title: UIPopOver from MKAnnotation callout
body: <p>i'm developing an application for iPad. I have a mapview with several annotations. I need to show a pop-over when the accessory callout method is called, so that the arrow of the popover will point towards the annotation. I am trying to use 'initWithRect' method of the popover, but i'm not getting the co-ordinates(the CGRect in view) of the annotation correctly. How can i get the co-ordinates of an annotation? I need to find out the location of that annotation in the view. </p>