How to delete a user default value in NSUserDefaults?

Question

I.e., my app sets some standard default values at the beginning. Then those values may get overridden by the user. And when the user messes things up, I want to set those se

Answer 1

Updated for Swift 3.0 code:

UserDefaults.standard.removeObject(forKey: "YOURKEY")

Answer 2

In Swift 4

    UserDefaults.standard.removeObject(forKey: "your_key")
    UserDefaults.standard.synchronize()

Answer 3

Use this code

[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"MyKey"];

dont forget to synchronize if you want to save immediately

[[NSUserDefaults standardUserDefaults] synchronize];

NSUserDefaults Class Reference

synchronize - This method is automatically invoked at periodic intervals, use this method only if you cannot wait for the automatic synchronization (for example, if your application is about to exit) or if you want to update the user defaults to what is on disk even though you have not made any changes.

Swift 5:

UserDefaults.standard.removeObject(forKey: "MyKey")
UserDefaults.standard.synchronize()

Answer 4

NSUserDefaults * removeUD = [NSUserDefaults standardUserDefaults];
[removeUD removeObjectForKey:@"shoping"];
[[NSUserDefaults standardUserDefaults]synchronize ];

Answer 5

Swift version for easy copy pasting:

var idForUserDefaults = "somestupidtext"
var userDefaults = NSUserDefaults.standardUserDefaults()
userDefaults.removeObjectForKey(idForUserDefaults)
userDefaults.synchronize()

or

NSUserDefaults.standardUserDefaults().removeObjectForKey("somestupidtext")
NSUserDefaults.standardUserDefaults().synchronize()

Answer 6

Swift way

UserDefaults.standard.removeObject(forKey: "aKey")
UserDefaults.standard.synchronize()