application:openURL not triggered - objective-c

Question

I have a problem implementing - (BOOL)application:openURL and using UIDocumentInteractionController for exporting PDF file from an application to another.
(1) Target application does nothing but just display URL of the imported PDF file (in a label).
here is the code in AppDelegate.m:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[ViewController alloc] initWithText:#"No file is imported."];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication: (NSString *)sourceApplication annotation:(id)annotation
{
if (url != nil)
{
[self.viewController handleOpenURL:url];
return YES;
}
else
{
[self.viewController handleOpenURL:[NSURL fileURLWithPath:#"AppDelegate.h"]];
return NO;
}
}
Method "handleOpenURL" just take the url and put in a label in the view controller and show an alert:
- (void)handleOpenURL:(NSURL *)fileURL
{
_text = [fileURL absoluteString];
self.lblText.text = _text;
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:#"Alert" message:_text delegate:self cancelButtonTitle:nil otherButtonTitles:nil, nil];
[alert show];
}
(2) In source application, I simply use UIDocumentInteractionController to list "Open In" options (my target application appears well in the list)
Here is the code:
_docInteractionController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:attachmentFile]];
_docInteractionController.delegate = self;
_docInteractionController.UTI = [_extensionUTIs objectForKey:[[attachmentFile pathExtension] lowercaseString]];
BOOL opened = [_docInteractionController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:NO];
(3) Problem:
- When I select the target application (from "Open In" list), simulator switches from source application to target application okay, but looks like application:openURL method is not invoked because the label keeps as initial (No file is imported.) and no alert view shows up.
Please advise me what could be wrong here ?
Thanks in advance.

Answer 1

I used these two methods for facebook integration to handle openURL...its working fine.
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
return [ [[HIFacebookConnect sharedGameObject] facebook] handleOpenURL:url];
}
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
return [[[HIFacebookConnect sharedGameObject] facebook] handleOpenURL:url];
}

Answer 2

Just want to mark my question as answered because I have already found the glitch.
Update: It was my fault when not including full file path when initiating UIDocumentInteractionController object.