iOS how to display a mini map in Info after clicking disclosure from annotation

[tranvutuan]

After clicking on the disclosure button from an annotation, you will end up with a View called Info. At this screen, on the top left corner, there is a small images which is a snapshot of your current location. Does anybody know how to get the snapshot from the map and display in Info screen
There is an image so that you can easily know what I am talking about
Please help, all answers are welcomed here.