How to call didReceiveLocalNotification:(UILocalNotification *)notification in iPhone? - iphone

Question

I need background process (for to call a webservice) to call didReceiveLocalNotification:(UILocalNotification *)notification once app launch state, How to do that, please help me.
Thanks in Advance
I tried this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
UILocalNotification *localNotif = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
}
- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif
{
if (app.applicationState == UIApplicationStateInactive )
{
NSLog(#"app not running");
}
else if(app.applicationState == UIApplicationStateActive )
{
NSLog(#"app running");
}
}

Answer 1

This is how I create a local notification which is scheduled at 17:00 on the day this code runs. Once it fires, the method -(void)application:didReceiveLocalNotification: will be called.
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
[calendar setTimeZone:[NSTimeZone localTimeZone]];
NSDateComponents *dateComponents = [calendar components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:[NSDate date]];
[dateComponents setHour:17];
[dateComponents setMinute:00];
[dateComponents setSecond:00];
NSDate *notificationDate = [calendar dateFromComponents:dateComponents];
UILocalNotification *localNotif = [[UILocalNotification alloc] init];
localNotif.fireDate = notificationDate;
localNotif.timeZone = [NSTimeZone defaultTimeZone];
localNotif.alertBody = #"blah blah blah";
localNotif.alertAction = #"Ok";
localNotif.soundName = UILocalNotificationDefaultSoundName;
localNotif.applicationIconBadgeNumber = 1;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];

Answer 2

Notification is recieved in 2 cases
In application:didFinishLaunchingWithOptions: method, if the app is
neither running nor in the background.
In application:didReceiveLocalNotification: method if the app is
either running or in background. Its almost useless to show the
alert when the app is already running. So you have to show the alert
only when the app was in background at the time the notification
fired. To know if the app is resuming from background use the
applicationWillEnterForeground: method.
l
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UILocalNotification *localNotif = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
if (localNotif) {
// Show Alert Here
}
}