NSDecimalNumber zeros following decimal point (iPhone SDK)

I have the following code

(...)
numberStyle = [NSDecimalNumberHandler decimalNumberHandlerWithRoundingMode:NSRoundPlain
                                                                     scale:2
                                                          raiseOnExactness:NO
                                                           raiseOnOverflow:NO
                                                          raiseOnUnderflow:NO
                                                       raiseOnDivideByZero:NO];

strThree = textFieldThree.text;
strThree = [strThree stringByReplacingOccurrencesOfString:@"." withString:@""];

fieldOneDNa = (NSDecimalNumber *)[NSDecimalNumber decimalNumberWithString:strThree];
oneHundred = (NSDecimalNumber *)[NSDecimalNumber decimalNumberWithString:@"100"];
fieldOneDN = [fieldOneDNa decimalNumberByDividingBy:oneHundred
                                       withBehavior:numberStyle];

firstStepReturn = [fieldOneDN stringValue];开发者_JAVA技巧
textFieldThree.text = firstStepReturn;
(...)

I would like to be able to have firstStepReturn have 2 digits following the decimal point even if they are .00 or .*0. For example, if 323.390 was inputted into the textfield "textFieldThree", it would be processed and returned to the textfield as 3233.90. At the moment, it is displaying as 3233.9.

Any help would be greatly appreciated.

NSDecimalNumber subclasses NSNumber so you just need to use NSNumberFormatter

 NSDecimalNumber * dn = [NSDecimalNumber decimalNumberWithString:@"1234.5"];
 NSNumberFormatter * nf = [[NSNumberFormatter alloc] init];
 [nf setMinimumFractionDigits:2];
 [nf setMaximumFractionDigits:2];
 NSString *ns  = [nf stringFromNumber:dn];

Simples

Why not use textFieldThree.text=[NSString stringWithFormat:@"%.2f",[fieldOneDN floatvalue]];

(or something similar - sorry I'm on a PC right now so can't test this)