Swift：如何从UIButton CollectionView单元格调用JSON ID

Question

我在UICollectionViewCell中有一个UIButton。 想要从此单元格获取json id。 我完美地解析UICollectionViewController中的json数据。 单击UICollectionViewCell中的UIButton时，我一直都在结尾ID处出现的问题。

这是我的代码

杰森

{
  "error": false,
  "product_sellers": [
    {
      "id": 5,
      "store_name": "ahmedstore",
      "photo": "user_12-06-2017-12-32-56.png",
      "is_favorite": 0
    },
    {
      "id": 122,
      "store_name": "aitldev6",
      "photo": null,
      "is_favorite": 0
    },
    {
      "id": 123,
      "store_name": "aitlmanager",
      "photo": "user_2017-08-31-10-06-am (16).jpg",
      "is_favorite": 0
    },
    {
      "id": 135,
      "store_name": "ajanta library",
      "photo": "user_2017-08-19-7-16-am23931.png",
      "is_favorite": 0
    },

CollectionViewController

类ProductStoreCollectionViewController：UICollectionViewController，UICollectionViewDelegateFlowLayout {

override func viewDidLoad() {

    super.viewDidLoad()


    let url = URL(string: "..........")


    URLSession.shared.dataTask(with:url!) { (urlContent, response, error) in

        if error != nil {
            print(error ?? 0)
        }
        else {
            do {

                let items = json["product_sellers"] as? [[String: Any]] ?? []

                self.arrStore = [Store]()

                for item in items {


                    let oStore = Store()

                    oStore.id = item["id"] as? Int
                    oStore.image = item["photo"] as? String
                    oStore.store_name = item["store_name"] as? String
                    oStore.is_favorite = item["is_favorite"] as? Int

                    ProductStoreId.store_id = oStore.id!

                    self.arrStore.append(oStore)

                }

            } catch let error as NSError {
                print(error)
            }

            DispatchQueue.main.async(execute: {

                self.collectionView?.reloadData()
            })

        }



    })

}

UICollectionViewCell

class StoreCollectionViewCell: BaseCell{



    let heartBtn: UIButton = {

        let btn = UIButton()
        btn.setImage(UIImage(named: "heart_white_copy"), for: .normal)

        btn.translatesAutoresizingMaskIntoConstraints = false
        return btn
    }()

    var sellerId2: Int = 1


    func heartBtnClick(){

        print("box Btn click")


        self.sellerId2 = ProductStoreId.store_id


        print("add to favoriteStore\(self.sellerId2)")


    }


    override func setupCell() {

        heartBtn.addTarget(self, action: #selector(heartBtnClick), for: .touchUpInside)
        addSubview(heartBtn)




    }

}

Answer 1

这是因为您的ProductStoreId.store_id在解析时已存储了最后一个ID。

您需要在数据源方法中分配ID

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    // Your code
    let store = self.arrStore[indexPath.row] // Please correct it if not
    cell.sellerId2 = store.id
}

然后在您的StoreCollectionViewCell类中

func heartBtnClick(){
    print("box Btn click")
    //We don't need the below line
    //self.sellerId2 = ProductStoreId.store_id
    print("add to favoriteStore\(self.sellerId2)")
}