How to pass arguments to the selector in NSNotificationCenter?

Question

This code checks when the app becomes active and runs a specific method dataMain(). I added a argument to dataMain(productCode: String).

NSNotificationCenter.defaultCenter().addObserver(
            self,
            selector: "dataMain",
            name: UIApplicationDidBecomeActiveNotification,
            object: nil)

Is there any way I can pass the productCode argument to the selector?

Answer 1

If you have the productCode variable at the time of registering for this notification, then you could use a different notification observing method.

let productCode = "A string"

NSNotificationCenter.defaultCenter().addObserverForName(UIApplicationDidBecomeActiveNotification,
    object: nil,
    queue: NSOperationQueue.mainQueue()) { (notification) -> Void in
        self.dataMain(productCode)
}