表格视图单元内的类似 Firebase 的系统

Question

我在我的 tableview 单元格中创建了类似的系统。但是它有问题。

1. 如果我喜欢一件事，每 7 个单元格也越来越喜欢，为什么？ reusableCell 有什么用吗？
2. 最好的方法是什么，我做错了吗？

这是like按钮系统：

cell.likeButton.addTarget(self, action: #selector(self.tapped), for: .touchUpInside)
    func tapped(sender: DOFavoriteButton) {
            if sender.isSelected {
                // deselect
                sender.deselect()//+1 like
            } else {
                // select with animation
                sender.select()//-1 like 
            }
        }

这是我的like系统函数：

func likeSystem(sender: DOFavoriteButton, cellForRowAt indexPath: IndexPath){
        if sender.isSelected {
        let cell = tableView.dequeueReusableCell(withIdentifier: "snusProductsCell", for: indexPath) as! SnusProductTableViewCell
        self.databaseRef.child("Snuses").child(self.products[indexPath.row].snusProductTitle).runTransactionBlock({
            (currentData:FIRMutableData!) -> FIRTransactionResult in
            if var post = currentData.value as? [String : AnyObject], let uid = FIRAuth.auth()?.currentUser?.uid {
                var stars : Dictionary<String, Bool>
                stars = post["hasLiked"] as? [String : Bool] ?? [:]
                var starCount = post["likes"] as? Int ?? 0
                if let _ = stars[uid] {
                    // Unstar the post and remove self from stars
                    starCount -= 1
                    stars.removeValue(forKey: uid)

                } else {
                    // Star the post and add self to stars
                    starCount += 1

                    stars[uid] = true
                    sender.deselect()
                }
                post["hasLiked"] = starCount as AnyObject?
                post["likes"] = stars as AnyObject?

                // Set value and report transaction success
                currentData.value = post

                return FIRTransactionResult.success(withValue: currentData)
            }
            return FIRTransactionResult.success(withValue: currentData)
        }) { (error, committed, snapshot) in
            if let error = error {
                print(error.localizedDescription)
            }
        }
        }else{
            sender.select()
        }
    }

我的大脑正在崩溃 ATM.. 不知道如何继续。请带我回到赛道。

这是我的结构：

Answer 1

这是我的功能，可以解决喜欢的问题：

class Cell: UITableViewCell {

    var liked = 0
    var likes: [String] = []
    var likeCounter = 0

    func readLikeStatus() {
        if liked == 0 {
            likeButton.setImage(UIImage(named: "unlike"), forState: .Normal)
            likeButton.setTitle("", forState: .Normal)
            likeLabel.text = "\(likeCounter) Likes"

        } else {
            likeButton.setImage(UIImage(named: "like"), forState: .Normal)
            likeButton.setTitle("", forState: .Normal)
            likeLabel.text = "\(likeCounter) Likes"
        }           
    }

    @IBAction func likeButton(sender: AnyObject) {

        if liked == 0 {

            likeTweet()
            liked = 1
            likeCounter = likeCounter + 1
            readLikeStatus()

        } else if liked == 1 {

            unlikeTweet()
            liked = 0
            likeCounter = likeCounter - 1
            readLikeStatus()

        }
    }

    func likeTweet() {
        let userID = [backendless.userService.currentUser.objectId: backendless.userService.currentUser.objectId]
        let usersRef = firebase.child("DeejayTweets").child(passedDJ.objectId).child(tweetID).child("likes")
        usersRef.updateChildValues(userID)
    }

    func unlikeTweet() {
        let userID = backendless.userService.currentUser.objectId
        let usersRef = firebase.child("DeejayTweets").child(passedDJ.objectId).child(tweetID).child("likes")
        usersRef.child(userID).removeValue()
    }

    func bindData(post: Tweet, indexPath: NSIndexPath, commentCount: NSMutableDictionary, avatare: NSMutableDictionary) {
        likeButton.setImage(UIImage(named: "unlike"), forState: .Normal)
        likeButton.setTitle("", forState: .Normal)
        liked = 0

        setLike(post, indexPath: indexPath, commentCount: commentCount, avatare: avatare)
     }

     func setLike(post: Tweet, indexPath: NSIndexPath, commentCount: NSMutableDictionary, avatare: NSMutableDictionary) {

        //SET IF TWEET IS LIKED
        if post.likes.contains(backendless.userService.currentUser.objectId) {
            likeButton.setImage(UIImage(named: "like"), forState: .Normal)
            likeButton.setTitle("", forState: .Normal)
            liked = 1
         }

         //SET LIKE COUNTER


         if post.likes.count == 1 {
            likeLabel.text = "0 Likes"
            likeCounter = 0
         } else if post.likes.count == 1 {
            likeLabel.text = "\(post.likes.count - 1) Like"
            likeCounter = 1
         } else {
            likeLabel.text = "\(post.likes.count - 1) Likes"
            likeCounter = 1
        }
     }

调用一切：

class ViewController: UIViewController.... {

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

            let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! Cell
            let post = tweets[indexPath.row]

            cell.bindData(post, indexPath: indexPath, commentCount: commentCount, avatare: avatare)

            return cell
    }

在我的火力基地中，我处理的一切都是这样的：

我并不是说这是世界上最好的做法，但它正在发挥作用，并且可能会让您了解如何处理这个问题。