This issue or similar issues have been discussed here before, but I didn't find any working solution for me.
I am using the following code to display a UIDocumentInteractionController on an ARC-enabled iOS 7 project:
- (void) exportDoc{
// [...]
docController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:path]];
docController.delegate = self;
[docController presentOpenInMenuFromBarButtonItem:mainMenuButton animated:YES];
}
First I didn't want to create a property that holds the controller reference, but as many people said that there are not alternatives to it. It is defined as
@property (strong) UIDocumentInteractionController* docController;
exportDoc is run in the main thread using NSOperationQueue. Whenever it is executed, I get the following error message:
Terminating app due to uncaught exception 'NSGenericException',
reason: '-[UIPopoverController dealloc] reached while popover is still
visible.'
This is what the backtrace says:
(lldb) bt
* thread #1: tid = 0x1c97d9, 0x000000019a23c1c0 libobjc.A.dylibobjc_exception_throw, queue = 'com.apple.main-thread',
stop reason = breakpoint 2.1
frame #0: 0x000000019a23c1c0 libobjc.A.dylibobjc_exception_throw
frame #1: 0x000000018d982e90 CoreFoundation+[NSException raise:format:] + 128
frame #2: 0x0000000190bc348c UIKit-[UIPopoverController dealloc] + 96
frame #3: 0x0000000190e18fc8 UIKit-[UIDocumentInteractionController dealloc] + 168
frame #4: 0x000000019a255474 libobjc.A.dylib(anonymous namespace)::AutoreleasePoolPage::pop(void*) + 524
frame #5: 0x000000018d881988 CoreFoundation_CFAutoreleasePoolPop + 28
frame #6: 0x000000018e42cb18 Foundation-[NSOperationInternal _start:] + 892
frame #7: 0x000000018e4eea38 Foundation__NSOQSchedule_f + 76
frame #8: 0x000000019a813fd4 libdispatch.dylib_dispatch_client_callout + 16
frame #9: 0x000000019a8171dc libdispatch.dylib_dispatch_main_queue_callback_4CF + 336
frame #10: 0x000000018d942c2c CoreFoundation__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 12
frame #11: 0x000000018d940f6c CoreFoundation__CFRunLoopRun + 1452
frame #12: 0x000000018d881c20 CoreFoundationCFRunLoopRunSpecific + 452
frame #13: 0x0000000193511c0c GraphicsServicesGSEventRunModal + 168
frame #14: 0x00000001909b2fdc UIKitUIApplicationMain + 1156 * frame #15: 0x000000010000947c MyApplicationmain(argc=1,
argv=0x000000016fdfbc80) + 108 at main.m:16
frame #16: 0x000000019a82faa0 libdyld.dylibstart + 4
As far as I understand the autoreleasepool just releases the controller. Shouldn't this be prevented by using a strong property just as I did?
Do you have any idea what the problem can be and how I can solve it?