iOS local notification: I would like to execute a function upon reentering the app via local notification - iphone

Question

I'm working with XCode 4.6, and am trying to build a local notification feature on iOS that will execute a function upon reentering the app.Basically I would like to change the text in some of the labels and add some sound upon reentering the app. I thought I was on the right track, but only some parts of my code work when reentering the app via local notification.
First I added this function to my AppDelegate:
-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
NSLog(#"test1"); //this traces successfully
myAppViewController * controller = [myAppViewController alloc];
[controller doSomething]; //calling a function in my myAppViewController.m
}
I thought I had figured it out, but now only the NSLog works in my function in myAppViewController.m:
-(void)doSomething{
NSLog(#"do something"); //traces successfully
self.notificationTime.text=#"something else"; //nothing happens here, it works in other functions but not here
[self doSomethingElse]; //calling another function from this function for further testing
}
The next function is called....
-(void)doSomethingElse{
NSLog(#"do something else"); //this works
//this whole thing doesn't work -- no sound --
NSURL* url = [[NSBundle mainBundle] URLForResource:#"cash" withExtension:#"mp3"];
NSAssert(url, #"URL is valid.");
self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
[self.player prepareToPlay];
[self.player play];
//this doesn't work again
self.notificationTime.text=#"something else";
}
I was hoping to get some general advice here and it would be much appreciated. If anyone knows a complete different way of solving the problem, that would be great as well!

Answer 1

The didReceiveLocalNotification method is only called when you application is running in the foreground. If you see a badge and click on the App to start it, then you need to process the local notification using application:willFinishLaunchingWithOptions: (or application:didFinishLaunchingWithOptions:) To get at your local notification in either of these two methods, use UIApplicationLaunchOptionsLocalNotificationKey as a key to the options dictionary.
Note, once you extract the local notification from the launch options, it is a viable approach to call your didReceiveLocalNotification method.

Answer 2

You shouldn't need to allocate a second instance of the app controller. You can just use self. If you do that, does the code work as expected?