I have a GPS app that registers to run in the background. I also show a UILocalNotification when I have finished a process. This correctly shows, and if the app is open, then it also appears in Notification Center (swipe down from top). But, if I call the UILocalNotification when my app is in the background, or the screen is locked, I DO get the notification, but it does NOT show up in Notification Center.
I am correctly registering for notifications in my app delegate (iOS 5 bug workaround):
// Register for notifications
[[UIApplication sharedApplication]registerForRemoteNotificationTypes:
UIRemoteNotificationTypeBadge |
UIRemoteNotificationTypeAlert |
UIRemoteNotificationTypeSound];
Calling the notification:
UILocalNotification *localNotif = [[UILocalNotification alloc] init];
localNotif.alertBody = msg;
localNotif.alertAction = NSLocalizedString(#"View", nil);
localNotif.soundName = #"alert.caf";
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:1];
[[UIApplication sharedApplication] presentLocalNotificationNow:localNotif];
[localNotif release];
Is this a bug? Why would it show up in Notification Center only when my app is open, even though the notification is shown to the user, and not other times?
Are you also using push notifications? I believe there is no need to call registerForRemoteNotificationTypes: if you are only using local.
Check Here
From the look of the code you posted, it does not look like the code would run in the background. It looks like you are trying to present a Local Notification when an even occurs in the background. You can not do this. Local Notifications are meant to be scheduled while the app is running to go off at a later time when the app is not running, and then they will trigger even when the app is closed.
You need to use Push Notifications. Check out Apple's documentation here.
EDIT: Is your app enabled for the notification center in settings?
have you added the UIBackgroundModes key to your Info.plist file ?
You need to have the UIBackgroundModes Key set to location.
Related
I want to cancel all local notifications when app deleted from background, not from Device.
I know this is
[[UIApplication sharedApplication] cancelAllLocalNotifications];
but my Question is where should i pass it to fire event when application terminates from background.
I called inside applicationWillTerminateFromBackground but it is not working.
You could simply check to see if the app is in the background, and if it is, not fire the notifications.
Similar to this question: How do I access remote push notification data on applicationDidBecomeActive?
But the different is how can you access the notification data when you are inapplicationDidBecomeActive and if you have clicked on the app icon instead of the push notification.
The flow is: If you click on the push notification then didReceiveRemoteNotification will be triggered, but if you click on the original app icon, only applicationDidBecomeActive will be triggered and didReceiveRemoteNotification will not be called.
I am looking for the later case so how can I access the push notification data.
(Both case assuming the app is in background and not killed yet.)
You can't get remote push payload by launching app from homescreen.
If the push data is important for app use, load it from your server after app launched.
#fannheyward answer is absolutely correct. You cannot get payload when application is launched by tapping app icon.
I have an idea, what if you get to know that some notification is pending when app is launched by tapping app icon. With this knowledge your app can fetch payload from your server.
You can set "Badge" in every such notification and on applicationDidBecomeActive you can check [application applicationIconBadgeNumber] > 0 to know that some notification is active. After fetching payload from your server you can set it to 0 like below
[UIApplication sharedApplication] setApplicationIconBadgeNumber:1];
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];
Please note: This means your app will have badge displayed over it when notification is received. I am not sure of the behaviour when badge is disabled by user from settings.
If your application target is over iOS7, you can do only if application is alive in backgroud.
In the capabilities settings at Xcode, you should enable Background Modes>Remote notifications, and write below code.
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
// save userInfo in NSUserDefaults
completionHandler( UIBackgroundFetchResultNoData );
}
If you want to test it, it will be helpful to use https://github.com/acoomans/SimulatorRemoteNotifications
From the server side, make sure to set content-available property with a value of 1
For this to work I also had to check the background fetch box.
You should get the notification in the launchWithOptions method in your appDelegate something like this:
NSDictionary *remoteNotif = [launchOptions objectForKey: UIApplicationLaunchOptionsRemoteNotificationKey];
if(remoteNotif != nil){
//Handle your notification
}
I have searched for this, and I can't find any documentation about doing these banner / notification / alerts... but I would really like to implement it.
In case my description in words is not clear, here is a picture of what I would like to do:
1:
I tried using this code:
UILocalNotification *note = [[UILocalNotification alloc] init];
[note setAlertBody:[NSString stringWithFormat:#"%# scanned", result]];
[note setAlertAction:#"New Scanned Image"];
[[UIApplication sharedApplication] presentLocalNotificationNow:note];
And it worked fine, such that it displayed the notification in the notifications center, but there was no banner alert.
So what are the classes that I use for this?
Thanks!
You can't define what type of alert to be used for your app's notifications. It can be set only by user through Notification Center settings.
Note! Alerts appear only when you app is closed or it is in background. If your app is active (it is in foreground), it will get only a notification (see - (void)applicationDidReceiveMemoryWarning: for details).
I'm using Urban Airship to send push notifications to my app
eg:
{"aps": {"badge": 2, "alert": "Part 2 of the August Issue is ready to download!", "sound": "default"}, "device_tokens": ["X"]}
The alert will display perfectly, however the app icon is never badged regardless of what I set "badge":# to...
Is my payload incorrect or is there extra code I'm supposed to add to my app to handle badges as well as alerts? Thanks!
EDIT:
I'm registering for push notifications like this:
// Register for notifications
[[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeNewsstandContentAvailability | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert)];
I was running with a similar problem. After a few minutes of checking around. I notice that there was a problem with my server side code. I found out that badge value has to be implicitly set as an integer to get the desired result. Hope that helps anyone reading this.
set the following code in the appdelegate .m file..
-(void)application:(UIApplication*)application didReceiveRemoteNotification:(NSDictionary*)userInfo
{
NSLog(#"Received notification: %#", userInfo);
//[self addMessageFromRemoteNotification:userInfo];
NSString* alertValue = [[userInfo valueForKey:#"aps"] valueForKey:#"badge"];
NSLog(#"my message-- %#",alertValue);
int badgeValue= [alertValue intValue];
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:badgeValue];
}
In iOS 5 there is a Settings -> Notifications. Double check that the Badge App Icon is turned on.
I assume that the app is not in the foreground when you were testing? It if is in the foreground then you have to handle badging manually.
I'm using ASIHTTPRequest to download multiple files while the iPhone app is running in the background. I want to present a UILocalNotification when the queue finishes.
The following delegate method isn't called until the app is resumed:
- (void)queueFinished:(ASINetworkQueue *)aQueue
{
NSLog(#"Queue finished");
if ([[UIApplication sharedApplication] applicationState] == UIApplicationStateBackground) {
UILocalNotification* localNotification = [[UILocalNotification alloc] init];
localNotification.alertBody = NSLocalizedString(#"All downloads completed");
[[UIApplication sharedApplication] presentLocalNotificationNow:localNotification];
[localNotification release];
}
}
So, how can I make this notification appear?
The reason your delegate isn't getting called is likely because your app is suspended in the background. If you are doing some sort of lengthy network process that continues after the user closes the app, you can use -[UIApplication beginBackgroundTaskWithExpirationHandler:] when you start the network tasks so that your application continues running in the background until you're done with the network tasks. However, it can still expire so you're not guaranteed to get enough time to finish.
From previous SO question notification when program is in background iOS 4
You do realize that when your app is in a suspended state, you won't receive any notifications -- and this is right in the documentation. There are only 3 classes of applications that can receive notifications: Audio applications (like iPod and analogues), location based applications, and voip apps. Your plist has to be set up correctly if your app is one of those applications.
Use this:
UILocalNotification *localNot = [[UILocalNotification alloc] init];
localNot.alertBody = #"Your Text";
localNot.alertAction = #"Name on the button";
localNot.fireDate = [NSDate date];
localNot.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNot];
What you're doing:
Create the LocalNotification
Add the body of your LN
Add the name of the button which appears on the "alert"
Set the fireDate to the actual date and time (maybe you need to increase the actual date with 1 or 2 seconds - for this use: dateByAddingTimeInterval:)
Set the soundName (you could also use a custom sound...)
Schedule / Create the LN
Do you have your queue maxConcurrentOperationCount set to 1?
The method setShouldContinueWhenAppEntersBackground:YES is set on a per request basis, and since you have a bunch of ASIHTTPRequest's inside a queue, only one of them may be executing at a time. This means that the other items in your queue haven't even started when you suspend the app, so the OS doesn't know yet to keep that network request alive.
I'm not sure of a solution, but I think this is the reason for what you're seeing.