Objective c NSNumberFormatter货币删除尾随零

我想要45.50这样的价格，但我不想要45.00这样的价格。如何避免这种情况？

请执行以下操作：

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

现在像这样：

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;
}

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 : 12.74 
INPUT : 12.00 OR 12.000

  NSString *inputString=[NSString string];


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


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

输入字符串：12 更新答案：关于他的评论问题

投入：12.30

我假设他会在一些UI中显示这个值，比如UILabel，…不是为了计算

 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];
}
}

NSString*inputString=[NSString]；
inputString=[NSString stringWithFormat:@“%.4g”，12.30f]；
NSArray*arr=[inputString组件由字符串分隔：@.”；
如果（[arr计数]>=2）{
NSString*secondStr=[arr objectAtIndex:1]；
如果（[secondStr length]如果你刚刚经历了一次快速而肮脏的黑客攻击

// 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：这种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。
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。输出将是
$50.50
。对于
amount=@（50.0）
将是
$50

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]);