Warning: Attempt to present ModalTableViewController on MainTableViewController which is already presenting (null)

Question

I have a problem with a popover. If I tap on a cell I will load a popover to select more details. Everything works fine, but when I press my cell again I receive every time the following message:

Warning: Attempt to present ModalTableViewController... on MainTableViewController... which is already presenting (null)

If I tap on another cell I will not get this Warning. Only if a tap the same row again.

I tried lots of things but I am not able to solve this problem. I load my popover with like this:

var popover: UIPopoverController!
var popoverContent: ModalTableViewController!

and on my cell tap:

popoverContent = self.storyboard.instantiateViewControllerWithIdentifier("ModalTableViewController") as ModalTableViewController

popoverContent.selectedQuestionID = indexPath!.row               
popover = UIPopoverController(contentViewController: popoverContent)
popover.delegate = self

popover.presentPopoverFromRect(currentCell.LabelCellTitle.frame, inView: currentCell.LabelCellTitle.superview, permittedArrowDirections: UIPopoverArrowDirection.Left, animated: true)

And to dismiss

func popoverControllerDidDismissPopover(popoverController: UIPopoverController!) {

    popover.dismissPopoverAnimated(false) // just to check

    self.popover = nil
    self.popoverContent = nil

}

Any ideas?

Edit:

If I check with:

if(self.popoverContent == nil) {

before opening it, I'll find out that it's not nil when I tap the same cell again.

Edit again:

I have the same problem if I create it with a little different setup:

Custom 1x1px Button. Connect popover with segue. On cell tap move button to cell and open popover.

So there is no code for opening the popover, only with storyboard editor.

I get the same error message (sometimes) just if I tap the same popover again.

Answer 1

I had this issue because I was trying to perform segue / present from within:

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex

I changed it to:

- (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex

and it fixed it!

Answer 2

I'm not on swift yet, but for Objective-C, I ended up wrapping the presentViewController call in a performSelector call.

-(void) present
{
    [self performSelector: @selector(ShowModalTableViewController) withObject: nil afterDelay: 0];
}

-(void) ShowModalTableViewController
{
    [self presentViewController: ctrlModalTableViewController animated: true completion: nil];
}