class LeadsEntity: NSObject, Mappable {
var name: String?
var mobile: String?
var address: String?
var coords: String?
var stime: String?
override init() {}
required init?(map: Map) {}
func mapping(map: Map) {
name <- map["name"]
mobile <- map["mobile"]
address <- map["address"]
coords <- map["coords"]
stime <- map["stime"]
}
}
I am using this method to convert model to json string
func json(from object: Any) -> String? {
let JSONString = (object as! [LeadsEntity]).toJSONString(prettyPrint: true)?.replacingOccurrences(of: "\n", with: "").replacingOccurrences(of: " ", with: "")
return JSONString
}
but it converts like this
I am not able to remove \ and I also tried to remove by .replacingOccurrences(of: "\", with: "", options: NSString.CompareOptions.literal, range:nil) but no success. Thanks in advance.
Give him the model here (type: T.self) and put the Data here (from: data)
do {
let decoded = self.decodeJSON(type: T.self, from: data)
} catch {}
func decodeJSON<T: Decodable>(type: T.Type, from: Data?) -> T? {
let decoder = JSONDecoder()
guard let data = from else { return nil }
do {
let objects = try decoder.decode(type.self, from: data)
return objects
} catch let jsonError {
print("Failed to decode response JSON", jsonError)
return nil
}
}
Related
I have my UserDefaults like this
fileprivate enum userdefaultKeys: String {
userSearchHistory = "userSearchHistory",
}
extension UserDefaults {
static func getUserSearchHistory() -> SearchHistory? {
let data = self.standard.data(forKey: userdefaultKeys.userSearchHistory.rawValue)
return SearchHistory.decode(json: data)
}
static func setUserSearchHistory(userSearchHistory: SearchHistory?) {
guard let json: Any = userSearchHistory?.json else { return }
self.standard.set(json, forKey: userdefaultKeys.userSearchHistory.rawValue)
}
}
And I'm saving this data to the UserDefaults
struct SearchHistory: Codable {
let type: SearchHistoryEnum
let name: String
let corpNo: String
let storeNo: String
let long: Double
let lat: Double
}
enum SearchHistoryEnum: Codable {
case storeSearch
case jsonSearch
}
let historySearch = SearchHistory(type: SearchHistoryEnum.storeSearch, name: store?.storename ?? "", corpNo: store?.corpno ?? "", storeNo: store?.storeno ?? "", long: longtitude, lat: latitude)
UserDefaults.setUserSearchHistory(userSearchHistory: historySearch)
This is okay, but it saves only one instance of SearchHistory in the time. I would like to have max 5. When 6th instance comes, I would like to delete the most old one
First of all your enum doesn't compile, you probably mean
fileprivate enum UserdefaultKeys: String {
case userSearchHistory
}
It's not necessary to specify the raw value.
Second of all I highly recommend not to fight the framework and to conform to the UserDefaults pattern to overload the getter and setter. I don't know your special methods for decoding and encoding, this is a simple implementation with standard JSONDecoder and JSONEncoder
extension UserDefaults {
func searchHistory(forKey key: String = UserdefaultKeys.userSearchHistory.rawValue) -> SearchHistory? {
guard let data = data(forKey: key) else { return nil }
return try? JSONDecoder().decode(SearchHistory.self, from: data)
}
func searchHistory(forKey key: String = UserdefaultKeys.userSearchHistory.rawValue) -> [SearchHistory]? {
guard let data = data(forKey: key) else { return nil }
return try? JSONDecoder().decode([SearchHistory].self, from: data)
}
func set(_ value: SearchHistory, forKey key: String = UserdefaultKeys.userSearchHistory.rawValue) {
guard let data = try? JSONEncoder().encode(value) else { return }
set(data, forKey: key)
}
func set(_ value: [SearchHistory], forKey key: String = UserdefaultKeys.userSearchHistory.rawValue) {
guard let data = try? JSONEncoder().encode(value) else { return }
set(data, forKey: key)
}
}
The benefit is the syntax is always the same for a single item or for an array
let historySearch = SearchHistory(type: SearchHistoryEnum.storeSearch, name: store?.storename ?? "", corpNo: store?.corpno ?? "", storeNo: store?.storeno ?? "", long: longtitude, lat: latitude)
UserDefaults.standard.set(historySearch)
or
UserDefaults.standard.set([historySearch])
The code to delete the oldest put in the method to write the data.
I'm trying to get custom object which is hashable from UserDefault.
My custom model is defined below:
class WorkerProfileResponse: Mappable, Hashable{
static func == (lhs: WorkerProfileResponse, rhs: WorkerProfileResponse) -> Bool {
return lhs.id == rhs.id
}
var hashValue: Int{
return self.id!
}
var id, loginStatus, lastLogin, lastActive: Int?
var username, email, mobileNumber: String?
var userCategories: [String]?
var userSubCategories: [String]?
var biometricToken: String?
var accessToken: AccessToken?
var userStatus: UserStatus?
var userProfile: UserProfile?
required init(map: Map) {
}
func mapping(map: Map) {
id <- map["id"]
loginStatus <- map["is_logged_in"]
lastLogin <- map["last_login"]
lastActive <- map["last_active"]
biometricToken <- map["biometricToken"]
username <- map["username"]
email <- map["email"]
mobileNumber <- map["mobile_number"]
accessToken <- map["accessToken"]
userStatus <- map["userStatus"]
userCategories <- map["userCategories"]
userSubCategories <- map["userSubCategories"]
userProfile <- map["userProfile"]
}
}
My userdefault method is:
class func getModel<T: Hashable>(key: String) -> T {
let decoded = UserDefaults.standard.data(forKey: key)
let decodedModel = NSKeyedUnarchiver.unarchiveObject(with: decoded!) as! T
return decodedModel
}
And I'm calling it like this:
UserDefault.getModel(key: "workerProfile")
App is crashing when I'm calling this method I don't understand the reason, error is:
error: generic parameter 'T' could not be inferred
I'm answering my own question, if it helps anyone in the future.
It was crashing while decoding because there was no value present in userdefault.
This line had the issue because of force casting:
let decodedModel = NSKeyedUnarchiver.unarchiveObject(with: decoded!) as! T
I've changes this method:
class func getModel<T: Hashable>(key: String) -> T {
let decoded = UserDefaults.standard.data(forKey: key)
let decodedModel = NSKeyedUnarchiver.unarchiveObject(with: decoded!) as! T
return decodedModel
}
To this:
class func getModel<T: Hashable>(key: String) -> T? {
let decoded = UserDefaults.standard.data(forKey: key)
if decoded != nil{
let decodedModel = NSKeyedUnarchiver.unarchiveObject(with: decoded!) as! T
return decodedModel
}
else
{
return nil
}
}
I want to parse JSON data into a struct object but i can't do it.
Actually the code is in different files but here i'm posting it as a whole.
Here is my code :
import Foundation
struct dataResponse: Decodable {
var results: [userData]
init(from decoder: Decoder) throws {
var results = [userData] ()
var container = try decoder.unkeyedContainer()
while !container.isAtEnd {
if let route = try? container.decode(userData.self) {
results.append(route)
}
else {
_ = try? container.decode(dummyData.self)
}
}
self.results = results
}
}
private struct dummyData: Decodable { }
enum dataError: Error {
case dataUnavailable
case cannotProcessData
}
struct userData: Codable {
var avatar: String
var city: String
var contribution: Int
var country: String
var friendOfCount: Int
var handle: String
var lastOnlineTimeSeconds: Int
var maxRank: String
var maxRating: Int
var organization: String
var rank: String
var rating: Int
var registrationTimeSeconds: Int
var titlePhoto: String
}
struct dataRequest {
let requestUrl: URL
init(){
self.requestUrl = URL(string: "https://codeforces.com/api/user.info?handles=abhijeet_ar")!
}
func getData(completionHandler: #escaping(Result<[userData], dataError>) -> Void) {
URLSession.shared.dataTask(with: self.requestUrl) { (data,response, error) in
guard let data = data else {
completionHandler(.failure(.dataUnavailable))
print("-------bye-bye--------")
return
}
do {
print("-------entered--------")
// let dataresponse = try JSONDecoder().decode([userData].self, from: data)
// print(type(of: dataresponse))
// completionHandler(.success(dataresponse))
let jsonResult = try JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
print(jsonResult)
completionHandler(.success(jsonResult as! [userData]))
}
catch {
completionHandler(.failure(.cannotProcessData))
}
}.resume()
}
}
here userData is my struct
the error says : Could not cast value of type '__NSDictionaryM' (0x7fff8fe2dab0) to 'NSArray' (0x7fff8fe2dd30).
I would appreciate if anyone helps, thanks.
You are making a very common mistake.
You are ignoring the root object which is a dictionary and causes the error.
struct Root: Decodable {
let status : String
let result: [UserData]
}
struct UserData: Decodable {
let avatar: String
let city: String
let contribution: Int
let country: String
let friendOfCount: Int
let handle: String
let lastOnlineTimeSeconds: Int
let maxRank: String
let maxRating: Int
let organization: String
let rank: String
let rating: Int
let registrationTimeSeconds: Int
let titlePhoto: String
}
Forget JSONSerialization and use only JSONDecoder
And it's not a good idea to return meaningless enumerated errors. Use Error and return the real error.
You get the array with dataresponse.result
struct DataRequest { // name structs always with starting capital letter
let requestUrl: URL
init(){
self.requestUrl = URL(string: "https://codeforces.com/api/user.info?handles=abhijeet_ar")!
}
func getData(completionHandler: #escaping(Result<Root, Error>) -> Void) {
URLSession.shared.dataTask(with: self.requestUrl) { (data,response, error) in
guard let data = data else {
completionHandler(.failure(error!))
print("-------bye-bye--------")
return
}
do {
print("-------entered--------")
let dataresponse = try JSONDecoder().decode(Root.self, from: data)
completionHandler(.success(dataresponse))
}
catch {
completionHandler(.failure(error))
}
}.resume()
}
}
And consider that if status is not "OK" the JSON response could be different.
Your problem is you are using the wrong struct. Create and use a Response struct for decoding. You need to keep your Types to have the first letter in capital to avoid confusion. You could use the JSONDecoder() maybe you are using something that doesn't have the correct format. Try the below code.
struct Response: Codable {
var result: [UserData]
}
enum DataError: Error {
case dataUnavailable, cannotProcessData
}
struct DataRequest {
let requestUrl: URL
init(){
self.requestUrl = URL(string: "https://codeforces.com/api/user.info?handles=abhijeet_ar")!
}
func getData(completionHandler: #escaping(Result<Response, DataError>) -> Void) {
URLSession.shared.dataTask(with: self.requestUrl) { (data,response, error) in
guard let data = data else {
completionHandler(.failure(.dataUnavailable))
return
}
do {
let dataresponse = try JSONDecoder().decode(Response.self, from: data)
completionHandler(.success(dataresponse))
} catch {
completionHandler(.failure(.cannotProcessData))
}
}.resume()
}
}
Note: Parameters in UserData always needs to right. Try with and Empty struct to check if everything else is working then proceed to adding the variable one-by-one.
I have a JSON that has ID's in the root level:
{
"12345": {
"name": "Pim"
},
"54321": {
"name": "Dorien"
}
}
My goal is to use Codable to create an array of User objects that have both name and ID properties.
struct User: Codable {
let id: String
let name: String
}
I know how to use Codable with a single root level key and I know how to work with unknown keys. But what I'm trying to do here is a combination of both and I have no idea what to do next.
Here's what I got so far: (You can paste this in a Playground)
import UIKit
var json = """
{
"12345": {
"name": "Pim"
},
"54321": {
"name": "Dorien"
}
}
"""
let data = Data(json.utf8)
struct User: Codable {
let name: String
}
let decoder = JSONDecoder()
do {
let decoded = try decoder.decode([String: User].self, from: data)
decoded.forEach { print($0.key, $0.value) }
// 54321 User(name: "Dorien")
// 12345 User(name: "Pim")
} catch {
print("Failed to decode JSON")
}
This is what I'd like to do:
let decoder = JSONDecoder()
do {
let decoded = try decoder.decode([User].self, from: data)
decoded.forEach { print($0) }
// User(id: "54321", name: "Dorien")
// User(id: "12345", name: "Pim")
} catch {
print("Failed to decode JSON")
}
Any help is greatly appreciated.
You can use a custom coding key and setup User as below to parse unknown keys,
struct CustomCodingKey: CodingKey {
let intValue: Int?
let stringValue: String
init?(stringValue: String) {
self.intValue = Int(stringValue)
self.stringValue = stringValue
}
init?(intValue: Int) {
self.intValue = intValue
self.stringValue = "\(intValue)"
}
}
struct UserInfo: Codable {
let name: String
}
struct User: Codable {
var id: String = ""
var info: UserInfo?
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CustomCodingKey.self)
if let key = container.allKeys.first {
self.id = key.stringValue
self.info = try container.decode(UserInfo.self, forKey: key)
}
}
func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CustomCodingKey.self)
if let key = CustomCodingKey(stringValue: self.id) {
try container.encode(self.info, forKey: key)
}
}
}
let decoder = JSONDecoder()
do {
let decoded = try decoder.decode(User.self, from: data)
print(decoded.id) // 12345
print(decoded.info!.name) // Pim
} catch {
print("Failed to decode JSON")
}
I use AlamofireObjectMapper extension. I want to get response, but it's failed. My tableLeague object is always nil because code with response closure doesn't call ({ (response: DataResponse) in
if response.result.isSuccess {
tableLeague = response.result.value
} doesn't call). I use next methods:
let header = ["X-Auth-Token":"1231231"]
static let sharedInstance = ServerAPI()
private func getRequest(uri: String) -> DataRequest {
return Alamofire.request(uri, method: .get, headers: header)
}
public func getTableLeague() -> TableLeague {
var tableLeague: TableLeague?
getRequest(uri: URL).responseObject { (response: DataResponse<TableLeague>) in
if response.result.isSuccess {
tableLeague = response.result.value
}
}
return tableLeague!
}
And use in business class:
public func readTableLeague() -> TableLeague {
let tableLeague = ServerAPI.sharedInstance.getTableLeague()
return tableLeague
}
I think it can be because response haven't yet but i try to set object that i haven't yet
Whats a problem? Completion handlers i need to use else?
Please try to map by following structure
class Response: Mappable {
var success: Bool?
var data: [Data]?
required init?(_ map: Map) {
mapping(map)
}
func mapping(map: Map) {
success <- map["success"]
data <- map["data"]
}
}
class Data: Mappable {
var uid: Int?
var name: String?
// add other field which you want to map
required init?(_ map: Map) {
mapping(map)
}
func mapping(map: Map) {
uid <- map["uid"]
name <- map["name"]
}
}
When you get JSON response simple map by this syntax
let response = Mapper<Response>().map(responseObject)
if let id = response?.data?[0].uid {
println(id)
}