UserDefaults saving array of dictionaries - ios

Question

I'm trying to save dictionary into UserDefaults And then I want to fetch data or delete.
class userDefaultsManager {
static func getAllUsers()->[UserModel]{
if let all = UserDefaults.standard.array(forKey: "usersKey") as? [Dictionary<String,Any>] {
return all.map{UserModel.init(dictionary: $0)}
}
return []
}
static func insertUser(name:String, email:String)->Bool {
let newUserModel = UserModel.init(name: name, email: email)
var all = getAllUser()
all.append(newUserModel)
UserDefaults.standard.set(all.map{$0.dictionary}, forKey: "usersKey")
return UserDefaults.standard.synchronize()
}
static func deleteUser(email:String)->Bool {
var all = getAllUser()
let index = all.index{$0.email == email}
if index != nil {
all.remove(at: index!)
UserDefaults.standard.set(all.map{$0.dictionary}, forKey: "usersKey")
UserDefaults.standard.synchronize()
return true
} else {
return false
}
}
}
class UserModel:NSObject{
var name: String!
var email: String!
init(name:String, email:String) {
self. name = name
self. email = email
super.init()
}
init(dictionary:[String:Any]) {
self.name = ""
self.email = ""
super.init()
self.setValuesForKeys(dictionary)
}
var dictionary:[String:Any] {
return self.dictionaryWithValues(forKeys: ["name","email"]) //Error here
}
}
The code working on swift 3 but I got error with swift 4 on var dictionary:[String:Any]
here is the error:
implicit Objective-C entrypoint -[Myapp.UserModel name] is
deprecated and will be removed in Swift 4
Please any help to fix this will be appreciated.

Answer 1

Your classes inherited from NSObject, and using objc KVC, it was fine for Swift3, because Swift3 assumed all NSObject subclasses as #objc by default, in Swift4 you need to declare your accessors #objc to make them available for obj-c KVC operations.
https://forums.developer.apple.com/thread/81789