UIDocumentInteractionController for Open In menu - Doesn't Work

Question

I implemented a UIDocumentInteractionController to send files to other apps. The file is a .txt file.

Here's the code:

UIDocumentInteractionController *interactionController = [[UIDocumentInteractionController alloc] init];
[interactionController setURL:[NSURL fileURLWithPath:filePath]];
[interactionController setUTI:@"public.text"];
[interactionController setDelegate:self];
[interactionController presentOpenInMenuFromBarButtonItem:actionBarButtonItem animated:YES];

The menu opens fine, showing apps like Pages, Dropbox, etc. as I expect. But when I tap one of them, the Open In menu dismisses and no action is performed (the file is not sent and the target application never opens.

I tried implementing the delegate methods documentInteractionController:canPerformAction: and documentInteractionController:performAction: for triggering copy: and print: calls using the options menu (as opposed to the open in menu) and that pulled up a menu with only Pages listed, but that still did not work.

How might this be resolved?

jstm88 · Accepted Answer · 2011-11-12 04:47:36Z

51

I found the answer, and it's memory management. I create the UIDocumentInteractionController and then present it, but I don't have it as an instance variable. ARC deallocates it before it has the opportunity to do anything. This includes sending the document to the external app.

This bug didn't appear on the iPhone, but on the iPad it gives an error because the popover architecture works a bit differently and it ends up trying to draw it when it's deallocated. That's what alerted me to the bug.

answered Nov 12, 2011 at 4:47

jstm88

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3 Comments

huoxinbird Over a year ago

thanks! I have been searching on stack for a long time and I finally found this answer works for me.

tony.tc.leung Over a year ago

This is the answer for ARC projects. You have to declare a property for the UIDocumentInteractionController: @property(nonatomic, strong)UIDocumentInteractionController * docController;

Serg Shiyan Over a year ago

thnx. have spent a couple of hours. but forget about arc. thnx a lot one more time.

rosaMerino · Accepted Answer · 2013-02-07 15:17:21Z

16

This bug also appears on iPhone/iPod. Just set:

@property (nonatomic, retain) UIDocumentInteractionController *docController;

and it will be retain and the document passed to the new application.

answered Feb 7, 2013 at 15:17

rosaMerino

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Comments

iPhoneGeek · Accepted Answer · 2013-01-30 13:17:16Z

-4

it's enough to add the following code:

[interactionController retain];

answered Jan 30, 2013 at 13:17

iPhoneGeek

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