如果为0,则ios numberformatter currency删除尾随小数

25.00 => $25
25.43 => $25.43
25.4 => $25.40
0.00 -> $0

NSnumberFormatter *fmt = [[NSnumberFormatter alloc] init];
[fmt setnumberStyle:NSnumberFormatterCurrencyStyle];
[fmt setCurrencyCode:@"USD"];

NSnumberFormatter *fmt = [[NSnumberFormatter alloc] init];
[fmt setPositiveFormat:@"$0.##"];

我认为没有办法使用普通的NSnumberFormatter来做到这一点.您可以将最小和最大小数位数设置为0,仅用于格式化NSnumberFormatter子类中的整数：

@interface MyCurrencyFormatter : NSnumberFormatter
@end

@implementation MyCurrencyFormatter

- (id)init {
    if ((self = [super init])) {
        [self setnumberStyle:NSnumberFormatterCurrencyStyle]];
        [self setCurrencyCode:@"USD"];
    }
    return self;
}

- (NSString *)StringFromnumber:(NSnumber *)anumber {
    NSInteger minimumFractionDigits = [self minimumFractionDigits];
    NSInteger maximumFractionDigits = [self maximumFractionDigits];
    if ([self isInteger:anumber]) {
        [self setMinimumFractionDigits:0];
        [self setMaximumFractionDigits:0];
    }
    NSString *formattednumber = [super StringFromnumber:anumber];
    [self setMinimumFractionDigits:minimumFractionDigits];
    [self setMaximumFractionDigits:maximumFractionDigits];
    return formattednumber;
}

- (BOOL)isInteger:(NSnumber *)anumber {
    NSdecimal decimalValue = anumber.decimalValue;
    NSdecimalround(&decimalValue,&decimalValue,NSRoundDown);
    NSdecimalnumber *roundedValue = [[NSdecimalnumber alloc] initWithdecimal:decimalValue]
    return [anumber isEqualTonumber:roundedValue];    
}

@end

这也应该处理国际号码格式.

归功于this post以确定数字是否为整数.