iOS NSNumber transform

NSNumber to int
NSNumber *myNum;
int intValue = [ myNum  intValue];

Int to NSNumber
NSNumber number = [NSNumber numberWithInt:10];

Double to NSNumber
dobule dx = 1.1, double dy = 2.2
NSNumber *nsx = [NSNumber numberWithDouble:x];
NSNumber *nsy = [NSNumber numberWithDouble:y];

NSNumber to Double
NSNumber *ns, *ny;
double latitude  = [ns doubleValue];
double longitude = [ny doubleValue];

NSNumber to NSString
NSString *myString = [NSNumber stringValue];