Swift NSUserNotification doesn't show while app is active

Question

I am new to OSX development and I am making an app which fires a notification when something happens. But it isn't showing the notification when the app is the key app, as it is the default behavior. I want to show them even when the app IS the key app. However I only found solutions to this matter that were written in objective-c but right now I am working with Swift. I was wondering how I could I implement it with Swift.

Hercegovina

Did you set your application delegate as the NSUserNotificationCenterDelegate? – Sick

I did not. I saw you needed to do that. But how can I make the further steps? – Hercegovina

Answer 1

To ensure the notifications are always shown you'll need to set a delegate for NSUserNotificationCenter and implement userNotificationCenter(center:shouldPresentNotification:) -> Bool. The documentation says this message is

Sent to the delegate when the user notification center has decided not to present your notification.

You can implement the delegate in any class of your choosing. Here is an example:

class AppDelegate: NSObject, NSApplicationDelegate, NSUserNotificationCenterDelegate {

    func applicationDidFinishLaunching(aNotification: NSNotification) {
        NSUserNotificationCenter.defaultUserNotificationCenter().delegate = self
    }

    func userNotificationCenter(center: NSUserNotificationCenter, shouldPresentNotification notification: NSUserNotification) -> Bool {
        return true
    }

Sick

This did the trick! Thanks! So the arrow is like a return type? Like I said, I am new to OSX and Swift development, I am trying to learn. – Hercegovina

Yes, -> indicates the return type of a function. – Sick

Ah, I see. I am more used to C# and PHP so it is challenging learn swift. Thanks for your help. – Hercegovina

I got it working by using an extension: (swift 3) gist.github.com/eonist/903e46b811c5eeeef84da2015c567b1b – Thorlie