-[UIPopoverController dealloc] reached while popover is still visible - objective-c

Question

I have a class (ViewOpenAppointments) where I create and display a UIPopover. This is the code to define the popover in my .h file:
#interface ViewOpenAppointments : UIView {
}
#property (nonatomic, retain) UIPopoverController *popoverController;
-(void)createOpenAppointmentsPopover: (UIButton *) obViewOpenAppts;
#end
I have a check in the code that if the popover is visible, dismiss it. This is the code:
// create popover
UIViewController* popoverContent = [[UIViewController alloc] init];
// UIView *popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 650, 416)];
ViewOpenAppointments *popoverView = [[ViewOpenAppointments alloc] initWithFrame:CGRectMake(0, 0, 650, 416)];
popoverView.backgroundColor = [UIColor whiteColor];
popoverContent.preferredContentSize = CGSizeMake(650.0, 416.0);
// create the popover controller
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
popoverController.delegate = (id)self;
[popoverController setPopoverContentSize:CGSizeMake(650, 416) animated:NO];
if ([popoverController isPopoverVisible]) {
[popoverController dismissPopoverAnimated:YES];
}
[popoverController presentPopoverFromRect:CGRectMake(650, 416, 10, 50) inView: obViewOpenAppts
permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
The problem is that the code to dismiss the popover is never hit, which means it's not visible. But I still get the error message (described in the question title).
What am I doing wrong?

Answer 1

Here is a complete popover management example:
#interface ViewController () <UIPopoverControllerDelegate>
#property (nonatomic, strong) UIPopoverController* currentPop;
#end
#implementation ViewController
-(IBAction)doPopover1:(id)sender {
Popover1View1* vc = [[Popover1View1 alloc] initWithNibName:#"Popover1View1" bundle:nil];
UIPopoverController* pop = [[UIPopoverController alloc] initWithContentViewController:vc];
self.currentPop = pop;
[pop presentPopoverFromBarButtonItem:sender
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
pop.passthroughViews = nil;
// make ourselves delegate so we learn when popover is dismissed
pop.delegate = self;
}
- (void)popoverControllerDidDismissPopover:(UIPopoverController *)pc {
self.currentPop = nil;
}
By checking self.currentPop you can make sure you don't present two popovers at once (illegal anyway).