CODEWITHSUNDEEP
swiftapple-push-notificationsuilocalnotificationunusernotificationcenter
mfaani
mfaani

Reputation: 36287

where is the none case used in notifications?

let types: UIUserNotificationType = [.alert, .sound, .badge, .none]
let settings = UIUserNotificationSettings(forTypes: types, categories: nil)
application.registerUserNotificationSettings(settings)

or this code:

guard let settings = UIApplication.sharedApplication().currentUserNotificationSettings() where settings.types != .None else {}

not sure how to make sense of it, obviously if you register for it, then you would have it among your settings types...

I've read here and here but can't figure it out. Couldn't find documentation on it either. Though, when I Command + Click on it says:

the application may not present any UI upon a notification being received

Is it used to signify that once the notification is received the user can do nothing? How is that something that we should register for?! What can go wrong if we don't register for this?

Upvotes: 0

Views: 202

Answers (1)

matt
matt

Reputation: 535057

.none is merely the zero option — neither .alert nor .sound nor .badge. It is not an option so much as an absence of any of the options.

You wouldn't need to write code to register for .none, obviously. But the user might configure things that way in Settings, completely turning off the ability for notifications to present alerts, add badges, or play sounds, and you need a way to be told this and to check for it.

Note, by the way, that .none (the zero option) is not imported by name in Swift 3; it corresponds merely to the empty set []. (And in any case UIUserNotificationType is deprecated in iOS 10.)

Upvotes: 1

Related Questions