UserDefaults 保存字典数组

Question

我正在尝试将字典保存到 UserDefaults 中，然后我想获取数据或删除。

class userDefaultsManager {

   static func getAllUsers()->[UserModel]{

       if let all = UserDefaults.standard.array(forKey: "usersKey") as? [Dictionary<String,Any>] {
           return all.map{UserModel.init(dictionary: [=10=])}
       }
       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{[=10=].dictionary}, forKey: "usersKey")

        return UserDefaults.standard.synchronize()
    }

    static func deleteUser(email:String)->Bool {

        var all = getAllUser()
        let index = all.index{[=10=].email == email}

        if index != nil {

            all.remove(at: index!)

            UserDefaults.standard.set(all.map{[=10=].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
    }
}

代码在 swift 3 上运行，但我在 var dictionary:[String:Any]

上遇到 swift 4 错误

这里是错误：

implicit Objective-C entrypoint -[Myapp.UserModel name] is deprecated and will be removed in Swift 4

如有任何帮助解决此问题，我们将不胜感激。

Answer 1

你的类继承自NSObject，并使用objc KVC，这对Swift3来说没问题，因为Swift3默认将所有NSObject子类假定为@objc，在Swift4中你需要声明你的访问器 @objc 使它们可用于 obj-c KVC 操作。 https://forums.developer.apple.com/thread/81789

UserDefaults 保存字典数组

UserDefaults saving array of dictionaries

ios

swift

userdefaults