Save array from JSON in user default and read array values back - swift

Question

I'm retrieving a JSON dict with the following structure:
"SITES": [
{
"NAME": “ALICE LANE”,
"WEBSITEAPPID": “XYZ”
}
]
}
I'm saving that straight into user defaults like this:
UserDefaults.standard.set(JSON(dict as Any)["SITES"].stringValue, forKey: "adminSites")
I know there is data in the JSON because the below code provides two rows of array data:
if let arraySites = dict?["SITES"] as? [[String: Any]] {
for sitesDetails in arraySites {
print(sitesDetails["NAME"] as Any)
print(sitesDetails["WEBSITEAPPID"] as Any)
}
}
When I try print the user default data count, I get 0
let defaultAdminSites = defaults.object(forKey: "adminSites") as? [String] ?? [String]()
print(defaultAdminSites.count)
Why am I getting 0 results? How would get the array row details if I did for ["NAME"] and ["WEBSITEAPPID"]?

Answer 1

I would recommend using a model object and Codable to avoid all those casts:
struct Model: Codable {
let sites: [Site]
enum CodingKeys: String, CodingKey {
case sites = "SITES"
}
}
struct Site: Codable {
let name, websiteAppid: String
enum CodingKeys: String, CodingKey {
case name = "NAME"
case websiteAppid = "WEBSITEAPPID"
}
}
// write to defaults
let model = Model(sites: [Site(name: "foo", websiteAppid: "bar")])
do {
let siteData = try JSONEncoder().encode(model)
UserDefaults.standard.set(siteData, forKey: "adminSites")
} catch {
print(error)
}
// read from defaults
if let siteData = UserDefaults.standard.data(forKey: "adminSites") {
do {
let model = try JSONDecoder().decode(Model.self, from: siteData)
for site in model.sites {
print(site.name, site.websiteAppid)
}
} catch {
print(error)
}
}

Answer 2

UserDefault Save Json Response
let result = jsonDict["SITES"] as? NSArray ?? []
let data = try! NSKeyedArchiver.archivedData(withRootObject: result, requiringSecureCoding: false)
UserDefaults.standard.set(data, forKey: "adminSites")
Get UserDefault data
let result = UserDefaults.standard.data(forKey: "adminSites")
if result != nil{
let data = try! NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(result!) as? NSArray ?? []
print("Current User Details : - \(data)")
}