Json 需要解码字典<；字符串，任意>；但是找到了一个字符串/数据

我正在使用docodable协议，出现以下错误：

typeMismatch(Swift.Dictionary<Swift.String, Any>, Swift.DecodingError.Context(codingPath: [MakeApp_v2.Params.(CodingKeys in _244BBB2F32A8C5CF3DB84B0C6A94B232).config, Swift._DictionaryCodingKey(stringValue: "table", intValue: nil)], debugDescription: "Expected to decode Dictionary<String, Any> but found a string/data instead.", underlyingError: nil))

我的结构

struct Params: Decodable {
  let callBackID: String, method: Int, parName: String, pageID: String?, table: String?, fields: [String: Properties]?, imageid: String?, imagetable: String?, config: [String: Config]?, appTemplate: String?, appName: String?, values: Properties?, columns: [String: Properties]?, filter: [String: Properties]?

  private enum CodingKeys: String, CodingKey {
    case callBackID = "callBackID", method = "method", parName = "parName", pageID = "pageID", table = "table", fields = "fields", imageid = "imageid", imagetable = "imagetable", config = "config", appTemplate = "appTemplate", appName = "appName", values = "values", columns = "columns", filter = "filter"
  }
}

struct Properties: Decodable {
  let source: String?, type: String?, rec_id: String?, name: String?, value: String?
}

struct Config: Decodable {
  let table: String?

  private enum CodingKeys: String, CodingKey {
    case table = "table"
  }
}

获取JSON数据

var param: Params?
do {
    let jsonData = try JSONSerialization.data(withJSONObject: message.body, options: .prettyPrinted)
    print(String(data: jsonData, encoding: .utf8)!)
    param = try JSONDecoder().decode(Params.self, from: jsonData)
    print(param!)
} catch {
    print(error)
}
methods(param: param!)
print(methods)
}

func methods(param: Params) -> String { return "some string" }

---

我有3组JSON数据结构，前两组可以很好地使用这种结构，但是上面的一组JSON数据会使程序停止。我不知道我的代码要更新什么。我希望你能帮我解决这个问题，蒂亚

我只是把我的评论转换成一个更清晰的答案

---

问题在于

config:[String:config]？

内部

Params

结构。从JSON中可以明显看出，您的键是

config

，值是

config

type对象，而不是

Dictionary

类型。因此，将config属性更改为

config:config？

另一个注意事项：当

struct

中的属性与JSON键相同时，可以省略

CodingKeys

enum（与

属性

struct一样）

额外注意：我在您的结构定义中看到了很多

可选的
s。请只考虑真正需要<代码>可选<代码>类型的情况。不要只是不必要地使用它们

struct Params: Decodable {
    let callBackID: String
    let method: Int
    let parName: String
    let pageID: String?
    let table: String?
    let fields: [String: Properties]?
    let imageid: String?
    let imagetable: String?
    let config: Config?
    let appTemplate: String?
    let appName: String?
    let values: Properties?
    let columns: [String: Properties]?
    let filter: [String: Properties]?
}

为了进一步说明，我怀疑更多的是，您稍后还会遇到
[String:Properties]？
类型的问题。这更像是我怀疑的
config
属性

对不起，我的错！“我的密钥配置”的对象类型错误。改为config=[String:config？]改为config=config？要归功于@nayem
问题在于
config:[String:config]？
内部
Params
结构。从JSON中可以明显看出，您的键是
config
，值是
config
type对象，而不是
Dictionary
类型。因此，将config属性更改为
config:config？
应该可以解决问题。lol，我没有注意到这一点。也许我仍然对这件事感到不满。呵呵，谢谢@nayemmore，我的密钥是可选的，因为在我的api上我发送不同的json结构，有些密钥存在，或者存在，但值为零；有时我不把钥匙寄出去。嗨@不，我还有一个问题。基于上面的json，如何显示“config”的数据？我认为我的结构配置没有帮助。
struct Params: Decodable {
    let callBackID: String
    let method: Int
    let parName: String
    let pageID: String?
    let table: String?
    let fields: [String: Properties]?
    let imageid: String?
    let imagetable: String?
    let config: Config?
    let appTemplate: String?
    let appName: String?
    let values: Properties?
    let columns: [String: Properties]?
    let filter: [String: Properties]?
}

struct Params: Decodable {
  let callBackID: String, method: Int, parName: String, pageID: String?, table: String?, fields: [String: Properties]?, imageid: String?, imagetable: String?, config: Config?, appTemplate: String?, appName: String?, values: Properties?, columns: [String: Properties]?, filter: [String: Properties]?

  private enum CodingKeys: String, CodingKey {
    case callBackID = "callBackID", method = "method", parName = "parName", pageID = "pageID", table = "table", fields = "fields", imageid = "imageid", imagetable = "imagetable", config = "config", appTemplate = "appTemplate", appName = "appName", values = "values", columns = "columns", filter = "filter"
  }
}

struct Properties: Decodable {
  let source: String?, type: String?, rec_id: String?, name: String?, value: String?
}

struct Config: Decodable {
  let table: String?

  private enum CodingKeys: String, CodingKey {
    case table = "table"
  }
}