I am trying to crack the way local notification work.
I wrote this line in order to present the notification I scheduled:
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
[[UIApplication sharedApplication] presentLocalNotificationNow:notification];
}
The issue is that it runs endless number of times.
If I write something else it runs only one time, but i understood that this line should pop up the message of the notification.
Can anyone shed some light?
Thanks,
presentLocalNotificationNow is triggering didReceiveLocalNotification which in turn is calling presentLocalNotificationNow... so you end up with an endless loop.
Found it,
I didn't realize that by reaching the didReceiveLocation method it automatically sends a notification message if the iPhone is not activated.
No need to write anything...
Related
For VOIP application we are sending PING packet to server every 10 minutes using setKeepAliveTimeout, everything works fine, however I'm not sure how to stop the handler from being called once application came foreground.
eg: Here is how I set the timeout
[[UIApplication sharedApplication] setKeepAliveTimeout:600 handler:^{ [self backgroundHandler]; }];
Background handler:
- (void)backgroundHandler
{
printf("10 minute time elapsed\n");
// do some action...
}
Above function is being called even after application came foreground, I have read in Apple documentation to set the handler nil to stop it. I have tried like below in applicationWillEnterForeground
[UIApplication sharedApplication] setKeepAliveTimeout:600 handler:nil];
Still I'm getting call every 10 mins. How to handle this, Do I need to use flag only.
Any help is really appreciated.
you can do it like this
- (void)applicationWillEnterForeground:(UIApplication *)application
{
// Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
[[UIApplication sharedApplication] clearKeepAliveTimeout];
}
You have to invoke clearKeepAliveTimeout to stop the timer. setKeepAliveTimeout: is designed to keep a voip connection on and that's why it's periodically called.
I want to schedule a local notification when my previous local notification gets fired.
It should get scheduled disregarding the user taps 'View' or 'Cancel'.I am not getting proper place(delegate method)to schedule a new notification.According to Apple docs,application:(UIApplication *)application didFinishLaunchingWithOptions: can be used but it doesn't seems to be get called when application comes to foreground from background and application:(UIApplication *)application didReceiveLocalNotification: gets called only on click of 'View' and not on close.How should I do this?Any help is highly appreciated.
Yes. You are correct about the local notifications. You should click "view" to get the didReceiveLocalNotification: triggered. If you click "Cancel", you are not caring about the notificaiton. If you don't care, why should the iOS care? :-)
You are scheduling the notification. So, you know when it will be fired. Don't you? Then why wait for the first notification to be fired? Just schedule the second notification along with the first notification.
A workaround:
Local and Push Notification Programming Guide
says that only 64 local notifications are allowed per app. So, schedule the first 64 notifications initially. And when the app opens the next time, check [UIApplication sharedApplication] scheduledLocalNotifications], and schedule the next (64 - scheduledLocalNotifications) notifications.
int scheduledNotifications = [UIApplication sharedApplication] scheduledLocalNotifications];
int n = 64 - scheduledNotifications;
[self Schedule-next-n-notifications];
Note: We can't guarantee that this will work perfectly. In case, if the app opens after very long gap, for example after 1 or 2 months, some notifications would have not been scheduled at the proper time.
I'm developping an app that sends tips to users every five minutes through UILocalNotifications. The problem is that if you don't use your phone for a while, the notifications pile up and when you unlock the phone, you have to dismiss them one after the other, which can become quite annoying if you haven't used the phone for quite a while. Clicking the action button on the Alert sends you back to the application but even then, you still have to go through all the notifications.
Is there any means of dismissing all the notifications that have already been fired with a single click ?
Thanks for your help.
Miky Mike
Well, actually, I realize I made a mistake.
In order to cancel all the UIlocalNotifications at one, I just have to create this simple method : one line of code is enough :
- (void)application:(UIApplication *)app didReceiveLocalNotification :(UILocalNotification *)notification {
[[UIApplication sharedApplication] cancelAllLocalNotifications];
}
and there you are. Thanks anyway.
Before scheduling the next alarm you better to cancel all the previous notifications and then set the new one,
UIApplication* app = [UIApplication sharedApplication];
NSArray* oldNotifications = [app scheduledLocalNotifications];
// Clear out the old notification before scheduling a new one.
if ([oldNotifications count] > 0)
[app cancelAllLocalNotifications];
I'm receiving two alerts for the notification below, and I cannot for the life of me figure out why. The code only appears to be called once, but App: didReceiveLocalNotification is being called twice. And I can't figure out why!
NSLog(#"Configuring notifications time is up.");
noTimeLeft=[[UILocalNotification alloc]init];
noTimeLeft.fireDate=meterEndTime;
noTimeLeft.alertBody=#"Your parking meter has expired!";
noTimeLeft.alertAction=#"Go to meter";
noTimeLeft.userInfo=[NSDictionary dictionaryWithObject:self.meterEndTime forKey:#"NSDate"];
[[UIApplication sharedApplication] scheduleLocalNotification:noTimeLeft];
NSLog(#"Configuring notifications finished time is up.");
local notification "didReceiveLocalNotification" calls twice
Turns out it's a bug in the simulator.
How did I MISS that question when I was searching though, lol.
Is there any way to detect if the iPhone wakes up from sleep while you're app is running? Eg: your app is running, the user locks the screen (or the screen auto locks) and some time later the user unlocks the screen and up pops your app. Is there some way to get an event at that point or detect it somehow?
I've tried searching the Google and this forum, but I can't seem to find anything about it.
See applicationDidBecomeActive: on UIApplicationDelegate.
Stick these in you AppDelegate.m file:
-(void) applicationWillResignActive:(UIApplication *)application {
NSLog(#"Asleep");
}
-(void) applicationDidBecomeActive:(UIApplication *)application {
NSLog(#"Awake");
}
#Kevin - Nothing wrong with your answer - thanks by the way. Just thought I'd save the next person a Google search.