map - How to get Latitude and longitude from typed address by a user in Ios 6 -

i new in ios. , learning mapkit , corelocation. have 2 view controllers in program , in first view controller there text field there user can type address. , button. after fill address if user tap on button redirect second view controller map view controller. there 2 annotation. 1 user's current location , user's typed address. can please tell me how lat, long user's typed address , show annotation on map view lat long.

thanks in advance.

here code

#import <mapkit/mapkit.h> #import <corelocation/corelocation.h>  +(cllocationcoordinate2d) getlocationfromaddressstring:(nsstring*) addressstr {      double latitude = 0, longitude = 0;     nsstring *esc_addr =  [addressstr stringbyaddingpercentescapesusingencoding:nsutf8stringencoding];     nsstring *req = [nsstring stringwithformat:@"http://maps.google.com/maps/api/geocode/json?sensor=false&address=%@", esc_addr];     nsstring *result = [nsstring stringwithcontentsofurl:[nsurl urlwithstring:req] encoding:nsutf8stringencoding error:null];     if (result) {         nsscanner *scanner = [nsscanner scannerwithstring:result];         if ([scanner scanuptostring:@"\"lat\" :" intostring:nil] && [scanner scanstring:@"\"lat\" :" intostring:nil]) {             [scanner scandouble:&latitude];             if ([scanner scanuptostring:@"\"lng\" :" intostring:nil] && [scanner scanstring:@"\"lng\" :" intostring:nil]) {                 [scanner scandouble:&longitude];             }         }     }     cllocationcoordinate2d center;     center.latitude = latitude;     center.longitude = longitude;     return center;  } 

then call method

coordinates = [self getlocationfromaddressstring:@"address"];