likes a post has.

There's a problem here .. if someone has liked a photo and some other user likes that same photo .. the previous like get overwritten by the new user.

Hi Brian, I am unsure if this is just my computer but at 6:08 the video gets a playback error. I have refreshed multiple times and have gone on to complete the next video in the series with no similar problems. Just thought it should be brought to your attention. Thanks again for all that you do! Thanks, Tim

YOU'RE A LEGEND BRIANVOONG

at 18:58, can you explain little more detail about when the post is outside an array, we will get different reference of that object ? but they are in the same function, why need to assign again? thanks

Hi Brian, when i like or dislike a post. Instead of refreshing the same cell my code is creating a new cell right under the initial one. I compared it to your code but figure out the problem. I am stuck on it from quite a bit. Can you please help? Thanks

When I try to like my own post and reload by pulling down, the like icon is in unselected state but Firebase Database works fine. Even running the app again though your own post has a value of 1, icon still unselected. How is that?

Hey Brian and fellow readers: im trying to extend this function to have a double tap functionality like instagram's but i can't seem to make it work inside the post picture, i can on the homecell tough, the code is as follow's , any pointer in the correct direction will be much appreciated. lazy var photoImgView: CustomImageView = { let iv = CustomImageView() iv.backgroundColor = UIColor(hex: AppColors.mainFontReverse.rawValue) iv.contentMode = .scaleAspectFill iv.clipsToBounds = true iv.isUserInteractionEnabled = true let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap)) doubleTapGesture.numberOfTapsRequired = 2 iv.addGestureRecognizer(doubleTapGesture) return iv }() @objc fileprivate func handleDoubleTap(gesture: UITapGestureRecognizer){ if gesture.state == .ended { handleLike() } }

how to create like / dislike for android studio please help me, or send me a source code of a project that has already done please

Hey brian, Love the courses i just have a problem with the likes, i keep getting index out of range and i don't know why, could you please help me, here is my code. override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return posts.count } override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! EloheSplashCell cell.post = posts[indexPath.item] cell.delegate = self return cell } func didTapComment(post: Post) { print("Message coming from HomeController") print(post.caption) let commentsController = CommentsController(collectionViewLayout: UICollectionViewFlowLayout()) commentsController.post = post navigationController?.pushViewController(commentsController, animated: true) } func didLike(for cell: EloheSplashCell) { guard let indexPath = collectionView?.indexPath(for: cell) else { return } var post = self.posts[indexPath.item] print(post.caption) guard let postId = post.id else { return } guard let uid = Auth.auth().currentUser?.uid else { return } let values = [uid: post.hasLike == true ? 0 : 1] Database.database().reference().child("likes").child(postId).updateChildValues(values) { (err, _) in if let err = err { print("Failed to like post:", err) return } print("Successfully liked post.") post.hasLike = !post.hasLike self.posts[indexPath.item] = post self.collectionView?.reloadItems(at: [indexPath]) } } } Thank you and how a bless day

Hey Brian, I am a little confuse about the Firebase transaction. I looked on Google, stackoverflow etc. And for the firebase website they gave this example for the likes counter. The only thing i am confuse with is how will i be able to access the database to store the likes count or maybe im doing it wrong? Thank you brian and you have a bless day. function toggleStar(postRef, uid) { postRef.transaction(function(post) { if (post) { if (post.stars && post.stars[uid]) { post.starCount--; post.stars[uid] = null; } else { post.starCount++; if (!post.stars) { post.stars = {}; } post.stars[uid] = true; } } return post; }); }

Hey Brian, I love your videos and seriously don't mean to bother you today. I am currently working with displaying the likes count with Transaction and it is going very well. I was able to get a snapshot of the if the user like the post or not the only thing is because we are returning likes of the logged in user. I can't retrieve anyone else likes. Here the code: likesRef.runTransactionBlock({ (likes) -> TransactionResult in if let likesNum = likes.value as? Int, likesNum == 1{ print("Returning likes") print("Likes: " + String(likesNum)) return TransactionResult.success(withValue: likes) }else{ return TransactionResult.success(withValue: likes) } }, andCompletionBlock: {(error,completion,snap) in if !completion { print("The value wasn't able to Update") }else{ //Updated } }) It returns the post he likes and even gives it a count of one but the thing is i just can't access the others who like the post. Any tips? Thank you and have a bless day.

Hey Brian and Everyone, I used this code to figure out how many likes a post have however i can't get it to display for the cell however, i was able to display it in the database. If there are any "bad code syntax" that i am using, please let me know. let likesRef = Database.database().reference().child("likes").child(postId) likesRef.updateChildValues(values) { (err, _) in if let err = err { print("Failed to like post:", err) return } print("Successfully liked post") post.hasLike = !post.hasLike likesRef.child("likes").runTransactionBlock({ (currentData:MutableData!) in var value = currentData.value as? Int if (value == nil) { value = 0 } if(!post.hasLike){ currentData.value = value! - 1 return TransactionResult.success(withValue: currentData) }else{ currentData.value = value! + 1 } return TransactionResult.success(withValue: currentData) }) You should see the count in the database, also brian or anyone if you could please help me find out a way to display the count. Thank you have a bless day.

Hey, Can you show how to reflect the change of the like button inside the post cell when you go between tabs\user's profile that posted? Also can you show how to do it with likes count? thanks.

Hey Brian, May I know what is the purpose of having a 'for' in front of the 'cell' in didLike function's definition? As I have tried using just 'cell' alone in the definition, it is working out fine so I was wondering if the for is used for some purposes like preventing the app from crashing? Thanks.

Men, I have a great headache with this. I have more than 4 days 16h a day to show up the bookmark. I am able to save it on firebase even show it on the UI as a bookmark (dark color). well the thing is that I want to show it to the bookmark on UserProfileController and I am calling a method fetchBookMark! I am saving the bookmark the same as like node. Meaning that it has .child("bookmark").child(postId).child("userId). what ever, the thing is even though I copy and paste the same value from firebase debugging it it doesn't want to retrieve the .value from the observeSingleEvent. It just doesn't show up, so I cannot show up the bookmark on the UserProfileController. Is that the Cache that you mention on the description of this video? if so, do you have any video or resource that I can use to get things done? thank youu! 不错不错。

How can I use a label to display the number of likes that post have? Anyway I can grab the Int from the database?

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There is a bug that I cannot solve. If I press multiple times quickly, it could add multiple like or remove multiple likes from firebase. Has anyone solved that problem?