Error when trying to save array using NSUserDefaults()

Question

I am trying to save an array using NSUserDefaults() so that I can access the data even after closing the program. I Have always managed to use it successfully in the past saving Ints and Strings. However when I try to save an array it doesn't work. Here is an example:

 var superarray = [AnyObject?]()
    superarray.append("Test")
    superarray.append(3)
    superarray.append(NSDate()) //random examples

NSUserDefaults.standardUserDefaults().setObject(superarray, forKey: "AnyKey")

It gives the error: "Cannot convert value of type '[AnyObject?]' to expected argument type 'AnyObject?' "

Does this mean that .setObject() cannot take arrays? Is there another alternative?

Thanks in advance!

Lory Huz · Accepted Answer · 2015-12-17 21:44:49Z

1

NSUserDefaults can only store object with property list type.

Reminder, plist are limited to these objects:

NSData
NSString
NSNumber
NSDate
NSArray
NSDictionary

Se here you could use NSMutableArray instead of your mutable Array

let superarray = NSMutableArray();
superarray.addObject("Test")
superarray.addObject(3)
superarray.addObject(NSDate())

NSUserDefaults.standardUserDefaults().setObject(superarray, forKey: "AnyKey")

More details here: http://www.codingexplorer.com/nsuserdefaults-a-swift-introduction/

answered Dec 17, 2015 at 21:44

Lory Huz

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