Question

I can’t seem to convert two lat and LNG to a string. By the time I convert to degrees and back to a string I get large numbers like 999737 for what should be 2 miles or less away.

OK works!

Answer 1

Here is how you can convert between double -> string & back from string -> double

//Defining Latitude & Longitude    
NSNumber *latitude = [NSNumber numberWithDouble:31.5497226715];
NSNumber *longitude = [NSNumber numberWithDouble:74.3436126709];
NSLog(@"Origional > Lat: %.10f, Lng: %.10f", [latitude doubleValue], [longitude doubleValue]);

//Conversion to string
NSString *latitudeStr = [latitude stringValue];
NSString *longitudeStr = [longitude stringValue];
NSLog(@"String > Lat: %@, Lng: %@", latitudeStr, longitudeStr);


//String to double
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];

NSNumber *latitudeFromStr = [numberFormatter numberFromString:latitudeStr];
NSNumber *longitudeFromStr = [numberFormatter numberFromString:longitudeStr];

[numberFormatter release];

NSLog(@"Back from string > Lat: %.10f, Lng: %.10f", [latitudeFromStr doubleValue], [longitudeFromStr doubleValue]);