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

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.