how to open pdf on other application like ibooks - objective-c

Question

I use UIDocumentinteractioncontroller to open pdf on other app like ibook.
But it is hard to find the doc about it.
Now I can present the open in part. but when i click on the icon of ibooks. nothing happend.
Do I need to do something in the delegate such as documentInteractionController:willBeginSendingToApplication:???

Answer 1

first you have to add the UIDocumentInteractionControllerDelegate in your .h file
i.e.:
#interface MyDocumentViewController : UIViewController <UIDocumentInteractionControllerDelegate>
in your .m file you add the protocol, which enables you to find out, what happens ...
- (void)documentInteractionController:(UIDocumentInteractionController *)controller willBeginSendingToApplication:(NSString *)application{
NSLog(#"Send to App %# ...", application);
}
- (void)documentInteractionController:(UIDocumentInteractionController *)controller didEndSendingToApplication:(NSString *)application{
NSLog(#"Finished sending to app %# ...", application);
}
- (void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller{
NSLog(#"Bye");
}
of course you have to set the delegate of the UIDocumentInteractionController to this module. I solved it like this:
-(BOOL)canOpenDocumentWithURL:(NSURL*)url inView:(UIView*)view {
BOOL canOpen = NO;
UIDocumentInteractionController* tmpDocController = [UIDocumentInteractionController
interactionControllerWithURL:url];
if (tmpDocController)
{
tmpDocController.delegate = self;
canOpen = [tmpDocController presentOpenInMenuFromRect:CGRectZero
inView:self.view animated:NO];
[tmpDocController dismissMenuAnimated:NO];
}
return canOpen;
}