CODEWITHSUNDEEP
objective-ccocoansnumberformatter
Iván Peralta
Iván Peralta

Reputation: 851

NSNumberFormatter conversion remove the decimal for small values

Our quality-assurance team detect a defect. When they write 0.095 or 0,095 in a currency field, the NSNumberFormatter converts the content to 95.

This is the code we're using:

+ (NSNumber *) getNumberWithDecimalFromString:(NSString*) theSource
{
    if ([TSCommons isEmpty:theSource])
        return [[NSNumber alloc] initWithInt:0];

    NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
    [formatter setNumberStyle:NSNumberFormatterDecimalStyle];

    if ([theSource rangeOfString:@","].location != NSNotFound) {
        [formatter setDecimalSeparator:@","];
        [formatter setCurrencyDecimalSeparator:@"."];
    } else if ([theSource rangeOfString:@"."].location != NSNotFound) {
        [formatter setDecimalSeparator:@"."];
        [formatter setCurrencyDecimalSeparator:@"."];
    }
    NSNumber *tmp = [formatter numberFromString:theSource];

    [formatter release];
    return [tmp retain];
}

The locale is es_ES

Any idea about this unexpected behavior?

To introduce more information about this problem, because come back again after the last XCode update I prepared a test

- (void) testNumberFormatter
{
    NSLog(@"%f",[[TSCommons getNumberWithDecimalFromString:@"41,1"] doubleValue]);
    NSLog(@"%f",[[TSCommons getNumberWithDecimalFromString:@"41,12342"] doubleValue]);
    NSLog(@"%f",[[TSCommons getNumberWithDecimalFromString:@"41,12"] floatValue]);
    NSLog(@"%f",[[TSCommons getNumberWithDecimalFromString:@"41,123"] floatValue]);
    NSLog(@"%f",[[TSCommons getNumberWithDecimalFromString:@"41,1234"] floatValue]);
    NSLog(@"%f",[[TSCommons getNumberWithDecimalFromString:@"41,1234234"] doubleValue]);
}

The result on the Console is the following:

41.100000

41.123420

41.119999

41123.000000

41.123402

41.123423

Thanks!!

Upvotes: 1

Views: 279

Answers (1)

Mr Bonjour
Mr Bonjour

Reputation: 3400

 NSString* theSource = @"0.095";
        NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
        [formatter setNumberStyle:NSNumberFormatterDecimalStyle];

        if ([theSource rangeOfString:@","].location != NSNotFound) {
            [formatter setDecimalSeparator:@","];
            [formatter setCurrencyDecimalSeparator:@"."];
        } else if ([theSource rangeOfString:@"."].location != NSNotFound) {
            [formatter setDecimalSeparator:@"."];
            [formatter setCurrencyDecimalSeparator:@"."];
        }
        NSNumber *tmp = [formatter numberFromString:theSource];
        NSLog(@"get Number %@ - %lf %lf", tmp, [theSource doubleValue], [tmp floatValue]);

// output get Number 0.095 - 0.095000 0.095000

Upvotes: 0

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