CODEWITHSUNDEEP
swift
Jason
Jason

Reputation: 1067

Property Observers on NSUserDefaults

I have a group of buttons, and when two buttons are pressed, then an NSUserDefault is triggered,but I need an observer in the ViewController to do some animation.

Is this possible in swift ? Could I use DidSet: and WillSet: or is there an other option ?

Upvotes: 1

Views: 1098

Answers (1)

Zell B.
Zell B.

Reputation: 10286

The easiest way to do that is to combine both user defaults and animations on a computed variable as follow:

var defaultName:String{
    get {

        var returnValue: NSString? = NSUserDefaults.standardUserDefaults().objectForKey("defaultName") as? NSString

        if returnValue == nil //Check for first run of app
        {
            returnValue = ""
        }
        return returnValue!
    }

    set (newValue) {
        NSUserDefaults.standardUserDefaults().setObject(newValue, forKey: "defaultName")
        NSUserDefaults.standardUserDefaults().synchronize()
        // start your animations here
    }
}

Next on button click just change the defaultName value so both newValue will be stored and animations will trigger

Upvotes: 6

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