Display an address on a map on the iphone

If I supply an address as a NSString. How can I use mapkit to show me a map with that location centered and a push pin showing that address? What's the easiest way to do this?

EDIT: Is there a way 开发者_如何学Pythonto call the built-in Maps app to do that for me?

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You'll need to forward geocode the address to obtain GPS coordinates. This data is available from third parties like Google via their Geocoding API. Here's a tutorial on forward geocoding using Google APIs.

Take note of their terms of use.