使用NSNumberFormatter防止小数 [英] Preventing decimals with NSNumberFormatter

问题描述

我有一个NSNumberFormatter，我试图用来从NSNumber生成一定数量的GBP（£）。无论我尝试哪种咒语，我都会得到两位小数。我的代码是：

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

推荐答案

我想你想要调用setMaximumFractionDigits为零。

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

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