Check user settings for push notification in Swift

Question

I have push notifications in my app. Whenever the app is launched, I would like to check whether the user has enabled push notification for my application.

I do it this way :

let notificationType = UIApplication.sharedApplication().currentUserNotificationSettings()!.types
if notificationType == UIUserNotificationType.None {
    print("OFF")
} else {
    print("ON")
}

If push notifications are disabled by the user, is there any way to activate this from my app?

Or is there any alternative to send user to the push notification settings (Settings - Notifications - AppName)?

Answer 1

There is no way to change settings from the app. But you can lead user to application specific system settings using this code.

extension UIApplication {
    class func openAppSettings() {
        UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!)
    }
}

Updated for Swift 3.0

extension UIApplication {
    class func openAppSettings() {
        UIApplication.shared.openURL(URL(string: UIApplicationOpenSettingsURLString)!)
    }
}

Updated for iOS 10+ & Swift 5+

extension UIApplication {
    @objc class func openAppSettings() {
        shared.open(URL(string: openSettingsURLString)!,
                    options: [:],
                    completionHandler: nil)
    }
}

Answer 2

For iOS 10 or higher

Checking if push notifications have been enabled for your app has changed dramatically for Swift 3. Use this instead of the above examples if you are using Swift 3.

    let center = UNUserNotificationCenter.current()
    center.getNotificationSettings { (settings) in
        if(settings.authorizationStatus == .authorized)
        {
            print("Push authorized")
        }
        else
        {
            print("Push not authorized")
        }
    }

Here is Apple's documentation on how to further refine your check: https://developer.apple.com/reference/usernotifications/unnotificationsettings/1648391-authorizationstatus