Popovers cannot be presented from a view which does not have a window

Question

What does this error indicate:

\"Popovers cannot be presented from a view which does not have a window.\"

Answer 1

I replaced

[actionSheet showFromBarButtonItem:self.navigationController.navigationItem.leftBarButtonItem animated:YES];

with

[actionSheet showInView:self.view];

Answer 2

yes, you are right but still we can add subview from parent class in it. so it can be represented from a view which have a window:

[popoverController.contentViewController.view addSubview:mySubView];

Answer 3

There will be a view from which you asks to display your popover.The reason for this error is because you didn't made this view as a subview of the window.

 [self.view addSubview:displayPopOverVC];

where displayPopOverVC is the view controller from which the popOver appears

Answer 4

i had the same problem, after adding PresentPopOver in viewDidAppear this was solved

- (void) viewDidAppear:(BOOL)animated{
     CGRect popoverRect = screenBounds;         
     popoverRect.size.width = MIN(popoverRect.size.width,0) ;
     popoverRect.origin.x  = screenBounds.origin.x;

     [popoverController
     presentPopoverFromRect:popoverRect
     inView:self.view
     permittedArrowDirections:UIPopoverArrowDirectionAny
     animated:YES];
}

this was happening as inView:self.view should be called after viewDidLoad as suggested by @hey68You and MobiMaciek..

Answer 5

There are many ways to get to this error. Basically you need to wait to call the presentPopover command until your calling view is added to a window. I did it this way.

- (void)viewDidAppear:(BOOL)animated
{
    [self methodThatDisplaysPopOver];
}

My presentPopoverFromRect call is inside my methodThatDisplaysPopOver function.

You could protect every presentPopover call like MobiMaciek suggests with this.

if (self.view.window != nil)
    [popoverController presentPopoverFromRect:CGRectMake(10, 10, 100, 100) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

However, I think it would be better to understand when self.view.window gets assigned and make sure that you present you popover after the view has a window.

Answer 6

Just encountered this issue. Turned out that the inView: parameter was using an IBOutlet that wasn't connected in IB. Thus, an attempt was made to launch the popover in nil. That doesn't work.

So, make sure you are using a valid view.