nsuserdefaults – Page 6

How to store custom objects in NSUserDefaults

October 3, 2022 by Tarik

On your Player class, implement the following two methods (substituting calls to encodeObject with something relevant to your own object): – (void)encodeWithCoder:(NSCoder *)encoder { //Encode properties, other class variables, etc [encoder encodeObject:self.question forKey:@”question”]; [encoder encodeObject:self.categoryName forKey:@”category”]; [encoder encodeObject:self.subCategoryName forKey:@”subcategory”]; } – (id)initWithCoder:(NSCoder *)decoder { if((self = [super init])) { //decode properties, other class vars self.question … Read more

iOS: How to store username/password within an app?

October 2, 2022 by Tarik

You should always use Keychain to store usernames and passwords, and since it’s stored securely and only accessible to your app, there is no need to delete it when app quits (if that was your concern). Apple provides sample code that stores, reads and deletes keychain items and here is how to use the keychain … Read more

Clearing NSUserDefaults

October 1, 2022 by Tarik

You can remove the application’s persistent domain like this: NSString *appDomain = [[NSBundle mainBundle] bundleIdentifier]; [[NSUserDefaults standardUserDefaults] removePersistentDomainForName:appDomain]; In Swift 3 and later: if let bundleID = Bundle.main.bundleIdentifier { UserDefaults.standard.removePersistentDomain(forName: bundleID) } This is similar to the answer by @samvermette but is a little bit cleaner IMO.