Adding Action to Notifications on WatchOS with SwiftUI And WatchKit App Delegate

In previous article, we find out how to show a dynamic notification, In this article we want to add response to our local notifications.

Set Up Local Notifications:

First of all, we should set local notifications, I use my previous project, where we want to set notification category we should add actions to notification:

import SwiftUI
import UserNotifications
struct ContentView: View {
var body: some View {
VStack
{
Button("Request permission")
{
UNUserNotificationCenter.current().requestAuthorization(options: [.alert,.sound,.badge]) { (success, error) in
if success{
print("All set")
} else if let error = error {
print(error.localizedDescription)
}
}
}
Button("Schedule Notification")
{
let content = UNMutableNotificationContent()
content.title = "Drink some milk!"
content.subtitle = "you have 10 sec"
content.sound = .default
content.categoryIdentifier = "myCategory"
let doneAction = UNNotificationAction(identifier: "done", title: "Done", options: .foreground)
let laterAction = UNNotificationAction(identifier: "later", title: "Later", options: .destructive)
let category = UNNotificationCategory(identifier: "myCategory", actions: [doneAction,laterAction], intentIdentifiers: [], options: [])
UNUserNotificationCenter.current().setNotificationCategories([category])
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)
let request = UNNotificationRequest(identifier: "milk", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { (error) in
if let error = error{
print(error.localizedDescription)
}else{
print("scheduled successfully")
}
}
}
}
}
}

Perfect! now we can see our actions right below the notification view:

but now when users tap on actions, app opens automatically, how we can find out which action user tapped? To find out:

1. Open “ExtensionDelegate”.
2. Import “UserNotifications” .
3. Make ExtensionDelegate subclass of “UNUserNotificationCenterDelegate” .
4. Add “didReceive response” function to ExtensionDelegate class.
5. To make “didReceive response” work you should set the delegate for “UNUserNotificationCenter” Like below:

func applicationDidFinishLaunching() {
// Perform any final initialization of your application.
let center = UNUserNotificationCenter.current()
center.delegate = self
}

finished! now we can find out the action that user has been selected.