CODEWITHSUNDEEP
iosswiftnotificationcenter
rharding
rharding

Reputation: 571

Swift NotificationCenter passing userInfo to observing view controller

I'm trying to pass userInfo from an object to an observing view controller. For some reason it keeps crashing. Here's the code:

Observer:

NotificationCenter.default.addObserver(
        self,
        selector: #selector(self.alarmFired(_:)),
        name: Notification.Name(rawValue: "AlarmFiringNotification"),
        object: nil)

Receiving function:

@objc func alarmFired(_ notification: UNNotification) {
    let userInfo = notification.request.content.userInfo
    let title = userInfo["title"] as? String
    let body = userInfo["body"] as? String
    let alert = UIAlertController(title: title, message: body, preferredStyle: .alert)
    let okAction = UIAlertAction(title: "OK", style: .default, handler: nil)
    alert.addAction(okAction)
}

Notification broadcasting:

public static func broadcastAlarmFiringNotification(with userInfo: [String: Any]) {
    NotificationCenter.default.post(Notification(name: Notification.Name(rawValue: "AlarmFiringNotification"), object: self, userInfo: userInfo))
}

Broadcasting call:

NotificationBroadcaster.broadcastAlarmFiringNotification(with: ["title": title, "body": body])

But it keeps crashing with this output:

2018-03-14 18:51:06.743621-0400 App[33718:871608] -[NSConcreteNotification request]: unrecognized selector sent to instance 0x60c00005c860

2018-03-14 18:51:06.754868-0400 App[33718:871608] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSConcreteNotification request]: unrecognized selector sent to instance 0x60c00005c860'

It crashes on the notification broadcasting (NotificationCenter.default.post...)

I'm really confused, any help is appreciated!

Upvotes: 0

Views: 804

Answers (1)

picciano
picciano

Reputation: 22701

The UNNotification class is not what you want here. Change the signature to:

@objc func alarmFired(notification: Notification) {
    let userInfo = notification.userInfo

Upvotes: 1

Related Questions