UIPopoverController trouble - objective-c

Question

I'm trying to create a popover with the following code:
//.h
#interface LoginViewController : UIViewController <UIPopoverControllerDelegate>
....
#end
//.m
- (IBAction)popoverTest:(id)sender
{
UIViewController *popoverContent = [[UIViewController alloc] init];
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 300)];
UILabel *nameLabel = [[UILabel alloc] init]; //edited, fixed UILabel allocation
nameLabel.text = #"Person's name";
[nameLabel sizeToFit];
nameLabel.frame = CGRectMake(10, 10, nameLabel.frame.size.width, nameLabel.frame.size.height);
[myView addSubview:nameLabel];
popoverContent.view = myView;
popoverContent.contentSizeForViewInPopover = CGSizeMake(300, 300);
UIPopoverController *popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
popoverController.delegate = self;
[popoverController presentPopoverFromRect:((UIButton *)sender).frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
NSLog(#"ran all code");
}
I created a UIView, put a label as a subview and then assigned my view to the UIViewController.view. Then I created a popover controller, sized the popover controller, set the delegate and presented it from the button's frame.
I receive a SIGABRT and the app crashes.
Is there something I'm missing?
EDIT: I fixed the UILabel allocation. The problem is always there.

Answer 1

Your code is quite strange.
For example why do you create a view and do you add it to the content view of your popover?
Then, you have to make attention to memory leaks. There a lot of them in your code.
That said, here a simple example for display a UIViewcontroller within a UIPopoverController.
- (IBAction)yourAction:(id)sender
UIButton* senderButton = (UIButton*)sender;
UIViewController* yourController = [[UIViewController alloc] init];
UIPopoverController* pop = [[UIPopoverController alloc] initWithContentViewController:yourController];
pop.delegate = self;
pop.popoverContentSize = CGSizeMake(300, 300);
self.popover = pop;
[pop presentPopoverFromRect:senderButton.bounds inView:senderButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
pop.passthroughViews = nil;
[yourController release];
[pop release];
}
where self.popover is a #property with a retain policy. In this manner in UIPopoverControllerDelegate methods (or wherever you want), you can release your popover and/or dismiss it.
Hope it helps.
P.S. Check the code because I've written by hand.
Edit
Usually when you create a popover, its content view controller is or a custom UIViewController or a UINavigationController (in this case you want to take advantage of its navigation bar).
For example, instead of the simple UIViewController, you could create a custom one
//.h
#interface CustomUIViewController : UIViewController
#end
//.m
#implementation CustomUIViewController
// other code here...
- (void)viewDidLoad
{
// here you are sure that the view has been loaded in memory (alternatively override loadView method), so
UIView* greenView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 300)];
green.backgroundColor = [UIColor greenColor];
[self.view addSubview:greenView];
[greenView release];
}
#end
and use it within a a popover
- (IBAction)yourAction:(id)sender
UIButton* senderButton = (UIButton*)sender;
CustomUIViewController* yourController = [[CustomUIViewController alloc] init];
// same as before...
}

Answer 2

solved my issue from this question.
short answer: ARC doesn't retain the UIPopoverController.
i made it an instance variable and works just fine.

Answer 3

The problem seems to be the following:
UILabel *nameLabel;
nameLabel.text = #"Person's name";
nameLabel is uninitialized. It points to random memory, and when calling -setText: through the text-property, your application crashes.
Apart from this, you have a few memory leaks. Remember: If you call alloc, you have to release it somewhere.
(I'm not sure how this works with the new automatic alloc/release).