I scheduled a local notification that should be activated after several hours without the user using the app. The problem I am having is that once it fires, the notification is repeated constantly until the app goes on the foreground. I would like for it to appear once only.
func applicationDidEnterBackground(application: UIApplication) {
localNotification.fireDate = NSDate(timeIntervalSinceNow: (86400)*3)
localNotification.alertTitle = "Te Extrañamos"
localNotification.alertBody = "No olvides tu estudio en Momentos de Tora"
localNotification.timeZone = NSTimeZone.defaultTimeZone()
localNotification.applicationIconBadgeNumber = UIApplication.sharedApplication().applicationIconBadgeNumber + 1
UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
UIApplication.sharedApplication().cancelLocalNotification(localNotification)
UIApplication.sharedApplication().applicationIconBadgeNumber = 0
}
Thanks in advance for your help.
All you need to do is keep track of you have sent the notification yet. Save a variable like let sentNotification: bool = false in your method before you send the notification check this variable. Then inside that check set it to true. In the applicationDidEnterForground method set it to false. So it will fire again when the parameters are reached. 🐼
Related
I want to receive a local notification in my app (swift) when I'm not connected to Internet and I have some information registered in my Local Data base.
Is it possible to do that please?
Local Notification doesnot requires internet.
About Local Notification from apple developer site
Local notifications give you a way to alert the user at times when your app might not be running. You schedule local notifications at a time when your app is running either in the foreground or background. After scheduling a notification, the system takes on the responsibility of delivering the notification to the user at the appropriate time. Your app does not need to be running for the system to deliver the notification.
For more info check this link. You can also check this link for tutorial.
do like this :
public func presentNotification(_ notifAction: String, notifBody: String) {
let application = UIApplication.shared
let applicationState = application.applicationState
if applicationState == UIApplicationState.background {
let localNotification = UILocalNotification()
localNotification.alertBody = notifBody
localNotification.alertAction = notifAction
localNotification.soundName = UILocalNotificationDefaultSoundName
localNotification.applicationIconBadgeNumber += 1
application.presentLocalNotificationNow(localNotification)
}
}
UIApplicationState has these states :
case active
case inactive
case background
I am working on alarm application, i need to schedule alarm on specific time, I use scheduleLocalNotification for scheduling alarms and it's working fine as i want. BUT I need to run to a request to my API server before triggering alarm. In that request I want to check some parameters returning from API server, If that satisfies some condition.
If any one have a method that run on a particular date - time in swift
Please help me for that
func addAlarm (newAlarm: Alarm) {
// Create persistent dictionary of data
var alarmDictionary = NSUserDefaults.standardUserDefaults().dictionaryForKey(ALARMS_KEY) ?? Dictionary()
// Copy alarm object into persistent data
alarmDictionary[newAlarm.UUID] = newAlarm.toDictionary()
// Save or overwrite data
NSUserDefaults.standardUserDefaults().setObject(alarmDictionary, forKey: ALARMS_KEY)
scheduleNotification(newAlarm, category: "ALARM_CATEGORY")
scheduleNotification(newAlarm, category: "FOLLOWUP_CATEGORY")
}
/* NOTIFICATION FUNCTIONS */
func scheduleNotification (alarm: Alarm, category: String) {
let notification = UILocalNotification()
notification.category = category
notification.repeatInterval = NSCalendarUnit.Day
switch category {
case "ALARM_CATEGORY":
notification.userInfo = ["UUID": alarm.UUID]
notification.alertBody = "Time to wake up!"
notification.fireDate = alarm.wakeup
notification.timeZone = NSTimeZone.localTimeZone()
notification.soundName = "loud_alarm.caf"
break
case "FOLLOWUP_CATEGORY":
notification.userInfo = ["UUID": alarm.followupID]
notification.alertBody = "Did you arrive yet?"
notification.fireDate = alarm.arrival
notification.timeZone = NSTimeZone.localTimeZone()
notification.soundName = UILocalNotificationDefaultSoundName
break
default:
print("ERROR SCHEDULING NOTIFICATION")
return
}
print("Notification=\(notification)")
// For debugging purposes
if alarm.isActive {
UIApplication.sharedApplication().scheduleLocalNotification(notification)
}
}
Waking up an app through a local notification is not possible, this is available only for remote notifications. According to the Notification Programming Guide:
When a remote notification arrives, the system handles user
interactions normally when the app is in the background. It also
delivers the notification payload to the
application:didReceiveRemoteNotification:fetchCompletionHandler:
method of the app delegate in iOS and tvOS
But there is still a catch; even then it is not guaranteed that the app will be launched since, according to didReceiveRemoteNotification:fetchCompletionHandler: documentation:
However, the system does not automatically launch your app if the user
has force-quit it. In that situation, the user must relaunch your app
or restart the device before the system attempts to launch your app
automatically again.
I don't think there is a guaranteed way to schedule a block for execution in some later moment, independently from the state of the app at that time. Depending on your specific requirements and frequency, you could perhaps register for the fetch background mode and implement application:performFetchWithCompletionHandler: to opportunistically fetch and validate server data. Last note: make sure that you are a responsible background app (from my experience Apple takes this requirement seriously)
I am scheduling timer and sending some local notification for user about some data, example is - if there is some store near.
func configureNotification(shop: Shop) {
let notification = UILocalNotification()
notification.fireDate = NSDate(timeIntervalSinceNow: 0)
notification.alertBody = "There is a store \(shop.name) near!"//Localized().near_shop_string + shopName
notification.alertAction = "Swipe to see offer!"//Localized().swipe_to_see_string
notification.soundName = UILocalNotificationDefaultSoundName
UIApplication.sharedApplication().scheduleLocalNotification(notification)
}
When app running in background if there is some store near users coordinates, there is a local notification.
For example, there is three local notification received about different stores and user swipes the second one and make app active from it.
The question is, to recognize from what specific notification applicationDidBecomeActive was launched, some launcOptions, as for push notifications from server? Any solutions?
You need handle it in didReceiveLocalNotification delegate method
func application(application: UIApplication!, didReceiveLocalNotification notification: UILocalNotification!) {
// do your jobs here
}
notification param will contain info for every notification.
Also launchOptions has a key UIApplicationLaunchOptionsLocalNotificationKey that contains notification.
You can get it like
let localNotification:UILocalNotification = launchOptions.objectForKey(UIApplicationLaunchOptionsLocalNotificationKey)
I am currently making an app which counts the steps walked and check with goal and release local notification if met.
I have set up the local notification but I want that to trigger just once at that moment. I got this working through dispatch_once_t:
if stepsData >= stepsGoalData {
let localNotification = UILocalNotification()
UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
localNotification.fireDate = NSDate()
localNotification.alertBody = "Acheived"
localNotification.soundName = UILocalNotificationDefaultSoundName
}
But in case if the user increases the stepsGoalData, currently the code doesn't trigger the notification. Can someone please provide me with an idea to handle this case. Thank you!
So, you should really just change the check for wether to notify or not so that it considers not just the count but also a flag to indicate if the notification has been made. This can be a var defined beside your stepsGoalData as a simple Bool.
Now, your check would be:
if stepsData >= stepsGoalData && !hasNotified {
hasNotified = true
...
And when you set the stepsGoalData to a new target value you also set hasNotified = false.
I believe I am using cancelLocalNotification improperly.
I have a recurring notification that runs conditionally, which was created using the following code:
let localNotification: UILocalNotification = UILocalNotification()
localNotification.alertAction = "Inactive Membership"
localNotification.alertBody = "Our system has detected that your membership is inactive..."
localNotification.fireDate = NSDate(timeIntervalSinceNow: 5)
localNotification.repeatInterval = .Minute
UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
This notification successfully runs every single minute (for testing purposes). Obviously, I'd like a way to conditionally remove these notifications, so I've tried to use cancelLocalNotification to do so.
How I think cancelLocalNotification works
My intuition is that cancelLocalNotification will remove all the notifications for that specific notification object. Here's how I'm using it.
UIApplication.sharedApplication().cancelLocalNotification(localNotification)
What actually happens
I've stepped through my function and verified that the cancelLocalNotification code does get called. However, I keep getting my notification every minute.
My Question
How do I properly cancel a UILocalNotification that has been scheduled?
Full code:
static func evaluateMemberStatusNotifications() {
let userDefaults = Global.app.userDefaults
let localNotification: UILocalNotification = UILocalNotification()
print("evaluating profile notifications")
// is the user active? if so no notification
let isActive : Bool = userDefaults.valueForKey("ActiveMember") as! Bool // false == inactive
print("is the user active?")
if !isActive {
print("user is not active, checking if notification code has run")
// if userDefaults is nil for this value, we'll set it to false
if (userDefaults.valueForKey("ProfileNotificationHasRun") == nil) {
print("nil! setting ProfileNotificationHasRun to 'false'")
userDefaults.setValue(false, forKey: "ProfileNotificationHasRun")
}
let statusNotification = userDefaults.valueForKey("ProfileNotificationHasRun") as! Bool
// has this code been run? If not run it
if !statusNotification {
print("running notification code")
// we schedule a notification
localNotification.alertAction = "Inactive Membership"
localNotification.alertBody = "Our system has detected that your membership is inactive."
localNotification.fireDate = NSDate(timeIntervalSinceNow: 5)
localNotification.category = "status"
localNotification.repeatInterval = .Day
UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
userDefaults.setValue(true, forKey: "ProfileNotificationHasRun")
} else {
print("notification code has already run, time interval has been set")
}
} else {
print("member is active, remove Inactive notification")
// if the member is active, we remove the notification so the user doesn't
// keep getting notified
UIApplication.sharedApplication().cancelLocalNotification(localNotification)
userDefaults.setValue(false, forKey: "ProfileNotificationHasRun")
}
}
You're creating a new UILocalNotification (line 3 of your gist) and then cancelling it. That new notification was never scheduled. You need to get the existing, scheduled notification object and cancel that.
You can access your existing, scheduled notifications through the UIApplication.sharedApplication().scheduledLocalNotifications array.
Or you could just cancel all scheduled local notifications by calling UIApplication.sharedApplication().cancelAllLocalNotifications().
UPDATE
Each call to evaluateMemberStatusNotifications creates a new instance of UILocalNotification, then (depending on the ActiveMember value) either configures and schedules that new notification, or tries to delete the new (unscheduled) notification.
Instead, you should just create a new notification in the !isActive branch where you want to schedule it.
In the other branch, you need to find the existing notification in the scheduledLocalNotifications array and (if you find it) cancel that existing notification.
Since you say you have other notifications that you don't want to mess with, you should use the userInfo property of the notification to identify it. For example, when configuring the notification before scheduling it:
localNotification.alertAction = "Inactive Membership"
localNotification.alertBody = "Our system has detected that your membership is inactive. You may continue using this application though some features may not be available to you until your membership is reinstated."
localNotification.fireDate = NSDate(timeIntervalSinceNow: 5)
localNotification.category = "status"
localNotification.repeatInterval = .Day
// *** NEW
localNotification.userInfo = [ "cause": "inactiveMembership"]
And when you want to cancel the existing notification:
let maybeNotification = UIApplication.sharedApplication().scheduledLocalNotifications?.filter({ (notification: UILocalNotification) -> Bool in
notification.userInfo?["cause"] as? String == "inactiveMembership"
}).first
if let notification = maybeNotification {
UIApplication.sharedApplication().cancelLocalNotification(notification)
}