CODEWITHSUNDEEP
iosnsnumberformatter
Dave
Dave

Reputation: 95

NSNumberFormatter not working correctly

My code is:

NSString *price = @"0.29000";
NSNumberFormatter *f = [[NSNumberFormatter alloc] init];
[f setNumberStyle:NSNumberFormatterDecimalStyle];
[f setUsesSignificantDigits:YES];
[f setMaximumFractionDigits:2];
[f setMinimumFractionDigits:2];

NSNumber * priceNumber = [f numberFromString:price];

[f release];

NSLog(@"priceNumber:%@", priceNumber);

The result is:

priceNumber:0.2899999999999999

Whats going on here? Why not 0.29?

Upvotes: 1

Views: 496

Answers (1)

Luiz Carlos Querino Filho
Luiz Carlos Querino Filho

Reputation: 765

You can use the NSDecimalNumber class to avoid precision differences like this. With it, you create your NSDecimalNumber object directly from the NSString, without the need of the NSNumberFormatter:

NSString *price = @"0.29000";
NSDecimalNumber *priceNumber = [NSDecimalNumber decimalNumberWithString:price];
NSLog(@"priceNumber:%@", priceNumber);

However, if you want to do custom formatting to this NSDecimalNumber, you may use NSNumberFormatter as well.

Upvotes: 2

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