Preventing decimals with NSNumberFormatter

问题

I have an NSNumberFormatter which I'm trying to use to generate a whole number of GBP (£) from an NSNumber. I keep getting two decimal places regardless of which incantation I try. My code is:

    NSNumberFormatter *fmtCurrency = [[[NSNumberFormatter alloc] init] autorelease];
    [fmtCurrency setNumberStyle: NSNumberFormatterCurrencyStyle];
    [fmtCurrency setGeneratesDecimalNumbers:FALSE];
    [fmtCurrency setCurrencyCode:@"GBP"];
    [fmtCurrency setCurrencySymbol:@"£"];
    txtTotal.text = [fmtCurrency stringFromNumber: result.Bill ]; // this is an NSNumber

回答1:

I think you want to call setMaximumFractionDigits with zero.

NSNumberFormatter *fmtCurrency = [[[NSNumberFormatter alloc] init] autorelease];
[fmtCurrency setNumberStyle: NSNumberFormatterCurrencyStyle];
[fmtCurrency setGeneratesDecimalNumbers:NO];
[fmtCurrency setCurrencyCode:@"GBP"];
[fmtCurrency setCurrencySymbol:@"£"];

NSNumber* myNumber = [NSNumber numberWithFloat:12.34];
NSString* myString = [fmtCurrency stringFromNumber:myNumber];
NSLog( @"the number is %@", myString );

[fmtCurrency setMaximumFractionDigits:0];
myString = [fmtCurrency stringFromNumber:myNumber];
NSLog( @"now it's %@", myString );  


2011-07-25 01:05:39.823 FormatterTest[841:707] the number is £12.34
2011-07-25 01:05:39.824 FormatterTest[841:707] now it's £12

回答2:

You can try the following

[fmtCurrency setGeneratesDecimalNumbers:NO];
[fmtCurrency setMaximumFractionDigits:0];

Get intValue from the NSNumber as suggested by @Praveen

回答3:

You need to extract the intValue from NSNumber.

回答4:

You could remove all the NSNumberFormatter (which is quite intensive) and just do:

txtTotal.text = [NSString stringWithFormat:@"£%d", result.Bill.intValue];

回答5:

Swift 4

    let formatter = NumberFormatter()
    formatter.maximumFractionDigits = 0

回答6:

format string to two decimals... (was what i was searching) adapted...

            float distance = //distance with many decimals...;

            NSNumberFormatter *numberFormatter = [[[NSNumberFormatter alloc] init] autorelease];
            [numberFormatter setMaximumFractionDigits:2];

            //new distance with two decimals
            NSNumber* myNumber = [NSNumber numberWithFloat:distance];

good luck

来源：https://stackoverflow.com/questions/6813095/preventing-decimals-with-nsnumberformatter

标签

iphone

ios

string-formatting

nsnumberformatter