Strange Error With UIPopoverController - objective-c

Question

I'm trying to use UIImagePickerController to grab a photo from the users Photos on their iPhone / iPad. This code works just fine for iPhone, but when I run it on iPad, the debugger gives me the message "Terminating app due to uncaught exception 'NSGenericException', reason: '-[UIPopoverController dealloc] reached while popover is still visible.". I'm very new to Objective-C, so I'm unsure of whats causing this, I do not dealloc anything and I have ARC turned on. Here is my code:
ViewController.m
#import "PhotoViewController.h"
#implementation PhotoViewController
#synthesize grabButton;
#synthesize image;
#synthesize imgPicker;
- (IBAction)grabImage {
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:imgPicker];
[popover presentPopoverFromRect:self.image.bounds inView:self.image permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
} else {
[self presentModalViewController:imgPicker animated:YES];
}
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
image.image = img;
[[picker parentViewController] dismissModalViewControllerAnimated:YES];
}
- (void)viewDidLoad
{
self.imgPicker = [[UIImagePickerController alloc] init];
self.imgPicker.allowsImageEditing = YES;
self.imgPicker.delegate = self;
self.imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}

Answer 1

UIPopover is an ugly patchwork beast of an object. It must be a strong property and an iVar to ensure that Dealloc isn't reached prematurely. Add this in the .h Like so:
#interface MyClass: NSObject {
UIPopover *_popover;
}
#property (nonatomic, strong) UIPopover * popover;
//.m
#synthesize popover = _popover;
When you instantiate the popover, assign it to either the property or the instance:
self.popover = [[UIPopoverController alloc] initWithContentViewController:imgPicker];
or
_popover = [[UIPopoverController alloc] initWithContentViewController:imgPicker];