How to tell which local notification has been received? Objective - C - iphone

Question

I have this piece of code which calls a different NSLog statement depending on which local notification has been received:
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
if (notification == automaticBackupNotification)
{
NSLog(#"Backup notification received.");
}
else
{
NSLog(#"Did receive notification: %#, set for date:%# .", notification.alertBody, notification.fireDate);
}
}
And I use this method to schedule the notification in another class:
- (IBAction)automaticValueChanged {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if (automaticSwitch.isOn){
[defaults setValue:#"1" forKey:#"automatic"];
//schedule notification
//Set up the local notification
appDelegate.automaticBackupNotification = [[UILocalNotification alloc] init];
if(appDelegate.automaticBackupNotification){
//Repeat the notification according to frequency
if ([backupFrequencyLabel.text isEqualToString:#"Daily"]) {
appDelegate.automaticBackupNotification.repeatInterval = NSDayCalendarUnit;
}
if ([backupFrequencyLabel.text isEqualToString:#"Weekly"]) {
appDelegate.automaticBackupNotification.repeatInterval = NSWeekCalendarUnit;
}
else {
appDelegate.automaticBackupNotification.repeatInterval = NSMonthCalendarUnit;
}
//Set fire date to alert time
NSCalendar *calendar = appDelegate.automaticBackupNotification.repeatCalendar;
if (!calendar) {
calendar = [NSCalendar currentCalendar];
}
NSDateComponents *components = [[NSDateComponents alloc] init];
components.day = 1;
//NSDate *nextFireDate = [calendar dateByAddingComponents:components toDate:[NSDate date] options:0];
//appDelegate.automaticBackupNotification.fireDate = nextFireDate;
appDelegate.automaticBackupNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:20.0];
//Set time zone to default
appDelegate.automaticBackupNotification.timeZone = [NSTimeZone defaultTimeZone];
// schedule notification
UIApplication *app = [UIApplication sharedApplication];
[app scheduleLocalNotification:appDelegate.automaticBackupNotification];
NSLog(#"Backup Fire Date: %#", appDelegate.automaticBackupNotification.fireDate);
}
}
else {
[defaults setValue:#"0" forKey:#"automatic"];
if(appDelegate.automaticBackupNotification){
[[UIApplication sharedApplication] cancelLocalNotification:appDelegate.automaticBackupNotification];
}
}
[defaults synchronize];
}
However, when the application delegate receives the notification it fires the 'else' part of the conditional. Is there any way I can tell between the different notifications? Or am I doing something wrong?
Cheers,
Tysin

Answer 1

NSNotification object has property, which called userInfo. It is a NSDictionary, you can set some values where you create the notification and check for them where you receive it.

Answer 2

Just try to set userInfo property of your UILocalNotification, like this,
NSDictionary *userDict = [NSDictionary dictionaryWithObject:#"YOUROBJECT" forKey:#"TESTKEY"];
YOURNOTIFICATION.userInfo = userDict;
and when UILocalNotification fires this methods will be called,
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
NSDictionary *dict = [notification userInfo];
id obj = [dict objectForKey:#"TESTKEY"];
}
Based on userInfo you set at the time of setting UILocalNotification, You can find out which notification got called.

Answer 3

I personnaly use the notification name to know which notification push or have been received
//add local observer
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(mathodCalled:) name:[NSSTring StringWithFormat :#"plop"] object:nil];
...
//push an event manually
[[NSNotificationCenter defaultCenter] postNotificationName:eventName object:[NSSTring StringWithFormat :#"plop"]];
...
- (void)methodCalled :(NSNotification*)aNotification{
if([aNotification.name isEqualToString:#"plop"]){
// do something
}
}