I have following line of code to generate local notification after every 1 minute (For Testing), It works perfectly in following condition.
When application is in running state.
When application is in background state and and localNotification.alertBody = #"Local Notification Received" is not commented.
Now when i comment the "localNotification.alertBody" it works fine when application is in running state but didn't work when application is in background state.
Following is the line of code to create local notification.
UILocalNotification *localNotification = [[UILocalNotification alloc] init];
[localNotification setRepeatInterval:NSMinuteCalendarUnit];
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.repeatCalendar = [NSCalendar currentCalendar];
localNotification.fireDate = fireDateOfNotification;
//localNotification.alertBody = #"Local Notification Received";
localNotification.repeatInterval = NSMinuteCalendarUnit;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
[localNotification release];
in - (void)applicationDidEnterBackground:(UIApplication *)application
bgTask = [application beginBackgroundTaskWithExpirationHandler: ^{
dispatch_async(dispatch_get_main_queue(), ^{
[application endBackgroundTask:self->bgTask];
self->bgTask = UIBackgroundTaskInvalid;
It seems that you are trying to execute code in the background, without showing a notification to the user.
By definition, UILocalNotification will not display a popup if alertBody is nil, even though didReceiveLocalNotification will be called PROVIDED THAT THE APPLICATION IS RUNNING.
If the application is in the background and alertBody is empty, then no popup alert and no execution of any code.
From the API documentation:
alertBody
...
Assign a string or, preferably, a localized-string key (using NSLocalizedString) as the value of the message. If the value of this property is non-nil, an alert is displayed. The default value is nil (no alert).
Are you sure that application:didReceiveLocalNotification: has not been called at all? Or is it just the alert you are missing?
Related
i used this Link to set Repeat UILocalNotification and my code run successfully but the problem is that even when i delete my Application , alerts are poping up is there is any way to cancel the repeat UILocalNotification pragmatically
this is the code which i am using to set repeat UILocalNotification after 1 minute
- (void)alertSelector:(NSString *)AlertTitle WithFiringTime:(NSDate *)date{
UILocalNotification *localNotification = [[[UILocalNotification alloc] init] autorelease];
if (!localNotification)
return;
[localNotification setFireDate:date];
[localNotification setTimeZone:[NSTimeZone defaultTimeZone]];
NSDictionary *data = [NSDictionary dictionaryWithObject:date forKey:#"payload"];
[localNotification setUserInfo:data];
[localNotification setAlertBody:AlertTitle];
[localNotification setAlertAction:#"View"];
[localNotification setHasAction:YES];
localNotification.repeatInterval = NSMinuteCalendarUnit;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
}
with the code below i cancel the UILocalNotification but it cancel all the UILocalNotification and i want to cancel only the UILocalNotification which is poping up after 1 minute , Repeat UILocalNotification
[[UIApplication sharedApplication] cancelAllLocalNotifications];
Thankx in advance
Instead of using cancelAllLocalNotifications you should retain the notification you wish to cancel at some point in the future and use the cancelNotification: method.
cancelNotification: lets you cancel specific notifications, but the fairly obvious caveat is you must keep the notification objects you wish to cancel hanging around!
I want to implement local notification in my clock app.Basically i want that a music file should be played after every half an hour like in ship's clock in which chimes are played after every 30 minutes.
Can anyone give rough idea as how i can implement this functionality even when the app enters in background?
I recently used the Local notification stuff and used the following functions
//Setting up the Local Notifications
for (int i= 1 ; i<=10; i++) { //We here set 10 Notification after every 30 minutes from now you can modify it accordingly
NSDate *scheduled = [[NSDate date] dateByAddingTimeInterval:60*30*i]; //These are seconds
NSDictionary* dataDict = [NSDictionary dictionaryWithObjectsAndKeys:scheduled,FIRE_TIME_KEY,#"Background Notification received",NOTIFICATION_MESSAGE_KEY,nil];
[self scheduleNotificationWithItem:dataDict];
}
Where scheduleNotificationWithItem is defined as
- (void)scheduleNotificationWithItem:(NSDictionary*)item {
UILocalNotification *localNotification = [[UILocalNotification alloc] init];
if (localNotification == nil) return;
localNotification.fireDate = [item valueForKey:FIRE_TIME_KEY];
localNotification.timeZone = [NSTimeZone defaultTimeZone];
localNotification.alertBody = [NSString stringWithFormat:NSLocalizedString(#"%#", nil), [item valueForKey:NOTIFICATION_MESSAGE_KEY]];
localNotification.alertAction = NSLocalizedString(#"View Details", nil);
localNotification.soundName = UILocalNotificationDefaultSoundName;
localNotification.userInfo = item;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
[localNotification release];
}
Finally you can handle these notifications as
You can handle these notifications as follows
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
// Do the required work you can obtain additional Info via notification.userInfo which happens to be a dictionary
}
reading the developer documentation will help you more to understand the stuff.Hope it helps
You can use UILocalNotifications and set their 'firedate', according to your requirement and then schedule the notification. These notifications doesn't bother whether your app is running or is in background they will always show up like an alertview.
I'm trying to build an alarm clock similar to the Alarm Clock Pro and the Nightstand application that are currently in the app store. Each of these applications is able to play an alarm clock sound for more than 30 seconds when the alarm time is hit (usually the next morning).
I've tried two approaches already with no luck:
Approach 1:
[self performSelector:#selector(playAlarm) withObject:nil afterDelay:myDouble];
Approach 2:
UILocalNotification *notif = [[cls alloc] init];
notif.fireDate =[datePicker date];//firedate;
notif.timeZone = [NSTimeZone systemTimeZone];
notif.alertBody = #"Time to wake up!";
NSString *SoundFileName=nil;
if([[[NSUserDefaults standardUserDefaults] objectForKey:#"ActualSoundFile"] isKindOfClass:[NSString class]])
SoundFileName=[[[NSString alloc]initWithString:[[NSUserDefaults standardUserDefaults]objectForKey:#"ActualSoundFile"]]autorelease];
else
SoundFileName=[[[NSString alloc] initWithString:#""] autorelease];
if([SoundFileName length]>1)
notif.soundName = [SoundFileName stringByAppendingString:#".wav"];
else
notif.soundName = UILocalNotificationDefaultSoundName;
notif.alertAction=#"Snooze";
notif.repeatCalendar=[NSCalendar currentCalendar];
notif.repeatInterval =NSDayCalendarUnit;
NSDictionary *userDict = [NSDictionary dictionaryWithObject:#"Alarm" forKey:kRemindMeNotificationDataKey];
notif.userInfo = userDict;
[[UIApplication sharedApplication] scheduleLocalNotification:notif];
[notif release];
Does anyone know how they're able to play the alarm on a loop after 7 hours?
The selected answer is not the right answer, because the user may wake up during the first notification and choose to close it. Guess what, the second notification comes along giving the user the impression that the alarm is broken.
The correct answer according to App docs is as follows:
You can not play a sound more than 30 seconds when your notification arrives while your app is in the background (e.g. user closes the app before going to sleep).
To play a longer sound, you must tell your user to leave the alarm app in the foreground before going to sleep, then in didReceiveLocalNotification you implement playing a longer sound manually.
You need to fire local notification by assigning date into fireDate property, and assign sound file into
UILocalNotification *localNotif = [[[UILocalNotification alloc] init]autorelease];
localNotif.fireDate = scheduleDate;
NSLog(#"fireDate is %#",localNotif.fireDate);
localNotif.timeZone = [NSTimeZone defaultTimeZone];
localNotif.alertBody = #"WAKE UP...!!!";
localNotif.alertAction = #"View";
localNotif.soundName = #"Default.wav";
[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
This way, local notification will be fired even if application is closed, remember that "Default.wav" file should be less than or equal to 30 seconds, Even Alarm clock pro app plays sound =30 seconds in local notification.
If application is alive, you can implement delegate method of appdelegate, and can apply your logic to display alert view and play sound even >30 seconds .....
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
}
So I think I found a valid solution:
To simulate the alarm sound playing for more than 30 seconds, just add multiple localnotifications one after the other, 30 seconds apart.
i want that my app will run in the background and do check on somethings.
and if so the local notification will show.
i use this code in the method that check:
UIApplication *app = [UIApplication sharedApplication];
UILocalNotification *notification = [[UILocalNotification alloc] init];
NSArray *oldNotifications = [app scheduledLocalNotifications];
if ([oldNotifications count] > 0) {
[app cancelAllLocalNotifications];
}
if (notification == nil)
return;
NSDate *notificationDate = [NSDate dateWithTimeIntervalSinceNow:10];
notification.fireDate = notificationDate;
notification.timeZone = [NSTimeZone systemTimeZone];
notification.alertBody = #"Test Body";
[app scheduleLocalNotification:notification];
[notification release];
the problem is that when the app is in the foreground it show the alert, but if the app is in the background the notification not show to the screen.
the check that i do is running on uiwebview and reload every 10 seconds, so he need to run in the background too.
Your app won't run in background, except certain cases. Look in to this How to run the application in the background? post.
i want to set localnotification say for a program which starts at 6:00 pm.For that i have taken the time in a date variable and i am comparing it with current date from system.
Say setDate is for fixed date i.e 6.00 pm so i have to set firedate such that it shows the notification before 30 mintes the program starts. The examples i have seen in that the firedate is set according to currentdate.
Can someone tell me how can i set firedate according to my fixed date??
You fire the local notification this way
UILocalNotification *localNotif = [[UILocalNotification alloc] init];
if (localNotif == nil)
return;
localNotif.fireDate = [NSDate date];// Now here you can manage the fire time.
localNotif.timeZone = [NSTimeZone defaultTimeZone];
// Notification details
localNotif.alertBody = #"BusBuddy";
// Set the action button
localNotif.alertAction = #"View";
localNotif.soundName = UILocalNotificationDefaultSoundName;
localNotif.applicationIconBadgeNumber = 1;
// Specify custom data for the notification
NSDictionary *infoDict = [NSDictionary dictionaryWithObject:#"You are near to reach the Bus Stop" forKey:#"someKey"];
localNotif.userInfo = infoDict;
// Schedule the notification
[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
[localNotif release];
This line of code will work for you. you just need to provide the date time for this
localNotif.fireDate = [NSDate date];
And now for formatting your date time you can refer to these links
iphonedevelopertips.com
developer.apple.com, CFDatesAndTimes
developer.apple.com, DataFormatting
Well then you can handle your local notification in application delegate file when ever you get the notification.
e.g. here is the delegate method which is fired everytime when you get the local notification.
- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif {
//Handle the notificaton when the app is running
NSLog(#"Recieved Notification %#",notif);
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Hey Neha" message:#"Sanjay wants to be your friend " delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil, nil];
[alertView show];
[alertView release];
SystemSoundID bell;
AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"WhoopFlp" ofType:#"wav"]], &bell);
AudioServicesPlaySystemSound (bell);
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
i=0;
}
}
So what I am doing here is simply showing the alert and playing a system sound when my local notification occurs.
So now what you want is to navigate to the page in the program where you were when you get the local notification.So simply in this delegate method you need to allocate your view controller and need to push the view controller to that view where you want to be.
That would solve your problem.
Well i had a similar kind of problem what i wanted is to show the notification in the background and in the front end as well, so writing the 2 different methods in my app was not worthful.so i handled it this way in the delegate method which will show the notification in the front end as well.
Good luck to you.
localnotification =[[UILocalNotification alloc]init];
[localnotification setFireDate:[NSDate dateWithTimeIntervalSinceNow:[lodatepicker countDownDuration]]];
[localnotification setAlertAction:#"Launch"];
[localnotification setHasAction: YES];
[localnotification setAlertBody:[lotextview text]];
// [localnotification setSoundName:musicString];
localnotification.timeZone = [NSTimeZone defaultTimeZone];
[localnotification setApplicationIconBadgeNumber:[[UIApplication sharedApplication] applicationIconBadgeNumber]+1];
[[UIApplication sharedApplication] scheduleLocalNotification:localnotification];