iphone - Using Current Location from Location Manager in a Google Maps openURL? -

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been looking while today can't seem head around how users current location google maps url open google maps app directions populated.

i've taken code tutorial , added app. need "start" lat/lng below ibaction open google maps app.

- (void)locationupdate:(cllocation *)location {     // lat/lng of user (needs sent ibaction btndirections)     cllocationcoordinate2d start = { location.coordinate.latitude, location.coordinate.longitude }; }

the below ibaction "get directions" button.

- (ibaction) onbuttonclick:(id) sender {     if(sender == btndirections) {         cllocationcoordinate2d destination = { 52.48306771095311, -1.8935537338256836 };                     nsstring *googlemapsurlstring = [nsstring stringwithformat:@"http://maps.google.com/?saddr=%1.6f,%1.6f&daddr=%1.6f,%1.6f",                                          newlocation.coordinate.latitude, newlocation.coordinate.longitude, destination.latitude, destination.longitude];         [[uiapplication sharedapplication] openurl:[nsurl urlwithstring:googlemapsurlstring]];           } }

i have done in app, view included map showing user location allowed me lat/lng easily.

thanks in advance.

simply pass "current+location" parameter google maps application:

http://maps.google.com/maps?saddr=current+location&daddr=heathrow+airport+london

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