delegatesswiftdelegation

Delegates in swift?

How does one go about making a delegate, i.e. NSUserNotificationCenterDelegate in swift?

Solution

  • It is not that different from obj-c. First, you have to specify the protocol in your class declaration, like following:

    class MyClass: NSUserNotificationCenterDelegate

    The implementation will look like following:

    // NSUserNotificationCenterDelegate implementation
func userNotificationCenter(center: NSUserNotificationCenter, didDeliverNotification notification: NSUserNotification) {
    //implementation
}

func userNotificationCenter(center: NSUserNotificationCenter, didActivateNotification notification: NSUserNotification) {
    //implementation
}

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

    Of course, you have to set the delegate. For example:

    NSUserNotificationCenter.defaultUserNotificationCenter().delegate = self;