UNNotificationAction buttons not showing,Why? - ios

Question

I refer the code from Apple, but not working, here's my code:
override func viewDidLoad() {
super.viewDidLoad()
let center = UNUserNotificationCenter.current()
center.delegate = self
center.requestAuthorization(options: [.alert,.sound]) { (granted, error) in
print(granted)
}
//Set content
let content = UNMutableNotificationContent()
content.title = "Hello World"
content.body = "My First Notification App"
content.sound = UNNotificationSound.default()
//Set trigger
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1, repeats: false)
//Set request
let uuid = UUID().uuidString
let request = UNNotificationRequest(identifier: uuid, content: content, trigger: trigger)
//Set actions
let blueAction = UNNotificationAction(identifier: "ACTION_BLUE", title: "Blue", options: .init(rawValue: 0))
let greenAction = UNNotificationAction(identifier: "ACTION_GREEN", title: "Green", options: .init(rawValue: 0))
let category = UNNotificationCategory(identifier: "COLOR_ACTION", actions: [blueAction,greenAction], intentIdentifiers: [], hiddenPreviewsBodyPlaceholder: "", options: .customDismissAction)
center.setNotificationCategories([category]) //category
center.add(request) { (err) in
if err != nil {
print(err)
}
}
// Do any additional setup after loading the view, typically from a nib.
}
here is UNUserNotificationCenterDelegate
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
if response.notification.request.content.categoryIdentifier == "COLOR_ACTION" {
}
completionHandler()
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert,.sound])
}
I think noting was wrong, but it isn't work. Hope someone could help me, I am really confused now lol.

Answer 1

You need add the content.categoryIdentifier = "COLOR_ACTION" before the call of UNNotificationRequest like the code below in swift.
//Set content
let content = UNMutableNotificationContent()
content.title = "Hello World"
content.body = "My First Notification App"
content.sound = UNNotificationSound.default()
content.categoryIdentifier = "COLOR_ACTION"
Here is the output when you drag the notification: