Question

self.numberFormatter = [[NSNumberFormatter alloc] init];
[self.numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
[self.numberFormatter setCurrencySymbol:@""];
[self.numberFormatter setLocale:[NSLocale currentLocale]];

//In DataManager sharedClass .h 
- (void)setupCapital:(float)Capital;
- (float)readCapital;
(NSString*)formatCapital:(NSNumber *)Capital;

// In DataManager sharedClass .m
@property (assign, nonatomic) float theCapital;
- (NSString *) formatCapital:(NSNumber *)Capital {
return [self.numberFormatter stringFromNumber:Capital];
}

- (void)formatCapital:(float)Capital {
self.theCapital = Capital;
}

- (float) readCapital {
return self.theCapital;
}

// write the number
 float numberDecimal = [[DataManager sharedClass] readCapital];
self.labelCapital.text = [[DataManager sharedClass] formatCapital:[NSNumber numberWithFloat:numberDecimal]];

为什么我插入123456,89我正确地在labelCapital中有值123.456,89

如果我插入1234567,89，我将改为labelCapital 1.234.567,88

如果我插入123456789,89，我会改为labelCapital 123.456.792,00

任何提示？

Answer 1

我已经解决了使用该代码的问题：

self.numberFormatter = [[NSNumberFormatter alloc] init];
[self.numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];
[self.numberFormatter setGroupingSize:3];
[self.numberFormatter setCurrencySymbol:@""];
[self.numberFormatter setLocale:[NSLocale currentLocale]];
[self.numberFormatter setMaximumFractionDigits:2];

并将float更改为double

我还添加了最后一行，结果只有2个十进制数

Answer 2

您可以使用这样的单个函数将字符串变量转换为货币格式：

  - (NSString *)convertToCommaSeparated:(NSString *)inputAmount{
    NSDecimalNumber *someAmount = [NSDecimalNumber decimalNumberWithString:inputAmount];
    NSNumberFormatter *currencyFormatter = [[NSNumberFormatter alloc] init];
    [currencyFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
    [currencyFormatter setCurrencyCode:@"USD"];
    [currencyFormatter setMaximumFractionDigits:2];
    [currencyFormatter setFormat:@"#,##0.00"];
    return [currencyFormatter stringFromNumber:someAmount];
}

注意：输入不应该有逗号（，）。你应该在传递给这个函数之前删除逗号。

用千位分隔符和2位小数格式化长数字（浮点数）

2 个答案: