CODEWITHSUNDEEP
iosswiftdictionarynsdictionarynsuserdefaults
Fittoburst
Fittoburst

Reputation: 2305

iOS/Swift 1.2 NSDictionray/Dictionary on NSStandardUserDefaults

In the 'old' Swift, I used to register my defaults loaded from a .plist file like this...

let prefs = NSBundle.mainBundle().pathForResource("UserDefaults", ofType: "plist");
let dict = NSDictionary(contentsOfFile: prefs!);
let defaults:NSDictionary! = dict?.valueForKey("defaults") as! NSDictionary;

NSUserDefaults.standardUserDefaults().registerDefaults(defaults);
NSUserDefaults.standardUserDefaults().synchronize();

Under Swift 1.2, I get the error...

Cannot invoke 'registerDefaults' with an argument list of type '(NSDictionary!)'

So, something has changed and Swift no-longer accepts an NSDictionary as a parameter to registerDefaults.

So, how can I convert my NSDictionary to a Dictionary object, given that they're no-longer interchangeable?

Upvotes: 2

Views: 889

Answers (2)

Paulw11
Paulw11

Reputation: 114875

You need to provide a type cast from NSDictionary to a [NSObject:AnyObject] -

use

let prefs = NSBundle.mainBundle().pathForResource("UserDefaults", ofType: "plist");
let dict = NSDictionary(contentsOfFile: prefs!);
let defaults:NSDictionary! = dict?.valueForKey("defaults") as! NSDictionary
NSUserDefaults.standardUserDefaults().registerDefaults(defaults as [NSObject : AnyObject]);
NSUserDefaults.standardUserDefaults().synchronize();

Upvotes: 5

iAnurag
iAnurag

Reputation: 9346

The user defaults can store NSDictionary objects. These are mapped to Swift as [NSObject : AnyObject]:

Try this:

NSUserDefaults.standardUserDefaults().setObject(defaults, forKey: "defaults")
var isOk = NSUserDefaults.standardUserDefaults().synchronize();

Upvotes: 0

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