File sharing / send file in another app (“open in” in iOS)

Question

my app make a simple file called log.txt

the URL of this file (viewed in xcode) is file://localhost/var/mobile/Applications/NUMBER OF THE APPLICATION/Documents/

Answer 1

Its a memory management issue. The main reason it crashes is because the object is not retained. Thats why if you declare it in the .h file and write an @property for retain when you do assign it the object gets retained.

So in your interface file (.h) you should have

@property (retain)UIDocumentInteractionController *documentController;

Then in your .m (implementation file) you can do

@synthesize documentController;

- (void)openDocumentIn{

    // Some code here

    self.documentController = [UIDocumentInteractionController interactionControllerWithURL:fileURL];
        documentController.delegate = self;
    documentController.UTI = @"public.text";
    [documentController presentOpenInMenuFromRect:CGRectZero
                                   inView:self.view
                                 animated:YES];
    // Some more stuff
}