Codable 函数有什么问题？

Question

以下是我的JSON：

{
   "Books":[
  {
     "title":"book title",
     "Contents":[
        {
           "figure":"Clause33",
           "url":"PressureReleifValve.html",
           "type":"video"
        }
     ]
  }
]
}

结构如下：内容中可能有多个项目。

 struct Books: Codable {
      let title: String
      let contents: [Content]
  }
 struct Content: Codable {
      let figure, url, type: String
  }

代码如下：

guard let books = try? JSONDecoder().decode(Books.self, from: jsonData2) else {
    fatalError("The JSON information has errors")
  }

我的代码有什么问题？

Answer 1

问题出在模型上。用这个。

// MARK: - Books
struct Books: Codable {
    let books: [Book]

    enum CodingKeys: String, CodingKey {
        case books = "Books"
    }
}

// MARK: - Book
struct Book: Codable {
    let title: String
    let contents: [Content]

    enum CodingKeys: String, CodingKey {
        case title
        case contents = "Contents"
    }
}

// MARK: - Content
struct Content: Codable {
    let figure, url, type: String
}


do {
    let books = try JSONDecoder().decode(Books.self, from: jsonData)
} catch let error {
    // handle error
}

您可以将您的 JSON 复制粘贴到此处 https://app.quicktype.io，它会为您生成正确的模型。

Codable 函数有什么问题？

Whats wrong with Codable function?

json

swift

codable