get address from reverse geocoding

in my application, I got a map that show the location of the user. But I also need to get the ex开发者_JS百科act address of where he is and put it in a string.

How does it work?

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Use MKReverseGeocoder. Look at the Apple sample app CurrentAddress.
The placemark object passed into didFindPlacemark has the address fields which you can put into a string.