Is UserDefaults deprecated in Xcode 10, Swift 4.2?

Question

I am creating an app that requires to have a UserDefaultManager. But unfortunately it shows an error:

Use of unresolved identifier 'UserDefaults'

I tried to solve it by declaring a variable like:

let UserDefaults = NSUserDefaults.standardUserDefaults()

but it is still not working for me. Attached below are my codes for your references. Hope you can help me. By the way I am using xcode 10.

struct UserDefaultsManager {
    private static let isLoggedInKey = "com.example.key.isLoggedIn"

    //  let UserDefaults = NSUserDefaults.standardUserDefaults()

    static func login() {
        UserDefaults.standard.setValue(true, forKey: isLoggedInKey)
        UserDefaults.standard.synchronize()
    }

    static func logout() {
        UserDefaults.standard.setValue(false, forKey: isLoggedInKey)
        UserDefaults.standard.synchronize()
    }

    static func isLoggedIn() -> Bool {
        return UserDefaults.standard.bool(forKey: isLoggedInKey)
    }
}

Your code compiles just fine for me in a Swift 4.2 playground with Xcode 10.1. — rmaddy, Mar 14 '19 at 03:06
Unrelated to your issue but do not use `setValue(_:forKey:)`. Use `setBool(_:forKey:)`. — rmaddy, Mar 14 '19 at 03:07
I don't think it's Deprecated. As far as I know, if it's something Deprecated Xcode still support the Syntax it's just show us `Warning` not an `Error`. You can refer the some of very good tutorial on `UserDefaults' in the link. https://medium.com/@nimjea/userdefaults-in-swift-4-d1a278a0ec79 Hope this works. — Krunal Nagvadia, Mar 14 '19 at 03:53
As far as I can tell there's nothing wrong with your code... Did you try to clean build folder and rebuild? — Nikolaj Simonsen, Mar 14 '19 at 10:09

Quyen Anh Nguyen · Answer 1 · 2019-03-14T07:52:01.647

0

No, it isn't deprecated. This is my code: save data

    let user = UserDefaults.standard
    user.set(userJson.email, forKey: "email")
    user.set(userJson.id, forKey: "id")
    user.set(userJson.username, forKey: "user")

and get data

    let userDefault = UserDefaults.standard
    getEmailToCheck = userDefault.string(forKey: "email") ?? ""
    user_id = userDefault.string(forKey: "id") ?? ""

and you don't need to import Foundation directly in your swift file. Hope this helps you.

edited Mar 14 '19 at 07:52

answered Mar 14 '19 at 03:30

Quyen Anh Nguyen

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2

This does not solve whatever issue the OP is having. – rmaddy Mar 14 '19 at 03:39
so as for me it causes by wrong declaration: let UserDefaults = NSUserDefaults.standardUserDefaults() – Quyen Anh Nguyen Mar 14 '19 at 03:49
But that line is commented out. The code in the question works just fine as-is. – rmaddy Mar 14 '19 at 03:50
Yes, you're right. I run these code and get the same result. May be need more details from the OP. – Quyen Anh Nguyen Mar 14 '19 at 04:06
3

*“you don't need to import Foundation”* – that is not true, or at least misleading. (It might work for you if you import other frameworks or bridging header files which indirectly import the Foundation framework.) – Martin R Mar 14 '19 at 07:38
Oh yes. Sorry about that. My case is bridging header files which indirectly import. – Quyen Anh Nguyen Mar 14 '19 at 07:42
1

Can someone explain why this answer is getting up voted? No offense to the poster but this answer doesn't solve anything. – rmaddy Mar 14 '19 at 15:22

Is UserDefaults deprecated in Xcode 10, Swift 4.2?

1 Answers1