如何从模型类中获取属性并传递给swift 3中的集合视图

Question

这里我有一个集合视图，其中数据将从模型类传递到这里我需要从special_price获取CustomAttribute键值对，并且需要传递集合视图，其中只有一些产品将有特价和一些产品没有特价如何将数据传递到集合视图我无法实现它可以任何人帮我如何传递数据新到swift 3如果有任何错误的声明或写模型类请纠正我？

var listClassModel : ModelClass?
var items = [List]()

func listCategoryDownloadJsonWithURL(listUrl: String) {
        print(listUrl)
        let url = URL(string: listUrl)!
        let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
            if error != nil { print(error!); return }
            do {
                if let jsonObj = try JSONSerialization.jsonObject(with: data!) as? [String:AnyObject] {
                    let objArr = jsonObj["items"] as? [[String:Any]]
                    let objAdd = objArr!.map{List(dict: $0)}
                    self.items.append(contentsOf: objAdd)
                    self.listClassModel = ModelClass(dict: jsonObj as [String : AnyObject])
                    DispatchQueue.main.async {
                        guard let obj = self.listClassModel else { return }
                        let itemsCount = obj.items.count
                        print(itemsCount)
                        for i in 0..<itemsCount {
                            let customAttribute = obj.items[i].customAttribute
                            print(customAttribute.count)
                            for j in 0..<customAttribute.count {
                                if customAttribute[j].attributeCode == "image" {
                                    let baseUrl = "http://192.168.1.11/magento2/pub/media/catalog/product"
                                    self.listCategoryImageArray.append(baseUrl + customAttribute[j].value)
                                }
                                if customAttribute[j].attributeCode == "special_price" {
                                    self.specialPrice.append(customAttribute[j].value)
                                }
                            }
                        }

                        print(self.specialPrice)
                        self.activityIndicator.stopAnimating()
                        self.activityIndicator.hidesWhenStopped = true
                        self.collectionView.reloadData()
                        self.collectionView.delegate = self
                        self.collectionView.dataSource = self
                        self.collectionView.isHidden = false
                        self.tableView.reloadData()
                    }
                }
            } catch {
                print(error)
            }
        }
        task.resume()
    }

这是我的模型类

struct ModelClass {
    var items : [List]
    var totalCount : Int
    var searchCriteria : SearchCriteria

    init(dict:[String:AnyObject]) {
        totalCount = dict["total_count"] as! Int
        let searchDict = dict["search_criteria"] as? [String:AnyObject]
        searchCriteria = SearchCriteria(dict: searchDict!)
        let arr = dict["items"] as? [[String:AnyObject]]
        var listArr = [List]()
        for obj in arr! {
            listArr.append(List(dict: obj))
        }
        items = listArr
    }
}

struct List {

    let name : String
    let sku : Any
    let id : Int
    let attributeSetId : Int
    let price : Int
    let status : Int
    let visibility : Int
    let typeId: String
    let createdAt : Any
    let updatedAt : Any
    var customAttribute = [ListAttribute]()

    init(dict : [String:Any]) {
        if let customAttribute = dict["custom_attributes"] as? [[String: AnyObject]] {
            var result = [ListAttribute]()
            for obj in customAttribute {
                result.append(ListAttribute(json: obj)!)
            }
            self.customAttribute = result
        } else {
            self.customAttribute = [ListAttribute]()
        }
        self.name = (dict["name"] as? String)!
        self.sku = dict["sku"]!
        self.id = (dict["id"] as? Int)!
        self.attributeSetId = (dict["attribute_set_id"] as? Int)!
        self.price = (dict["price"] as? Int)!
        self.status = (dict["status"] as? Int)!
        self.visibility = (dict["visibility"] as? Int)!
        self.typeId = (dict["type_id"] as? String)!
        self.createdAt = dict["created_at"]!
        self.updatedAt = dict["updated_at"]!
    }
}
struct ListAttribute {

    let attributeCode : String
    let value : String

    init?(json : [String:AnyObject]) {

        self.attributeCode = (json["attribute_code"])! as! String
        self.value = (json["value"])! as! String

    }
}

这是我的形象，我的Json看起来如何