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How to avoid rounding off in NSNumberFormatter

I am trying to have a number string with maximum 2 decimals precision, while rest decimals just trimmed off instead of rounding them up. For example:

I have: 123456.9964

I want: 123456.99 -> Just want to trim rest of the decimal places

What I have tried is:

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle: NSNumberFormatterDecimalStyle];
[numberFormatter setMaximumFractionDigits:2];
NSString *numberAsString = [numberFormatter stringFromNumber:[NSNumber numberWithFloat: 123456.9964]];
 NSLog(@"%@", numberAsString);

There is nothing to set rounding mode as "none". What else can I do to maintain Decimal style formatting along with trimmed decimal digits? Any help will be appreciated. Thanks.

like image 674
NightFury Avatar asked Mar 07 '13 05:03

NightFury


2 Answers

The following works for me:

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];
[numberFormatter setMaximumFractionDigits:2];
// optional - [numberFormatter setMinimumFractionDigits:2];
[numberFormatter setRoundingMode:NSNumberFormatterRoundDown];
NSNumber *num = @(123456.9964);
NSString *numberAsString = [numberFormatter stringFromNumber:num];
NSLog(@"%@", numberAsString);

The output is: 123,456.99

Part of your problem is the use of numberWithFloat: instead of numberWithDouble:. Your number has too many digits for float.

like image 114
rmaddy Avatar answered Oct 22 '22 18:10

rmaddy


you can use this

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setRoundingMode:NSNumberFormatterRoundDown];
[numberFormatter setMaximumFractionDigits:2];
NSString *numberAsString = [numberFormatter stringFromNumber:[NSNumber numberWithDouble: 123456.9964]];
NSLog(@"%@", numberAsString);
like image 24
Aravindhan Avatar answered Oct 22 '22 18:10

Aravindhan