Popover's & their delegate for iPads

The following code is a simple implementation of a popover using a separate view controller & xib file.  First the instantiation & display code;
    InfoViewController *popoverView = [[InfoViewController alloc] init];
    popoverView.delegate = self; 
// Creates the popoverController object
    infoPopover = [[UIPopoverController alloc] initWithContentViewController:popoverView];
    [infoPopover setDelegate:self];
    [infoPopover presentPopoverFromRect:CGRectMake(512, 200, 10, -30) inView:self.view permittedArrowDirections:0 animated:NO];
    [infoPopover setPopoverContentSize:CGSizeMake(400, 500)];

and then instructions;
in PopoverViewController
the .xib file

• in the view change the status bar = None, so that you can resize the screen
• add controls as you like

the .h file:

• add IBOutlet IBActions to match the xib file
• connect them to the xib objects
• add delegate protocol & method definitions at the bottom of the file
• add the delegate property using assign & id

.m file:

• synthesize & release the popover controls

In the delegate 
the .h file

• add the conforms to
• add a UIPopoverController property use assign for the property
• Add an IBAction show button to display the popover

the .m file

• Add the delegate's methods

See ZenDesk for a nice implementation