The approach from caram is in general ok but there are so many problems with the code that SmushyTaco did not get it work. Below you will find an “Out of the Box” working solution. 1. UserDefaults propertyWrapper import Foundation import Combine @propertyWrapper struct UserDefault<T> { let key: String let defaultValue: T init(_ key: String, … Read more
The reason you received your original error is that in Swift, Array is a generic container that holds values of a specific type. So you can have an Array<Int> that holds integers, or an Array<String> that holds strings. But you can’t have just an Array. The type of the thing the array contains is the … Read more
The following code should help you resolve your problem: import UIKit class ViewController: UIViewController { var food: [String] { get { if let returnValue = NSUserDefaults.standardUserDefaults().objectForKey(“food”) as? [String] { return returnValue } else { return [“muesli”, “banana”] //Default value } } set { NSUserDefaults.standardUserDefaults().setObject(newValue, forKey: “food”) NSUserDefaults.standardUserDefaults().synchronize() } } override func viewDidLoad() { super.viewDidLoad() print(food) … Read more
You should use the registerDefaults method of NSUserDefaults. Prepare a plist file in your bundle that contains the default preferences and then use that plist to register the defaults. NSString *defaultPrefsFile = [[NSBundle mainBundle] pathForResource:@”defaultPrefs” ofType:@”plist”]; NSDictionary *defaultPreferences = [NSDictionary dictionaryWithContentsOfFile:defaultPrefsFile]; [[NSUserDefaults standardUserDefaults] registerDefaults:defaultPreferences]; You have to execute this code on every launch of your … Read more
Sqlite3 is more useful for keeping large database and to access to the database elements. You can sort the items of Sqlite3 database, you can search very fast for item in Sqlite3 dtabase. Sqlite3 database has many privileges that NSUserDefaults didn’t have ! NSUserDefaults vs Sqlite3 NSUserDefaults is for user preferences, usually basic objects like … Read more
I was having a very similar issue. Background the application. Use other memory heavy applications till my application gets jettisoned from memory. (You can observe this event if you have your device plugged and xcode running the build. Xcode will tell you “application was terminated due to memory pressure). From here if your application is … Read more
You can configure the setting for a particular scheme as follows … 1) Select the scheme from the popup menu and choose Edit Scheme … 2) In the following slide down window add a new entry to Arguments Passed on Launch. Copy and paste the following line. -NSConstraintBasedLayoutVisualizeMutuallyExclusiveConstraints YES
I am assuming an array, but it will work with dictionaries too. Userdefaults, Core Data and Plists can all be read/write but if you use a plist you need to pay attention in what dir you put it. See the plist part down below. Core Data I think it’s way too much overkill, it’s just … Read more
If you terminate your app by pressing the home button (in the Simulator or on the device), your NSUserDefaults will get saved. If you terminate your app by pressing “Stop” in Xcode (in the Simulator or on the device), your NSUserDefaults might get saved, but there’s a good chance they won’t. NSUserDefaults persists any changes … Read more
Swift 3 syntax example Register a boolean default value: UserDefaults.standard.register(defaults: [“SoundActive” : true]) And to get the value: UserDefaults.standard.bool(forKey: “SoundActive”) Sidenote: Although the above code will return true, note that the value isn’t actually written to disk until you set it: UserDefaults.standard.set(true, forKey: “SoundActive”)