Ios Swift 4-将类结构的JSON响应嵌套到TableViewCell中

我有以下结构来帮助从JSON web api返回数据：

// To parse the JSON, add this file to your project and do:
//
//   let story = try? JSONDecoder().decode(Story.self, from: jsonData)

import Foundation

typealias Story = [StoryElement]

struct StoryElement: Codable {
    let id: Int
    let url: String
    let storyPublic, featured: Bool
    let added, modified: String
    let itemType: ItemType
    let collection: JSONNull?
    let owner: Owner
    let files: Files
    let tags: [ItemType]
    let elementTexts: [ElementText]
    let extendedResources: ExtendedResources

    enum CodingKeys: String, CodingKey {
        case id, url
        case storyPublic = "public"
        case featured, added, modified
        case itemType = "item_type"
        case collection, owner, files, tags
        case elementTexts = "element_texts"
        case extendedResources = "extended_resources"
    }
}

struct ElementText: Codable {
    let html: Bool
    let text: String
    let elementSet: ElementSet
    let element: Element

    enum CodingKeys: String, CodingKey {
        case html, text
        case elementSet = "element_set"
        case element
    }
}

struct Element: Codable {
    let id: Int
    let url, name: String
    let resource: ElementResource
}

enum ElementResource: String, Codable {
    case elements = "elements"
}

struct ElementSet: Codable {
    let id: Int
    let url: URL
    let name: Name
    let resource: ElementSetResource
}

enum Name: String, Codable {
    case dublinCore = "Dublin Core"
    case itemTypeMetadata = "Item Type Metadata"
}

enum ElementSetResource: String, Codable {
    case elementSets = "element_sets"
}

enum URL: String, Codable {
    case httpWWWRalstoncemeteryCOMGreeleyAPIElementSets1 = "http://www.ralstoncemetery.com/greeley/api/element_sets/1"
    case httpWWWRalstoncemeteryCOMGreeleyAPIElementSets3 = "http://www.ralstoncemetery.com/greeley/api/element_sets/3"
}

struct ExtendedResources: Codable {
    let exhibitPages: Files
    let geolocations: Owner

    enum CodingKeys: String, CodingKey {
        case exhibitPages = "exhibit_pages"
        case geolocations
    }
}

struct Files: Codable {
    let count: Int
    let url, resource: String
}

struct Owner: Codable {
    let id: Int
    let url, resource: String
}

struct ItemType: Codable {
    let id: Int
    let url, name, resource: String
}

// MARK: Encode/decode helpers

class JSONNull: Codable {
    public init() {}

    public required init(from decoder: Decoder) throws {
        let container = try decoder.singleValueContainer()
        if !container.decodeNil() {
            throw DecodingError.typeMismatch(JSONNull.self, DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Wrong type for JSONNull"))
        }
    }

    public func encode(to encoder: Encoder) throws {
        var container = encoder.singleValueContainer()
        try container.encodeNil()
    }
}

您可以看到我正在使用的JSON输出，以及这里的原始结构：（仅供参考）

数据（我相信）已成功返回并正确解析，唯一的问题是我自己不太熟悉（我正在尝试学习更多）

因此，我有一个TableViewController，其中有一个单元格，其中包含以下代码：

struct StoryCellViewModel {
    let id: Int
    let url: String
    let storyPublic, featured: Bool
    let added, modified: String
}

在viewDidLoad（）下的实际TableViewController中，我有这部分脚本：

 print(story)
                self.cellViewModels = story.map{
                    StoryCellViewModel(id: $0.id, url: $0.url, storyPublic: $0.storyPublic, featured: $0.featured, added: $0.added, modified: $0.modified)
                }

再低一点，我有：

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "StoryCell", for: indexPath)

    let cellViewModel = cellViewModels[indexPath.row]
    cell.textLabel?.text = String(cellViewModel.id)
    cell.detailTextLabel?.text = cellViewModel.modified


    return cell
}

我会让大家知道，所有这些工作，id和修改（都只是用作测试，以确保连接和打印工作正常）都很好，但我的问题出现在这里：

如果我们回到结构上，有这一部分：

struct ElementText: Codable {
    let html: Bool
    let text: String
    let elementSet: ElementSet
    let element: Element

    enum CodingKeys: String, CodingKey {
        case html, text
        case elementSet = "element_set"
        case element
    }
}

它引用了示例JSON的以下部分：

"element_texts": [
      {
        "html": false,
        "text": "Woehler and Force Farm Equipment Building",
        "element_set": {
          "id": 1,
          "url": "http://www.ralstoncemetery.com/greeley/api/element_sets/1",
          "name": "Dublin Core",
          "resource": "element_sets"
        },
        "element": {
          "id": 50,
          "url": "http://www.ralstoncemetery.com/greeley/api/elements/50",
          "name": "Title",
          "resource": "elements"
        }
      },
      {
        "html": false,
        "text": "Woehler and Force Farm Equipment",
        "element_set": {
          "id": 1,
          "url": "http://www.ralstoncemetery.com/greeley/api/element_sets/1",
          "name": "Dublin Core",
          "resource": "element_sets"
        },
        "element": {
          "id": 39,
          "url": "http://www.ralstoncemetery.com/greeley/api/elements/39",
          "name": "Creator",
          "resource": "elements"
        }
      },
      {
        "html": false,
        "text": "Street view of the front exterior of Woehler and Force Farm Equipment. Several automobiles are visible through the windows of the store. The alley along the side of the building is also visible. There are several signs along the front of the building reading, 'Farm Equipment,' 'Kaiser Frazer W&F,' and 'Woehler & Force.'; Verso There is a sticker with typed black ink reading, 'Woehler & Force 1316-22 8th Ave. - Greeley, CO 1947. Orig. env. says Liberty Trucker Parts Co./ 690 Lincoln St./F.V. Altwater/POB 1889/Denver, Colo.'",
        "element_set": {
          "id": 3,
          "url": "http://www.ralstoncemetery.com/greeley/api/element_sets/3",
          "name": "Item Type Metadata",
          "resource": "element_sets"
        },
        "element": {
          "id": 54,
          "url": "http://www.ralstoncemetery.com/greeley/api/elements/54",
          "name": "Story",
          "resource": "elements"
        }
      }
    ],

**因此，我的问题是：*我将如何打印出第一个

元素文本

（为

文本

字段设置了“Woehler和Force Farm Equipment Building”的文本）

如果需要进一步解释，我很乐意把它打出来。或者，如果有人能为这种筑巢水平提供任何资源，我将非常感激。谢谢-

首先在“CellForRowat”中调用let cell=dequeueReusableCellWithIdentifier:@“cell”forindexath:indexPath等

---

然后将文本放入单元格。text

创建如下数组<代码>变量alltext=[String]（）

您可以通过多种方式获取json数据，比如JsonDecode/JSONSerialization，我使用的是JSONSerialization。获取数据后，我将文本值附加到数组中

 do {
            let data = try Data(contentsOf: URL(fileURLWithPath: path), options: .mappedIfSafe)
            let jsonResult = try JSONSerialization.jsonObject(with: data, options: .mutableLeaves) as! [String: Any]
            for (key,value) in jsonResult {
                 print(key)
                  if let result2:[[String:Any]] = value as? [[String:Any]]{
                     for dict in result2 {

                        for (key,value) in dict {
                              if key == "text" {
                                 self.AllTexts.append(value as! String)
                             }
                        }
                    }
                  }
            }
            print(self.AllTexts)
        } catch {
            // handle error
            print(error)
        }

• 故事

  是

  故事元素

  的数组（为什么不

  故事

  ？）

• StoryElement

  中属性

  ElementText

  的类型是

  ElementText

因此，基本上需要两个循环来迭代

故事

和

元素文本

for aStory in story {
    for elementText in aStory.elementTexts {
        print(elementText.text)
    }
}

---

嗨，欢迎来到苏。你的问题有很多代码-帮助别人回答你的问题，只考虑你的代码中与问题相关的关键部分。想帮忙的人不想像你想象的那样通读这些。