g-Off.net | Geoffrey Foster » Objective-C http://g-Off.net Fri, 30 Oct 2009 00:12:45 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 CLLocation forward GeoLocation method http://g-Off.net/software/cllocation-forward-geolocation-method http://g-Off.net/software/cllocation-forward-geolocation-method#comments Mon, 17 Aug 2009 03:54:42 +0000 gfoster http://g-Off.net/?p=93 iPhone Maps App iconThe new MapKit framework for the iPhone OS 3.0 provides a very easy to use way of doing reverse geolocation (getting address information by providing latitude and longitude). But, it would seem that there is nothing built in for getting latitude and longitude values for a given address. Luckily, Google to the rescue! The following code-snippet is a category on CLLocation with the one method

- (CLLocation *)locationUsingForwardGeoLocation:(NSString *)address;

which takes an address string, and, using Google maps API, does a lookup and returns a CLLocation object for the given address. If no address could be found then nil is returned.

Usage is very simple:

CLLocation *ottawa = [CLLocation locationUsingForwardGeoLocation:@"Ottawa, Ontario"];
// Do whatever with the returned CLLocation object

CLLocation+ForwardGeoLocation.h View
CLLocation+ForwardGeoLocation.m View

Report any bugs or issues here

Credit for some of the code and the original idea go to http://mithin.in/2009/06/22/using-iphone-sdk-mapkit-framework-a-tutorial/

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