JSONDecoder未能解码嵌套字典
JSONDecoder未能解码嵌套字典
提问于 2019-03-26 14:34:11
我使用JSONDecoder从一个具有嵌套字典的JSON文件中解码。它无法从json数据解码到我的自定义模型。
这就是我在代码中尝试过的。
- JSONDecoder看起来如下所示：
let netWorkManager = NetWorkManager(URL: url, httpMethodType: .GET)
netWorkManager.callAPI { (data, status, error) in
guard let data = data else {
onFail(NetWorkError.otherError)
return
}
switch status {
case 200:
do{
if let responseModel = try JSONDecoder().decode(ResonseModel?.self, from: data) {
onSuccess(responseModel)
}
}catch {
onFail(NetWorkError.otherError)
}
default:
onFail(NetWorkError.otherError)
}
}- 模型如下：
struct ResonseModel: Codable {
let type : String
let format: String
let data: [String: Champion]
struct Champion: Codable {
let version: String
let id: String
let key: Int
let name: String
let title: String
let blurb: String
}
}- JSON结构如下所示：
{
"type": "champion",
"format": "standAloneComplex",
"version": "9.3.1",
"data": {
"Aatrox": {
"version": "9.3.1",
"id": "Aatrox",
"key": "266",
"name": "Aatrox",
"title": "the Darkin Blade",
"blurb": "Once honored defenders of Shurima against the Void, Aatrox and his brethren would eventually become an even greater threat to Runeterra, and were defeated only by cunning mortal sorcery. But after centuries of imprisonment, Aatrox was the first to find...",
"info": {
"attack": 8,
"defense": 4,
"magic": 3,
"difficulty": 4
},
"tags": [
"Fighter",
"Tank"
],
"partype": "Blood Well",
},
"Ahri": {
"version": "9.3.1",
"id": "Ahri",
"key": "103",
"name": "Ahri",
"title": "the Nine-Tailed Fox",
"blurb": "Innately connected to the latent power of Runeterra, Ahri is a vastaya who can reshape magic into orbs of raw energy. She revels in toying with her prey by manipulating their emotions before devouring their life essence. Despite her predatory nature...",
"info": {
"attack": 3,
"defense": 4,
"magic": 8,
"difficulty": 5
},
"tags": [
"Mage",
"Assassin"
],
"partype": "Mana",
},
...这是JSON的链接，如果您想查看它：US/champion.json
我想将"data“属性解码为字典，其键是冠军的名称，值是冠军。但是jsonDecoder似乎不认识我的模型结构。它最终会抓住错误。
回答 2
Stack Overflow用户
发布于 2019-03-26 15:01:14
JSON参数"key“不是Integer。
将其更改为String，它将工作：
struct ResonseModel: Codable {
let type : String
let format: String
let data: [String: Champion]
struct Champion: Codable {
let version: String
let id: String
let key: String
let name: String
let title: String
let blurb: String
}
}Stack Overflow用户
发布于 2019-03-26 19:21:25
您可以切换到手动解码冠军，以清理数据。
struct ResonseModel: Decodable {
let type : String
let format: String
let data: [String: Champion]
struct Champion: Decodable {
let version: String
let id: String
let key: Int
let name: String
let title: String
let blurb: String
enum CodingKeys: String, CodingKey {
case version, id, key, name, title, blurb
}
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
self.version = try container.decode(String.self, forKey: .version)
self.id = try container.decode(String.self, forKey: .id)
guard let key = Int(try container.decode(String.self, forKey: .key)) else {
throw DecodingError.valueNotFound(Int.self,
.init(codingPath: decoder.codingPath,
debugDescription: "Bad value for id"))
}
self.key = key
self.name = try container.decode(String.self, forKey: .name)
self.title = try container.decode(String.self, forKey: .title)
self.blurb = try container.decode(String.self, forKey: .blurb)
}
}
}这基本上是编译器为您编写的代码；它只是将字符串转换为int，因为这正是您真正想要的。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/55359730
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