I am making an application in which i want features like as when i run my app on device then it will closed immediately without showing any screen.But Application works in background. When user click on icon of application then it will not show any screen but work in background. After 2 minutes gap it will show a alert message. How do that?
I have used code for this given below:-
-(void)applicationDidFinishLaunching:(UIApplication *)application{
[application cancelAllLocalNotifications];
[self applicationWillTerminate:application];}-(void)applicationWillTerminate:(UIApplication *)application{
/*
Called when the application is about to terminate.
Save data if appropriate.
See also applicationDidEnterBackground:.
*/
UILocalNotification* ln = [[UILocalNotification alloc] init];
ln.fireDate =[NSDate dateWithTimeIntervalSinceNow:30];
ln.alertBody = [NSString stringWithFormat:#"Now app is working in Background."];
ln.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:ln];
ln.hasAction=NO;
[ln release];
exit(0);}
But this is not working as i want. So what is bug in this code? How do that?
Thanks in advance...
You can't put your app away by manually calling [self applicationWillTerminate:application];. It's a delegate method that gets called when your application is about to be terminated, not a method to terminate the app.
You could try to schedule a local notification in didFinishLaunchingWithOptions: and call exit(0); afterwards. Some kind of splah screen (or black screen) will probably be shown for a moment.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
[application cancelAllLocalNotifications];
UILocalNotification* ln = [[UILocalNotification alloc] init];
ln.fireDate =[NSDate dateWithTimeIntervalSinceNow:30];
ln.alertBody = [NSString stringWithFormat:#"Now app is working in Background."];
ln.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:ln];
ln.hasAction=NO;
[ln release];
exit(0); //this line kills the app (and gets your app rejected)
return NO; //this line is just to make compiler happy
}
Please note that this will most definetly not be approved for App Store.
Related
I have this code to schedule a UILocalNotification:
UILocalNotification* localNotification = [[UILocalNotification alloc] init];
localNotification.userInfo = #{PLANNED_EVENT_ID : #"some id"};
localNotification.fireDate = someStartDate;
localNotification.alertBody = #"Some text";
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
This method works as expected when I set the above when application is in foreground, but if I use this code when application is in background (pressed home button), then it is not fired at all?
Why on earth will this not work? How can I get the result I need? I need to able to use this code when application is in background.
Thanks!
To be more clear, in my AppDelegate i have the method
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)
When I get the first notification inside this method (which works, it is scheduled in a view controller), I schedule another notification in the same way (1 min from now). So I tried to have the application in foreground, then it worked, but when I had it in background, it didn't.
Tested on Simulator though.
The method
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)
is called when the app opens after a local notification has been shown to the user and the user has opened the app from the notification. If the user doesn't open the app from the notification then this method will not be called. So your next notification is never actually added.
I would like to know, if it is possible to somehow "wake up" a task that is in the background, to quickly check something on the network.. I think that this could be done with UILocalNotification, however, no matter what I tried, I could not get the didReceiveLocalNotification to do ANYTHING when the app is in the background.. After starting up, I immediately close the app by pressing the Home button (there is a 10 second delay for local notification to fire). This code works PERFECTLY when the app is in the foreground, and just kind of sitting there...
In app delegate header file:
UILocalNotification *localNotif;
For testing, I set up local notification to fire quickly in the appDelegate startup.
localNotif = [[UILocalNotification alloc] init];
localNotif.fireDate = [NSDate dateWithTimeIntervalSinceNow:10]; // the date you want the notification to fire.
localNotif.timeZone = [NSTimeZone defaultTimeZone];
[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
NSLog(#"setup the timer for 10 seconds");
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
UIApplicationState state = [application applicationState];
NSLog(#"getting kicked");
if (state == UIApplicationStateInactive) {
// Application was in the background when notification was delivered.
NSLog(#"INACTIVE..");
} else {
NSLog(#"ACTIVE..");
}
}
The user has a couple of choices: #1) Do they want to see a notification for your app. #2) If notifications are enabled for your app, do they want to click on your notification to launch your app. If they do accept notifications and open your notification while your app is in the background, application:didReceiveLocalNotification is called. To be clear, the user has to accept the notification (such as sliding the slider underneath the notification)... otherwise NOTHING is called.
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
NSLog(#"%#", notification);
}
If your app has been terminated application:didFinishLaunchingWithOptions: is called -
- (BOOL)application:(UIApplication *)
application didFinishLaunchingWithOptions:
(NSDictionary *)launchOptions {
UILocalNotification *theNotification =
[launchOptions
objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
NSLog(#"%#", theNotification);
return YES;
}
Is there a way to programmatically remove/dismiss UILocalNotification from Notification Tray.
I am able to cancel the notification which removes the notifications from
[[UIApplication sharedApplication] scheduledLocalNotifications]
Here is what i need to do
I need to dismiss the UILocalNotification from NotificationTray after the action has been performed(ie after the user taps the notification)
EDIT:
I can remove the notifications from the NSNotificationCenter. I want to remove specific notifications from the Notification Tray .Like the user presses the clear button to clear all the notifications belonging to a particular application.
You can cancel all notifications using:
[[UIApplication sharedApplication] cancelAllLocalNotifications];
If you want to remove a particular notification, you can use userinfo of notification object, when you create a local notification add a unique ID to that. Later you can use that ID for removing local notification.
For that you can use the following code:
NSString *notificationId = #"id_to_cancel";
UILocalNotification *notification = nil;
for(UILocalNotification *notify in [[UIApplication sharedApplication] scheduledLocalNotifications])
{
if([[notify.userInfo objectForKey:#"ID"] isEqualToString:notificationId])
{
notification = notify;
break;
}
}
[[UIApplication sharedApplication] cancelLocalNotification:notification];
I believe I had a similar issue. When the app entered the foreground I attempted to clear past notifications to remove any old notifications from the notifications tray.
I did something like this to grab old notifications and remove them:
NSArray *activeNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
NSArray *pastNotifications = [activeNotifications filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"firDate < %#", [NSDate date]]];
for (UILocalNotification *notification in pastNotifications) {
[[UIApplication sharedApplication] cancelLocalNotification:notification];
}
However, it seems that scheduledLocalNotifications does not include locations whose fire date is already past even though they still appear in notification center.
Calling cancelAllLocalNotifications does seem to remove past notifications as well. So we can grab all the current notifications, cancel everything, and then add the ones we're still interested in back.
// Grab all the current notifications
NSArray *activeNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
// Clear all notifications to remove old notifications
[[UIApplication sharedApplication] cancelAllLocalNotifications];
// Add back the still relevant notifications
for (UILocalNotification *notification in activeNotifications) {
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
}
Additionally we can do some filtering of the notifications before adding them back if some are no longer needed, and we can grab the active notifications when the app becomes active, store them in an instance variable, and only add them back when the app moves to the background
[UIApplication sharedApplication].applicationIconBadgeNumber = 0;
will do some trick too
but if you didnot use applicationIconBadgeNumber, it will not work, so trick is set
applicationIconBadgeNumber first :)
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:1];
If the Application is not running, you will be receiving the Local Notification object in the
-applicationDidFinishLaunchingWithOptions:
like:
UILocalNotification *localNotif = [launchOptions objectForKey: UIApplicationLaunchOptionsLocalNotificationKey];
or else you can get it in
(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
Now you can remove it from the Notification Center using
[[UIApplication sharedApplication]
cancelLocalNotification:notificationToCancel];
// deletes a pushnotification with userInfo[id] = id
-(void)deleteLocalPushNotificationWithId:(NSString*)id{
for(UILocalNotification *notification in [[UIApplication sharedApplication] scheduledLocalNotifications]){
if([[notification.userInfo objectForKey:#"id"] isEqualToString:id]){
[[UIApplication sharedApplication] cancelLocalNotification:notification];
}
}
}
// deletes all fired pushnotifications
-(void)clearLocalPushNotifications{
NSArray *activeNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
// Clear all notifications to remove old notifications
[[UIApplication sharedApplication] cancelAllLocalNotifications];
// Add back the still relevant notifications
for (UILocalNotification *notification in activeNotifications) {
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
}
}
I was fiddling with some code and I was wondering why local notifications are stored in the notification center if the application is in the foreground. It's probably because Apple doesn't know what you are doing with them and honestly doesn't care; so they do their job.
As far as the question is concerned, I do the following:
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
if (application.applicationState == UIApplicationStateActive)
{
NSLog(#"active");
// display some foreground notification;
[application cancelLocalNotification:notification];
}
else
{
NSLog(#"inactive");
}
}
So I just read this thread about how to close/remove all the already fired local notifications from the Notification center, if the user opens the app by clicking the app icon, not the notification. But after all of this, the other scheduled local notification should fire in the future.
Here is my easy solution for this, which should be triggered on application did becomeActive:
UIApplication* application = [UIApplication sharedApplication];
NSArray* scheduledNotifications = [NSArray arrayWithArray:application.scheduledLocalNotifications];
application.scheduledLocalNotifications = scheduledNotifications;
I ve tried the [[UIApplication sharedApplication] cancelLocalNotification:notification]; but it did not clear the already fired local notifications from the Notification center (outside of the app).
Well the title is self explained. I want to create an App that can manage programmed local notifications when App is in background mode. Notifications works smoothly but I want to fire a custom method when the alert is fired.
Is it possible?
Thank you.
Yes it can be done. You can do somethng like this:
- (void)applicationDidEnterBackground:(UIApplication *)application {
[NSTimer scheduledTimerWithTimeInterval:17.0 target:self selector:#selector(makeNotificationRequest:) userInfo:nil repeats:YES];
}
-(void)makeNotificationRequest:(NSTimer *)timer
{
CLLocation *location = [[AppHelper appDelegate] mLatestLocation];
NSMutableDictionary *paramDic = [[NSMutableDictionary alloc] init];
#ifdef _DEBUG
[paramDic setValue:[NSString stringWithFormat:#"77.586"] forKey:#"Lat"];
[paramDic setValue:[NSString stringWithFormat:#"12.994"] forKey:#"long"];
#else
[paramDic setValue:[NSString stringWithFormat:#"%f",location.coordinate.latitude] forKey:#"Lat"];
[paramDic setValue:[NSString stringWithFormat:#"%f",location.coordinate.longitude] forKey:#"long"];
#endif
WNetwork *mNetwork = [[WNetwork alloc] init];
[mNetwork makeRequsetWithURL:URL_Showbeeps type:JBJsonParser paramDictionary:paramDic delegate:self];
[mNetwork autorelease];
NSLog(#"URL HIT%#",paramDic);
[paramDic autorelease];
}
And to customize your action on alert you can use this:
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
UIApplicationState state = [application applicationState];
if (state == UIApplicationStateActive) {
;
}
}
If the app were in the foreground then you would want the - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification method of UIApplicationDelegate, however the documentation suggests that this will not be called when the app is in the background.
You can get a list of local notifications by calling scheduledLocalNotifications on your UIApplication instance - you can then poll these for their times and schedule a function to call at that time in your background mode. This won't necessarily 100% match up with when the Local Notification fires though, but I think it's as close as the App Store guidelines will let you get.
You can also present your own Local Notifications when you are in background mode by calling the presentLocalNotificationNow: method:
https://developer.apple.com/library/IOS/#documentation/UIKit/Reference/UIApplication_Class/Reference/Reference.html#//apple_ref/occ/instm/UIApplication/presentLocalNotificationNow:
so you could work around this by just presenting your own notifications and not scheduling them for the OS to deliver.
If you are trying to access Local Notifications from other applications then I don't think this is allowed.
No ..no custom methods are defined while app is running in background..Once an notification is fired we can;t change the alert message also. But nice when we show the alert message then by clicking the yes button to the alert take you to the one method called app is Running in Background which is in AppDelegate.m file
How can I clear the badge which appears on application icon when I receive Push Notification? I want to clear it once user has either tapped on "View" of Push notification alert or has tapped on the app icon.
I suspect you are talking about the SpringBoard's badge:
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:0]
Badge count set Zero
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:0]
Cancel all local notifications with this code:
[[UIApplication sharedApplication] cancelAllLocalNotifications];
Cancel one local notification with this line of code:
[[UIApplication sharedApplication] cancelLocalNotification:theNotification];
here theNotification is a UILocalNotification object, so in order to cancel a specific notification, you need to hold on to it's UILocalNotification.
Check this.
For Mac OS X Lion, it's:
[NSApp dockTile].badgeLabel = #"";
(Lion supports badge-type push notifications.)
From Apple's documentation, set the application.applicationIconBadgeNumber to the number you want displayed on the badge. If you set it to 0, it will be cleared.
- (BOOL)application:(UIApplication *)app didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UILocalNotification *localNotif = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
if (localNotif) {
NSString *itemName = [localNotif.userInfo objectForKey:ToDoItemKey];
[viewController displayItem:itemName]; // custom method
application.applicationIconBadgeNumber = localNotif.applicationIconBadgeNumber-1;
}
[window addSubview:viewController.view];
[window makeKeyAndVisible];
return YES;
}
Reference - Scroll down to the Handling Local and Remote Notifications section just above listing 2.4