Question

I have a UIImagePickerController that i display in a popover when the user presses a button. This functions perfectly normal in the iPad simulator, but when I try to do the same thing on an actual test device, I get an NSRangeException on the alloc/init line for my image picker!

    imagePicker = [[UIImagePickerController alloc] init];//Crashes here on device
    imagePicker.delegate = self;
    imagePicker.allowsEditing = YES;
    imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    imagePicker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) (kUTTypeImage), nil];

Here is the crash message:

* Terminating app due to uncaught exception ‘NSRangeException’, reason: ‘* -[NSOrderedSet initWithOrderedSet:range:copyItems:]: range {8, 1} extends beyond bounds [0 .. 0]’

I have determined it is that exact line by attempting to step over the line in debug mode, and stepping over that particular line is what causes the exception to be thrown.

EDIT:

I was able to make a basic project that reproduces this issue 100%, which leads me to believe this is an iOS bug, not something with my code.

1. Make a new project. Select single view application. Does not matter if it is storyboard or xib-based
2. Open the iPad xib/storyboard, add a roundrectbutton to the view

3. Add the following IBAction to the viewcontroller. pickerPopoverController is a __strong ivar

   -(void)iMakeItCrash:(UIButton*)sender
   {
       UIImagePickerController* ip = [[UIImagePickerController alloc] init];
       ip.delegate = self;
       ip.allowsEditing = YES;
       ip.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
       ip.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) (kUTTypeImage), nil];
   
       pickerPopoverController = [[UIPopoverController alloc] initWithContentViewController:ip];
       [pickerPopoverController presentPopoverFromRect:sender.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
   }
   

4. Hook up this IBAction to the button’s Touch Up Inside event.

5. Works on simulator, crashes on iPad

EDIT2:

Crash still happens if I try to use presentPopoverFromBarButtonItem:. However, doesn’t crash if I don’t present the image picker at all…

Answer 1

I noticed this when my app crashed on an empty ‘Saved Photos’ album on any of my devices, or the simulator. If Saved Photos has photos in it the bug doesn’t happen. It is easy to replicate if you use Reset Data and Settings on the simulator, and leave your albums empty.

I’ve spent ages trying to find a workaround but I haven’t been able to. I think filing an iOS bug report is a real good idea.