我有一个struct
,我需要将它转换成字典
struct ModelFeedbackServices: Codable {
let servicesId: String?
let servicesName: String?
let category: String?
}
我有一个相同类型的数组 ModelFeedbackServices
private var selectedItems = [ModelFeedbackServices]()
我需要将这个数组转换为字典,以便将其添加到我的参数中:
var parameters: [String: Any]? {
var params: [String: Any] = [:]
switch self {
case .submit(let services, let comments):
////////////////////////////////////////////////////////////////////////////////////
params["FEEDBACK_SERVICES"] = services.asDictionary // Here it comes as nil!
////////////////////////////////////////////////////////////////////////////////////
params["COMMENTS"] = comments
return params
}
}
我已经创建了 extension Encodable
:
extension Encodable {
var asDictionary: [String: Any]? {
guard let data = try? JSONEncoder().encode(self) else { return nil }
return (try? JSONSerialization.jsonObject(with: data, options: .allowFragments)).flatMap { $0 as? [String: Any] }
}
}
问题是每次我在 switch
语句中的 services.asDictionary
中得到一个 nil
值
我需要这样的字典
{
"FEEDBACK_SERVICES": [
{
"SERVICE_ID": "8",
"SERVICE_NAME": "ABC",
"CATEGORY": "1"
},
{
"SERVICE_ID": "4",
"SERVICE_NAME": "ABC",
"CATEGORY": "2"
}
],
"COMMENTS": "any comment"
}
任何想法都会有帮助
最佳答案
你可以引入这个Encodable
扩展来得到Dictionary
或者Dictionary
的Array
typealias JSON = [String: Any]
extension Encodable {
/// Converting object to postable JSON
func toDictionary(_ encoder: JSONEncoder = JSONEncoder()) -> JSON {
guard let data = try? encoder.encode(self) else { return [:] }
guard let object = try? JSONSerialization.jsonObject(with: data, options: .allowFragments) else { return [:] }
guard let json = object as? JSON else { return [:] }
return json
}
/// Converting object to postable array of JSON
func toDictionaryArray(_ encoder: JSONEncoder = JSONEncoder()) -> [JSON] {
guard let data = try? encoder.encode(self) else { return [[:]] }
guard let object = try? JSONSerialization.jsonObject(with: data, options: .allowFragments) else { return [[:]] }
guard let jsonArray = object as? [JSON] else { return [[:]] }
return jsonArray
}
}
用法
var parameters: [String: Any]? {
var params: [String: Any] = [:]
switch self {
case .submit(let services, let comments):
////////////////////////////////////////////////////////////////////////////////////
params["FEEDBACK_SERVICES"] = services.toDictionaryArray() // Here it comes as nil!
////////////////////////////////////////////////////////////////////////////////////
params["COMMENTS"] = comments
return params
}
}
关于ios - Swift struct array into Dictionary 抛出一个 nil 值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55902497/