使用 JSONDecoder 解码 Swift

Question

下面json对应的数据模型是什么？

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

这是字典中的字典所以我试过了，

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

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

但它不起作用。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json

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

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

我会跳过第一个 class 并保留

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

然后像字典一样解码它

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)
}

产出

Type: dog, logo: url1 (key: dog)
Type: pitbull, logo: url2 (key: pitbull)

这两个属性真的都是可选的吗，如果不是，我建议您删除 PhotoModel 中不必要的 ?（我删除了）

使用 JSONDecoder 解码 Swift

Decode using JSONDecoder Swift

ios

swift

jsonparser

decodable