How to properly display currency iPhone/Objective-C

Question

I am trying to properly display properly formatted currencies from long values. I am using NSNumberFormatter however it seems to be cutting off my decimal places where the cents would go.

For example, if I have a long value of 1203 (cents) I want it to have a fixed point format (like 12.03). Here is what I have done:

NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
formatter.numberStyle = NSNumberFormatterCurrencyStyle;
formatter.currencyCode = "USD";
formatter.multiplier = [NSNumber numberWithDouble:0.01];
long currencyAmount = 1203;
NSNumber *number = [NSNumber numberWithLongLong:currencyAmount];
[label setText:[formatter stringFromNumber:number]];

I am getting this output $12.00 but I want $12.03

score 2 · Answer 1 · edited May 23 '17 at 11:56

2

To think of an integer cut-off bug inside of NSNumberFormatter is crazy speculation but have you tried the default multiplier of one and dividing your currency amount after conversion to float by 100 yourself?

EDIT: For this workaround the following post suggests the use of NSDecimalNumber to avoid rounding problems. NSNumberFormatter to format currency not working for floats

edited May 23 '17 at 11:56

Community

1
1

answered Jan 17 '13 at 23:16

s.bandara

5,636
1
21
36

Yea I got that solution working but I wanted to figure out if there was a built in way within the NSNumberFormatter to do this automatically. – thunderousNinja Jan 17 '13 at 23:19
Okay, sorry. Definitely interesting question. +1 – s.bandara Jan 17 '13 at 23:21
I found a solution. Will post the response now. – thunderousNinja Jan 17 '13 at 23:39
And how is that different...? – s.bandara Jan 17 '13 at 23:51
http://www.cimgf.com/2008/04/23/cocoa-tutorial-dont-be-lazy-with-nsdecimalnumber-like-me/ – vikingosegundo Jan 18 '13 at 00:00

score 1 · Accepted Answer · answered Jan 17 '13 at 23:46

I figured out the answer. This will properly format a long/long long value to a currency.

NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
formatter.numberStyle = NSNumberFormatterCurrencyStyle;
formatter.currencyCode = "USD";
long currencyAmount = 1203;
NSDecimalNumber *wrappedCurrencyAmount = [NSDecimalNumber decimalNumberWithMantissa:currencyAmount exponent:-2 isNegative:NO];
[label setText:[formatter stringFromNumber:wrappedCurrencyAmount]];

How to properly display currency iPhone/Objective-C

2 Answers2