Local notifications swift 3
I am trying to send a notification on a button click. This is the code in my viewController:
@IBAction func getNotificationButtonPressed(_ sender: Any) {
let content = UNMutableNotificationContent()
content.title = "Title"
content.body = "Body"
content.categoryIdentifier = "ident"
content.sound = UNNotificationSound.default()
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 0.1, repeats: false)
let request = UNNotificationRequest(identifier: "ident", content: content, trigger: trigger)
let center = UNUserNotificationCenter.current()
center.add(request) { (error : Error?) in
if let theError = error {
print(theError.localizedDescription)
} else {
print ("success")
}
}
}
also in AppDelegate I asked for permission to use Notifications:
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options:[.badge, .alert, .sound]) { (granted, error) in
// Enable or disable features based on authorization.
}
application.registerForRemoteNotifications()
PS I imported
import UserNotifications
in both AppDelegate and custom ViewController.
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1 answer
When you create a notification for this check
if #available(iOS 10.0, *) {
let content = UNMutableNotificationContent()
content.title = "Intro to Notifications"
content.subtitle = "Lets code,Talk is cheap"
content.body = "Sample code from WWDC"
content.sound = UNNotificationSound.default()
// Deliver the notification in five seconds.
let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 5.0, repeats: false)
let request = UNNotificationRequest(identifier:requestIdentifier, content: content, trigger: trigger)
UNUserNotificationCenter.current().delegate = self
UNUserNotificationCenter.current().add(request){(error) in
if (error != nil){
print(error?.localizedDescription)
}
}
}
Implement this UNUserNotification delegate method to trigger a notification.
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
print("Tapped in notification")
}
//This is key callback to present notification while the app is in foreground
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
print("Notification being triggered")
//You can either present alert ,sound or increase badge while the app is in foreground too with ios 10
//to distinguish between notifications
if notification.request.identifier == requestIdentifier{
completionHandler( [.alert,.sound,.badge])
}
}
Happy coding.
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