使用JSONDecoder Swift解码

Question

与下面的json对应的数据模型是什么？

{ 
   dog:
   {
      type: "dog",
      logoLocation: "url1"
   },
   pitbull: 
   {
       type: "pitbull",
       logoLocation: "url2"
    }
}

这是一本字典所以我试了一下

class PhotosCollectionModel: Codable {
    var photoDictionary: Dictionary<String, PhotoModel>?
}

class PhotoModel: Codable {
    var type: String?
    var logoLocation: String?
}

但这是行不通的。有什么帮助吗？

Answer 1

你需要

struct Root: Codable {
    let dog, pitbull: Dog
}

struct Dog: Codable {
    let type, logoLocation: String  // or let logoLocation:URL
}

正确的json

{
    "dog":
    {
        "type": "dog",
        "logoLocation": "url1"
    },
    "pitbull":
    {
        "type": "pitbull",
        "logoLocation": "url2"
    }
}

用于动态

只需在解码器中使用[String:Dog]

    do {

        let res  = try JSONDecoder().decode([String:Dog].self,from:data)
    }
    catch {

        print(error)
    }

Answer 2

我会跳过第一节课

class PhotoModel: Codable {
    var type: String
    var logoLocation: String
}

然后像字典一样解码

do {
    let decoder = JSONDecoder()
    let result = try decoder.decode([String: PhotoModel].self, from: data)
    result.forEach { (key,value) in
        print("Type: \(value.type), logo: \(value.logoLocation) (key: \(key))")
    }
} catch  {
    print(error)
}

输出

类型:狗，标志: url1 (键:狗) 型号: pitbull，徽标: url2 (键: pitbull)

这两个属性实际上都是可选的，如果不是，我建议您删除?中的任何不必要的PhotoModel (我做了)