ios - JSON 仅显示所有单元格中的最后一个可选 Swift 4

Question

所以下面发布的代码是我的作品

 struct AnimeJsonStuff: Decodable {
    let data: [AnimeDataArray]
}

struct AnimeLinks: Codable {
    var selfStr   : String?

    private enum CodingKeys : String, CodingKey {
        case selfStr     = "self"
    }
}
struct AnimeAttributes: Codable {
    var createdAt   : String?
    var slug : String?
    private enum CodingKeys : String, CodingKey {
        case createdAt     = "createdAt"
        case slug = "slug"
    }
}
struct AnimeRelationships: Codable {
    var links   : AnimeRelationshipsLinks?

    private enum CodingKeys : String, CodingKey {
        case links     = "links"
    }
}

struct AnimeRelationshipsLinks: Codable {
    var selfStr   : String?
    var related   : String?

    private enum CodingKeys : String, CodingKey {
        case selfStr     = "self"
        case related     = "related"
    }
}

struct AnimeDataArray: Codable {
    let id: String?
    let type: String?
    let links: AnimeLinks?
    let attributes: AnimeAttributes?
    let relationships: [String: AnimeRelationships]?

    private enum CodingKeys: String, CodingKey {
        case id = "id"
        case type = "type"
        case links = "links"
        case attributes = "attributes"
        case relationships = "relationships"
    }
}

这段代码是我解析数据的函数:

    func jsonDecoding() {

    let jsonUrlString = "https://kitsu.io/api/edge/anime"

    guard let url = URL(string: jsonUrlString) else {return}
    URLSession.shared.dataTask(with: url) { (data, response, err) in
        guard let data = data else {return}
        do {
            let animeJsonStuff =  try JSONDecoder().decode(AnimeJsonStuff.self, from: data)
            for anime in animeJsonStuff.data {
                //   print(anime.id)
                //    print(anime.type)
                //   print(anime.links?.selfStr)
                let animeName = anime.attributes?.slug
                print(animeName)
                DispatchQueue.main.async {
                    self.nameLabel.text = animeName
                }

                for (key, value) in anime.relationships! {
                    //   print(key)
                    //   print(value.links?.selfStr)
                    //    print(value.links?.related)
                }
            }
        } catch let jsonErr {
            print("Error serializing json", jsonErr)
        }
        }.resume()
}

这是控制台打印出来的内容:

Optional("cowboy-bebop")
Optional("cowboy-bebop-tengoku-no-tobira")
Optional("trigun")
Optional("witch-hunter-robin")
Optional("beet-the-vandel-buster")
Optional("eyeshield-21")
Optional("honey-and-clover")
Optional("hungry-heart-wild-striker")
Optional("initial-d-fourth-stage")
Optional("monster")
Optional("cowboy-bebop")
Optional("cowboy-bebop-tengoku-no-tobira")
Optional("trigun")
Optional("witch-hunter-robin")
Optional("beet-the-vandel-buster")
Optional("eyeshield-21")
Optional("honey-and-clover")
Optional("hungry-heart-wild-striker")
Optional("initial-d-fourth-stage")
Optional("monster")
Optional("cowboy-bebop")
Optional("cowboy-bebop-tengoku-no-tobira")
Optional("trigun")
Optional("witch-hunter-robin")
Optional("beet-the-vandel-buster")
Optional("eyeshield-21")
Optional("honey-and-clover")
Optional("hungry-heart-wild-striker")
Optional("initial-d-fourth-stage")
Optional("monster")

它现在显示文本，但当我有三个单元格时，它只显示最后一个名为“monster”的 optional ，而不显示所有其他选项。它只在每个单元格中显示怪物。应该是

第一个单元:牛仔贝波普第二格:牛仔-波普-天国-诺-托比拉第三格:三枪等等

表格 View 方法:

     let nameLabel: UILabel = {
        let label = UILabel()
        label.textColor = UIColor.black

        return label
    }()
    let profileImageView: UIImageView = {
        let imageView = UIImageView()
        imageView.contentMode = .scaleAspectFit
        return imageView
    }()

    let synopsis: UILabel = {
        let label = UILabel()
        label.textColor = UIColor.black

        return label
    }()


    override init(frame: CGRect) {
        super.init(frame: frame)
        setupViews()
        jsonDecoding()
        self.layer.shadowOpacity = 0.05
        self.layer.shadowRadius = 0.05
        self.layer.cornerRadius = 1



    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    func setupViews() {
        backgroundColor = UIColor(red:0.86, green:0.87, blue:0.89, alpha:1.0)
         addSubview(nameLabel.self)
          addSubview(synopsis.self)
        addConstraintsWithFormat("H:|-18-[v0]|", views: synopsis)
        addConstraintsWithFormat("V:|-8-[v0]|", views: synopsis)
        addConstraintsWithFormat("H:|-12-[v0]|", views: nameLabel)
    }
}

extension UIColor {

    static func rgb(_ red: CGFloat, green: CGFloat, blue: CGFloat) -> UIColor {
        return UIColor(red: red/255, green: green/255, blue: blue/255, alpha: 1)
    }

}

extension UIView {

    func addConstraintsWithFormat(_ format: String, views: UIView...) {
        var viewsDictionary = [String: UIView]()
        for (index, view) in views.enumerated() {
            let key = "v\(index)"
            viewsDictionary[key] = view
            view.translatesAutoresizingMaskIntoConstraints = false
        }

        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: format, options: NSLayoutFormatOptions(), metrics: nil, views: viewsDictionary))
    }

}

细胞功能:

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        navigationItem.title = "Kitsu - Your anime feed"

        collectionView?.backgroundColor = UIColor(red:0.09, green:0.13, blue:0.19, alpha:1.0)
        collectionView?.register(viewControllerCells.self, forCellWithReuseIdentifier: cellId)
    }


        override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 3
    }

    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        return collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: 350, height: 150)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
        return  UIEdgeInsets(top: 15, left: 0, bottom: 10, right: 0)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

Answer 1

如果您的 jsonDecoding() 函数放置在每个单元格中，它将获取所有项目，然后在内部的 for 循环中，它将循环遍历每个获取的项目，从第一个到最后一个更改标签。一旦到达最后，标签将不再改变。