Convert NSString to and from NSNumber in XCode-

Convert String to Number in XCode-

Variable declare-

NSNumberFormatter * numValue = [[NSNumberFormatter alloc] init];

Set the number variable to contain Decimal value.
[numValue setNumberStyle:NSNumberFormatterDecimalStyle];

Get the string value from string-
NSNumber * myNumber = [numValue numberFromString:@"7"];

Release memory-
[myNumber release];

Convert Number to String in XCode-

NSString *myStr = [NSString stringWithFormat:@"%d",intValueHere];

                                         

That’s it  Enjoy J