Handling emoji correctly

gistfile1.txt

// I take a string from a text field (which includes emoji) and apply this to it so that my JSON parser doesn't freak out when it comes back to me.
NSData *stringData = [message dataUsingEncoding:NSNonLossyASCIIStringEncoding];
NSString *safeString = [[NSString alloc] initWithData:stringData encoding:NSUTF8StringEncoding];

// I try to draw the string I get back from the server (I sent it safeString from above). 
// When I draw it I end up getting text like this drawn:

//       Test emoji \ud83d\ude03