JackMorris JackMorris - 5 months ago 18
iOS Question

UILocalNotification isn't working at all

I'm having some really irritating problems with

UILocalNotification
.

While finishing up an app that I've nearly completed, I noticed that I couldn't get local notifications to work, no matter what I tried.

So instead of wasting time, I decided to go back to basics and see if I could get them working at all.

I created a new XCode view-based application, and replaced
-viewDidLoad
with this:

- (void)viewDidLoad
{
UILocalNotification * theNotification = [[UILocalNotification alloc] init];
theNotification.alertBody = @"Alert text";
theNotification.alertAction = @"Ok";
theNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:10];

[[UIApplication sharedApplication] scheduleLocalNotification:theNotification];
}


However, that also doesn't do anything at all.

I expected to see a notification 10 seconds after launching the app, but nothing appears.

Also, I tested this on both my iPhone and the simulator.

Am I missing something really crucial here? (I've searched through the Apple documentation and couldn't find anything as to why this is happening)

Thanks

Answer

UILocalNotifications are only displayed automatically if the app is not running (or running in background). If the app is running and a local notification fires, UIApplicationDelegate’s - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification method gets called and the system doesn’t display anything (nor does it play a sound). If you want to display the notification, create an UIAlertView yourself in the delegate method.