UIDocumentInteractionController: unrecognized selector sent to instance

Question

I am using UIDocumentInteractionController to share a document (PDF) with other apps.

The view with the different apps shows up just fine but when I press any of the apps to open/save/share the file, my app crashes.

I get the Unrecognised selector sent to instance error.

It seems that the error comes from the file url I give to (not sure tho):

[UIDocumentInteractionController interactionControllerWithURL:url];

DocumentInteractionManager.h:

@interface DocumentInteractionManager : UIViewController <UIDocumentInteractionControllerDelegate>

@property (nonatomic, retain) UIDocumentInteractionController* documentInteractionController;
@property (nonatomic, copy) NSURL *url;

- (void)openDocumentFromRect:(UIView*)view withURL:(NSURL*)fileUrl;

@end

DocumentInteractionManager.m:

@implementation DocumentInteractionManager

@synthesize documentInteractionController;
@synthesize url;

//fileUrl is something like: file:///var/mobile/Containers/Data/Application/[APP]/Library/file.pdf
- (void)openDocumentFromRect:(UIView*)view withURL:(NSURL*)fileUrl {

    self.url = fileUrl;
    if (url) {
        documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:self.url];

        // Configure Document Interaction Controller
        [documentInteractionController setDelegate:self];
        CGRect rect = [view frame];

        [documentInteractionController presentOptionsMenuFromRect:[view frame] inView:view animated:YES];
    }
}


@end

EDIT:

Here is how I am creating the url: [NSURL fileURLWithPath:pdfPath]

Note that it works when I use UIActivityViewController and share via AirDrop

EDIT2:

Here are some of the different messages I get (depending on which app I choose):

• iBooks: [__NSCFString URL]: unrecognized selector sent to instance
• Copy: [OS_dispatch_queue URL]: unrecognized selector sent to instance
• Email: [NSISLinearExpression URL]: unrecognized selector sent to instance

Any Ideas ?

Answer 1

Okay, I've figured it out.

What I was doing wrong was that I was instantiating UIDocumentInteractionController in the - (void)openDocumentFromRect:(UIView*)view withURL:(NSURL*)fileUrl method. So basically when I was out of that method UIDocumentInteractionController was destroyed.

I now instantiate UIDocumentInteractionController in the init method and voilà it works as expected.