There are a few articles that address this same problem, but (from what I've seen) they're all from 4 years ago and in Objective-C. I'm working with Swift 4.2.
I'm making a countdown timer app. While the app is in the background and a timer expires, I want the notification sound to keep playing until the user stops it by tapping on the notification.
So far, what I have only plays an alert sound once from the background/lockscreen.
Here is the method I am working with.
func notifications(title: String, message: String){
center.delegate = self
let restartAction = UNNotificationAction(identifier: "RESTART_ACTION", title: "Restart timer", options: UNNotificationActionOptions(rawValue: 0))
let stopAction = UNNotificationAction(identifier: "STOP_ACTION", title: "Stop", options: UNNotificationActionOptions(rawValue: 0))
let expiredCategory = UNNotificationCategory(identifier: "TIMER_EXPIRED", actions: [restartAction, stopAction], intentIdentifiers: [], options: UNNotificationCategoryOptions(rawValue: 0))
// Register the notification categories.
center.setNotificationCategories([expiredCategory])
let content = UNMutableNotificationContent()
content.title = title
content.body = message
content.categoryIdentifier = "TIMER_EXPIRED"
content.sound = UNNotificationSound(named:UNNotificationSoundName(rawValue: _currentTimer.getSoundEffect+".mp3"))
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: TimeInterval(_currentTimer.endTime), repeats: false)
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
center.add(request) { (error : Error?) in
if let theError = error {
print(theError.localizedDescription)
}
}
}
So, the answer I'm going settling on with this question is that there is no answer. Apple does not want third party developers playing notification sounds for longer than 30 seconds in any circumstance, even if it is to build a timer app. Their timer in the Clock app will go off until you silence it, but third party developers aren't allowed to do that.
Related
Actions fail to show.
And, they also fail to show with these downloaded notification demo apps
- LocalNotifications by Bart Jacobs
- RemindMe by Keith Harrison (Use Your Loaf)
- EatMoreVegetable by Brian Advent
Interestingly, I can make action button appear by doing this:
Step
1) In app, fire notification request
2) Leave app - go to Home screen
3) Notification appears without action button
4) Drag notification down causes action button to appear
Same results with simulator or device.
My demo app can be downloaded from here
https://github.com/tricarb/UNLocalDemo
func registerCategories() {
let center = UNUserNotificationCenter.current()
let actionID = Notify.actionID.rawValue
let categoryID = Notify.categoryId.rawValue
let action = UNNotificationAction(identifier: actionID, title: "Action Title", options: [.foreground])
let category = UNNotificationCategory(identifier: categoryID, actions: [action], intentIdentifiers: [])
center.setNotificationCategories([category])
}
func fireNotification() {
let content = UNMutableNotificationContent()
content.title = "Content Title"
content.body = "This is the content body"
content.categoryIdentifier = Notify.categoryId.rawValue
let timeInterval = TimeInterval(7)
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInterval, repeats: false)
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
let center = UNUserNotificationCenter.current()
center.add(request) { (error) in
if let error = error {
print(error.localizedDescription)
} else {
print("Notification will fire in", timeInterval, "seconds")
}
}
}
To get action button to show you need to swipe the notification to the left (in notification center). There you'll see three buttons: "Manage", "View", "Clear".
Select "View" and you'll get the same behavior as you have when you drag down the notification that just appeared.
In my app, I'm fetching the content of camera-roll with fetchAssets(with:). To receive change messages, I've registered my observer with the photo library’s register(_:) method. My observer is comforting to the PHPhotoLibraryChangeObserver protocol. So when the library is changing, I should get notified about that. The scenario I want to support is while I'm running my app, I go to background, then open the camera app, take a picture, then go back to my app. Is it possible to get the notification of a change that occurred while my app was in background, when it comes back to foreground?
Yes you can create LocalNotificaion and trigger it when app is going in background and coming back in foreground.
func scheduleNotification(timeInter : TimeInterval) {
let content = UNMutableNotificationContent()
let userActions = "User Actions"
content.title = "Title "
content.body = "Body"
content.sound = UNNotificationSound.init(named:
content.categoryIdentifier = userActions
content.userInfo = ["MID" : RANDOM_ID, "timeInterval" : String(timeInter)]
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInter, repeats: false)
let identifier = String(timeInter)
let request = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)
print(request.identifier)
notificationCenter.add(request) { (error) in
if let error = error {
}
}
// let snoozeAction = UNNotificationAction(identifier: "Snooze", title: "Snooze", options: [])
let deleteAction = UNNotificationAction(identifier: "Delete", title: "Delete", options: [.destructive])
let category = UNNotificationCategory(identifier: userActions, actions: [deleteAction], intentIdentifiers: [], options: [])
notificationCenter.setNotificationCategories([category])
}
For a few months, I have been working on an app which uses local UNNotifications to achieve the grand goal. I coded this app using Swift 4, therefore aiming it towards distribution on the iOS App Store. As I was testing my app out, I noticed that after I clicked on one of the notification actions (which was not "cancel"), or if I just tapped on the notification in general, the app would open up (which is intended), but the notification would remain on the screen. Is there any possible way to remove the notification from the screen after already tapping on one of the actions programmatically? Below is the code where I schedule the notification:
let action1 = UNNotificationAction(identifier: "go", title: "Go", options: [.foreground])
let action2 = UNNotificationAction(identifier: "cancel", title: "Cancel", options: [.destructive])
let actionsCategory = UNNotificationCategory(identifier: "actions.category", actions: [action1, action2], intentIdentifiers: [], options: [])
UNUserNotificationCenter.current().setNotificationCategories([actionsCategory])
//Queue the notification alert
let content = UNMutableNotificationContent()
content.body = "Interesting day notification!"
content.sound = UNNotificationSound.default()
content.setValue(true, forKey: "shouldAlwaysAlertWhileAppIsForeground")
content.categoryIdentifier = "actions.category"
// if (pinNumber.text) != nil{
// }
content.userInfo = ["Name": namePerson.text ?? "", "Pin": Int(pinNumber.text ?? "") != nil ? pinNumber.text! : ""]
//trigger
let triggerDate = Calendar.current.dateComponents([.year,.month,.day,.hour,.minute], from: datePicker.date)
let trigger = UNCalendarNotificationTrigger(dateMatching: triggerDate, repeats: false)
//scheduling
let identifier = id // set same id as task
let request = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)
center.add(request, withCompletionHandler: {(error) in
if let error = error{
print(error)
}else{
print("saved alert")
}
})
I don't see anything in your code that would cause that behavior. This sounds to me like either an iOS bug, or there is something weird about the notification permissions/settings of the particular device (or simulator) for your app. Go into the notifications sections of the Settings app and see what the settings are for your app.
I'm making an app that used circular regions for geofences. When the phone is active or the app is open, the geofence notifications are working fine in both simulator and device (iPhone 6 running 10.3.1).
In the simulator it works fine; When the user enters a region, it wakes up, makes a sound and shows an alert on the lock screen.
On the phone, the "didEnterRegion" delegate calls are made when entering the region (I log some messages) but the phone is not making an alert and waking up. When I push the home button once, I can see the alert on the lock screen, but I want it to wake up and show the alert instantly - like when I get a message. It works in the simulator, so I wonder what could be wrong? It has worked for me a few times, where the alert was shown on both the phone and my watch, but 95% of the time it's not working - the notifications are generated but only visible if I manually wake up the phone.
How to fix this?
Here's the code I use for creating the local notification:
// https://blog.codecentric.de/en/2016/11/setup-ios-10-local-notification/
let location = CLLocation(latitude: item.coordinate.latitude, longitude: item.coordinate.longitude)
GeoTools.decodePosition(location: location) {
(address, city) in
let content = UNMutableNotificationContent()
content.title = "Camera nearby!"
content.subtitle = item.id
content.body = "\(address), \(city)"
content.categoryIdentifier = Constants.notificationCategoryId
content.sound = UNNotificationSound.default()
content.threadIdentifier = item.id
// FIXME make action for clicking notification
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 0.001, repeats: false) // FIXME HACK
let request = UNNotificationRequest(identifier: "camNotification", content: content, trigger: trigger)
let unc = UNUserNotificationCenter.current()
unc.removeAllPendingNotificationRequests()
unc.add(request, withCompletionHandler: { (error) in
if let error = error {
print(error)
}
else {
print("completed")
}
})
}
Here is some code that I just verified wakes the device when notification is presented:
let message = "CLRegion event"
// Show an alert if application is active:
if UIApplication.shared.applicationState == .active {
if let viewController = UIApplication.shared.keyWindow?.rootViewController {
showSimpleAlertWithTitle(nil, message: message, viewController: viewController)
}
}
else {
// Otherwise app is in background, present a local notification:
let content = UNMutableNotificationContent()
content.body = message
content.sound = UNNotificationSound.default()
content.categoryIdentifier = "message"
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1.0, repeats: false)
let request = UNNotificationRequest(identifier: "com.foobar", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
}
Really the only diff is that I don't call removeAllPendingNotifications() so if you must remove notifications I wonder if removePendingNotificationRequests(withIdentifiers identifiers: [String]) might be more precise?
I'm new to WatchKit development. I would like to display a message regardless of what app is currently being used or whether the watch is active or not, like how the built-in Timer app shows the label "Timer Done". The user should then be able to click an "OK" button and dismiss the message.
I have tried using both alerts and modal views, but showing them programmatically still requires my app to be active. Using the notifications system is not a viable solution because that would rely on an iPhone.
I've been stuck on this for many hours, any insight would be helpful, thanks.
You need to ask permission in your iOS App first:
UNUserNotificationCenter.current().requestAuthorization(options: [.alert,.badge,.sound])
{ (granted, error) in
if !granted
{
print("User did not give permissions to send notitications...")
}
}
Then in your watchOS App you can create a notification for some time in the future, make sure you give it a UUID (this may be a bug in watchOS3):
let content: UNMutableNotificationContent = UNMutableNotificationContent()
content.title = "Title"
content.subtitle = "Subtitle"
content.body = "message"
content.sound = UNNotificationSound.default()
content.categoryIdentifier = "aCategory"
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: duration, repeats: false)
let id: String = WatchNotify.getUUID()
let request = UNNotificationRequest.init(identifier: id,
content: content,
trigger: trigger)
UNUserNotificationCenter.current().add(request)
{
(error) in // ...
}
....
class func getUUID() -> String
{
let uuidObj = CFUUIDCreate(nil)
let uuidString = CFUUIDCreateString(nil, uuidObj)!
return uuidString as String
}