Save dictionary to UserDefaults

Question

I\'m trying to store a dictionary in UserDefaults and always get app crash when the code runs. Here is the sample code which crashes the app when it is executed. I tried to

Answer 1

To store a NSDictionary (with non-string key) in NSUserDefaults you need to convert them to NSData first. Try this

let test = [1:"me"]
override func viewDidLoad() {
    super.viewDidLoad()
    let data = NSKeyedArchiver.archivedData(withRootObject: test)
    let defaults = UserDefaults.standard
    defaults.set(data, forKey: "dict1")
    if let data2 = defaults.object(forKey: "dict1") as? NSData {
        let dict = NSKeyedUnarchiver.unarchiveObject(with: data2 as Data)
        print(dict)
    }
}