arrays - 如何在UI中显示已解析的JSON数据？

我已经从API调用接收的JSON对象中解析了数据。到目前为止，我可以在调试器控制台中打印JSON数据，但是我试图将解析的JSON转换回可以在UI中显示的数据。我有两个模型，一个JSON对象的示例如下所示：

{
  "query": "milk",
  "sort": "relevance",
  "responseGroup": "base",
  "totalResults": 693,
  "start": 1,
  "numItems": 10,
  "items": [{
    "itemId": 10291863,
    "parentItemId": 10291863,
    "name": "Carnation Vitamin D Added Evaporated Milk, 12 oz",
    "msrp": 1.79,
    "salePrice": 1.48
  }]
}

我只想显示详细说明name和salePrice键的信息。但是，由于JSON是嵌套的，所以我不知道如何到达该层以检索值。这是我的数据模型代码：

struct Item: Codable {
  let query: String
  let sort: String
  let responseGroup: String
  let totalResults: Int
  let start: Int
  let numItems = 25
  let items: [Product]
}

struct Product: Codable {
  let name: String
  let salePrice: Double
}

代码到我的ViewController中：

class ViewController: UIViewController {
  @IBOutlet weak var itemField: UITextField!
  @IBAction func filterButton(_ sender: Any) {
    var components = URLComponents()
    components.scheme = "http"
    components.host = "api.walmartlabs.com"
    components.path = "/v1/search"
    let queryItemKey = URLQueryItem(name: "apiKey", value: secretKey)
    var queryItemQuery = URLQueryItem(name: "query", value: itemField.text)
    components.queryItems = [queryItemKey, queryItemQuery]
    let searchURL = components.url
    //Task to make API Network Call
    guard let url = components.url else { return }
    URLSession.shared.dataTask(with: url) { (data, response, error) in
      if error != nil {
        print(error!.localizedDescription)
      }
      guard let data = data else { return }
      //Implement JSON decoding and parsing
      do {
        //Decode retrived data with JSONDecoder and assing type of Item object
        let productData = try JSONDecoder().decode(Item.self, from: data)
            print(productData)
      } catch let jsonError {
        print(jsonError)
      }
    }.resume()
  }

  override func viewDidLoad() {
    super.viewDidLoad()
  }
}

运行代码时，打印日志显示以下内容（再次，我只想显示name和salePrice值。是否可以将这些值放置在数组中或以某种方式转换这些值？用我的用户界面填充？

最佳答案

创建一个数据源数组

var products = [Product]()

解析数据后，将products数组分配给数据源数组并重新加载表视图

...
let productData = try JSONDecoder().decode(Item.self, from: data)
self.products = productData.items
DispatchQueue.main.async {
   self.tableView.reloadData()
}

在numberOfRowsInSection中返回products.count

在cellForRow中获取当前产品并将值分配给标签

let product = products[indexPath.row]
cell.textLabel!.text = product.name
cell.detailTextLabel!.text = "\(product.salePrice)"

关于arrays - 如何在UI中显示已解析的JSON数据？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/49488739/