如何在UICollectionView单元格被点击后，根据用户评级显示对应表情图标？

我有一个UICollectionView，它从API加载图片供用户评级，功能运行正常。现在需要实现：根据用户的评级类型（好评、差评等），在用户选中的单元格上显示对应的表情图标。点击单元格会弹出模态窗口让用户完成评级，我已经实现了从模态窗口向主集合视图传递数据，现在需要利用这些数据在对应单元格显示表情，方便用户查看自己的选择。

// 模态窗口的协议代理
protocol ModalDelegate {
    func changeValue(userChoice: String, rateMovieID: String, rateImageUrl: String)
}

// 遵循ModalDelegate的主视图控制器类
class GuestRateMovieView: UIViewController, ModalDelegate {
    func changeValue(userChoice: String, rateMovieID: String, rateImageUrl: String) {
        self.userChoice = userChoice
        print("choice =>", userChoice, "id =>", rateMovieID, "url =>", rateImageUrl)
    }
}

// 自定义CollectionViewCell
class MoviesCollectionCell: UICollectionViewCell {
    private var movieImages = NSCache<NSString, NSData>()
    weak var textLabel: UILabel!
    let movieImage: UIImageView = {
        let image = UIImageView()
        image.translatesAutoresizingMaskIntoConstraints = false
        image.clipsToBounds = true
        image.contentMode = .scaleAspectFill
        image.layer.cornerRadius = 10
        return image
    }()
    
    let btnRate: UIImageView = {
        let image = UIImageView()
        image.translatesAutoresizingMaskIntoConstraints = false
        
        image.clipsToBounds = true
        image.contentMode = .scaleAspectFit
        image.alpha = 0
        return image
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        contentView.addSubview(movieImage)
        movieImage.addSubview(btnRate)
    }
    
    override func prepareForReuse() {
        super.prepareForReuse()
        movieImage.image = nil
    }
    
    func configure(with urlString: String){
        // 检查缓存图片
        if let imageData = movieImages.object(forKey: urlString as NSString){
//            print("using cache image")
            DispatchQueue.main.async {
                let image = UIImage(data: imageData as Data)
                self.movieImage.image = image
            }
        }else{
            guard let url = URL(string: urlString) else{
                return
            }
            // 下载图片
            URLSession.shared.dataTask(with: url) {[weak self] data, _, error in
                guard let data = data, error == nil else {
                    return
                }
                DispatchQueue.main.async{
                    self?.movieImages.setObject(data as NSData, forKey: url.absoluteString as NSString)
                    let image = UIImage(data: data)
                    self?.movieImage.image = image
                }
            }.resume()
        }
        
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        NSLayoutConstraint.activate([
            movieImage.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 10),
            movieImage.topAnchor.constraint(equalTo: contentView.topAnchor),
            movieImage.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -10),
            movieImage.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
            
            btnRate.centerXAnchor.constraint(equalTo: movieImage.centerXAnchor),
            btnRate.centerYAnchor.constraint(equalTo: movieImage.centerYAnchor),
            btnRate.widthAnchor.constraint(equalToConstant: 30),
            btnRate.heightAnchor.constraint(equalToConstant: 30)
        ])
    }
    
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reUseMoviesCellID, for: indexPath) as! MoviesCollectionCell
        var movieTitle = [String]()
        for obj in moviesArray {
            if let movieObj = obj as? NSDictionary {
                   let packShotObj = movieObj.value(forKey: "packShot") as! NSDictionary?
                   let id = movieObj.value(forKey: "id") as! String?
                   let title = movieObj.value(forKey: "title") as! String?
                   if let packShots = packShotObj{
                        let thumbs = packShots.value(forKey: "thumbnail") as! String?
                        if let thumbnails = thumbs{
                            movieThumbnails.append(thumbnails)
                            movieTitle.append(title ?? "")
                        }
                    }
            }
        }
        let imageUrl = movieThumbnails[indexPath.row]
        cell.movieImage.image = nil
        cell.configure(with: imageUrl)
        if userChoice == "Hate it" {
            cell.btnRate.image = UIImage(named: "HateIt")
            moviesCollectionView.reloadData()
        }
        
        return cell
    }

效果说明 #

• 最终效果：用户完成评级后，对应单元格上显示匹配该评级的表情图标
• 目标效果：支持多个单元格分别进行评级，每个单元格独立显示对应选择的表情图标

内容的提问来源于stack exchange，提问作者chevi99