How do I draw custom "Callout Bubbles" (the place name transparent-gray overlay) in an iPhone application using non-google maps?

I'm building an iPhone application with a map inside (using route-me, not MapKit).

I have some markers on the m开发者_开发百科ap, and I want to have an overlay - similarly to the google maps one - that appears once you click a marker:

A black - a bit transparent - overlay, with a button inside, and a little triangle pointing to the marker the overlay is referencing.

Thank you.

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It looks like these things are called 'callout bubbles'. Apple has a MapCallouts sample that shows you how to customize them.

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Read the quartz2d docu from Apple. They explain in detail how to create custom views.