Save and retrieve value via KeyChain

Question

I\'m trying to store an Integer and retrieve it using KeyChain.

This is how I save it:

func SaveNumberOfImagesTaken()
    {
        let key = \"IMAGE         


        

Answer 1

You are storing a number, not a string, so you are getting back an NSNumber, not a string. The exception is pretty clear - you can't downcast an NSNumber to a String - you can use stringValue() to get the string representation of an NSNumber

if let op = dataTypeRef?.toOpaque() {
    let data = Unmanaged.fromOpaque(op).takeUnretainedValue()
    if let string: AnyObject? =  NSKeyedUnarchiver.unarchiveObjectWithData(data) as? AnyObject? {
        if key == "IMAGE_TAKEN"
        {
            return string.stringValue() as! String!
        }
        else if string == nil
        {
                return nil
        }
    }
}