Question

我想格式化价格如45.50，但我不希望价格像45.00。我怎么能避免这个？

Answer 1

我是这样做的：

NSNumber *amount = @(50.5);
NSNumberFormatter *currencyFormat = [[NSNumberFormatter alloc] init];
[currencyFormat setNumberStyle:NSNumberFormatterCurrencyStyle];
[currencyFormat setLocale:[NSLocale currentLocale]];

if (trunc(amount.floatValue) == amount.floatValue) {
    [currencyFormat setMaximumFractionDigits:0];
} else {
    [currencyFormat setMaximumFractionDigits:2];
}

NSLog(@"%@", [currencyFormat stringFromNumber:amount]);

我喜欢这个简单的解决方案。输出将为$50.50。而amount = @(50.0)将为$50

Answer 2

这样做：

NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
[formatter setMaximumFractionDigits:2];
[formatter setRoundingMode: NSNumberFormatterRoundUp];
NSString *numberString = [formatter stringFromNumber:[NSNumber numberWithFloat:22.368511]];
NSLog(@"Result...%@",numberString);//Result 22.37

现在跟踪不需要的东西：

NSString* CWDoubleToStringWithMax2Decimals(double d) {
 NSString* s = [NSString stringWithFormat:@"%.2f", d];
 NSCharacterSet* cs = [NSCharacterSet characterSetWithCharacterInString:@"0."];
 NSRange r = [s rangeOfCharacterInSet:cs
                             options:NSBackwardsSearch | NSAnchoredSearch];
 if (r.location != NSNotFound) {
  s = [s substringToIndex:r.location];
 }
 return s;
}

Answer 3

float myOriginalPrice = 45.50;
    CGFloat mod = fmod(myOriginalPrice, 1);
    if (mod == 0){
        mod = (int)myOriginalPrice;
        NSLog(@"%.0f", mod);


    } else {
         NSLog(@"%f", myOriginalPrice);
    }

Answer 4

  INPUT : 12.74 OR 12.745

NSString *inputString=[NSString string];


inputString=[NSString stringWithFormat:@"%.4g",12.74f];


NSLog(@"inputString : %@ \n\n",inputString);

输出：

  inputString : 12.74 
INPUT : 12.00 OR 12.000

  NSString *inputString=[NSString string];


 inputString=[NSString stringWithFormat:@"%.4g",12.00f];


 NSLog(@"inputString : %@ \n\n",inputString);

输出：

inputString：12 更新的答案：对于他的评论问题

INPUT：12.30

我在这里假设他将在某些UI中显示此值，例如UILabel，.....不用于计算。

 NSString *inputString=[NSString string];


 inputString=[NSString stringWithFormat:@"%.4g",12.30f];


 NSArray *arr=[inputString componentsSeparatedByString:@"."];


 if ([arr count] >= 2) {

    NSString *secondStr=[arr objectAtIndex:1];

if ([secondStr length]<2) {

    inputString=[NSString stringWithFormat:@"%@0",inputString];
}
}

NSLog（@“inputString：％@ \ n \ n”，inputString）; 输出：

inputString：12.30

Answer 5

如果你只是在一个非常快速和肮脏的黑客之后。。

// Get the price as a string
NSString *priceString = [NSString stringWithFormat:@"%2.2f", priceFloat];

// Trim if needed
if ([priceString hasSuffix:@".00"])
    priceString = [priceString substringToIndex:priceString.length-3];

注意：此方法不适用于本地化内容，即在欧洲，小数点分隔符是逗号，因此您将看到45,00，而不是45.00。

NSNumberFormatter货币删除尾随零

5 个答案: