UNUserNotificationCenter did receive response with completion handler is never called iOS10, swift 2.3

Request identifier is not the notification category.

Just add this line:

content.categoryIdentifier = identifier

Update:Just made a simple app. Everything seems to working fine:

class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {var window: UIWindow?func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {    UNUserNotificationCenter.current().delegate = self    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in        if granted {            self.registerCategory()            self.scheduleNotification(event: "test", interval: 3)            self.scheduleNotification(event: "test2", interval: 5)        }    }    return true}func registerCategory() -> Void{    let callNow = UNNotificationAction(identifier: "call", title: "Call now", options: [])    let clear = UNNotificationAction(identifier: "clear", title: "Clear", options: [])    let category : UNNotificationCategory = UNNotificationCategory.init(identifier: "CALLINNOTIFICATION", actions: [callNow, clear], intentIdentifiers: [], options: [])    let center = UNUserNotificationCenter.current()    center.setNotificationCategories([category])}func scheduleNotification (event : String, interval: TimeInterval) {    let content = UNMutableNotificationContent()    content.title = event    content.body = "body"    content.categoryIdentifier = "CALLINNOTIFICATION"    let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: interval, repeats: false)    let identifier = "id_"+event    let request = UNNotificationRequest.init(identifier: identifier, content: content, trigger: trigger)    let center = UNUserNotificationCenter.current()        center.add(request, withCompletionHandler: { (error) in    })}func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {    print("didReceive")    completionHandler()}func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {    print("willPresent")    completionHandler([.badge, .alert, .sound])}}

Update 2: Rewritten in Swift 2.3

class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {var window: UIWindow?func applicationDidFinishLaunching(application: UIApplication) {    UNUserNotificationCenter.currentNotificationCenter().delegate = self    UNUserNotificationCenter.currentNotificationCenter().requestAuthorizationWithOptions([.Badge, .Sound, .Alert]) { (granted, error) in        if granted {            self.registerCategory()            self.scheduleNotification("test", interval: 3)            self.scheduleNotification("test2", interval: 5)        }    }}func registerCategory() -> Void{    let callNow = UNNotificationAction(identifier: "call", title: "Call now", options: [])    let clear = UNNotificationAction(identifier: "clear", title: "Clear", options: [])    let category : UNNotificationCategory = UNNotificationCategory.init(identifier: "CALLINNOTIFICATION", actions: [callNow, clear], intentIdentifiers: [], options: [])    let center = UNUserNotificationCenter.currentNotificationCenter()    center.setNotificationCategories([category])}func scheduleNotification(event : String, interval: NSTimeInterval) {    let content = UNMutableNotificationContent()    content.title = event    content.body = "body"    content.categoryIdentifier = "CALLINNOTIFICATION"    let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: interval, repeats: false)    let identifier = "id_"+event    let request = UNNotificationRequest.init(identifier: identifier, content: content, trigger: trigger)    let center = UNUserNotificationCenter.currentNotificationCenter()    center.addNotificationRequest(request) { (error) in    }}func userNotificationCenter(center: UNUserNotificationCenter, willPresentNotification notification: UNNotification, withCompletionHandler completionHandler: (UNNotificationPresentationOptions) -> Void) {    print("willPresent")    completionHandler([.Badge, .Alert, .Sound])}func userNotificationCenter(center: UNUserNotificationCenter, didReceiveNotificationResponse response: UNNotificationResponse, withCompletionHandler completionHandler: () -> Void) {    print("didReceive")    completionHandler()}}

Use belwo delegate method for Swift 2.3:

func userNotificationCenter(center: UNUserNotificationCenter, didReceiveNotificationResponse response: UNNotificationResponse, withCompletionHandler completionHandler: () -> Void)

Make sure your AppDelegate implementing UNUserNotificationCenterDelegate protocol.

For Swift

let center = UNUserNotificationCenter.current()center.delegate = self

For Objective-c

//set delegate to self[[UNUserNotificationCenter currentNotificationCenter] setDelegate:self];

Assigning delegate to self will trigger following methods.

// App in foreground    private func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: (UNNotificationPresentationOptions) -> Void) {      print("willPresent")      }//On Action click     private func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: () -> Void) {      print("didReceive")      }