如何修剪小数点后的零 [英] How to trim zeros after decimal point

问题描述

  trig = [currentVal] 
我尝试在小数点后修剪零，如下所示。 doubleValue]; 
 trig = trig / 100; 
 NSNumberFormatter * formatter = [[NSNumberFormatter alloc] init]; 
 [formatter setMaximumFractionDigits：0]; 
 display.text = [formatter stringFromNumber：[NSNumber numberWithDouble：trig]]; 
  

小数点后仍未显示数字。

这里 currentVal 是我进入的号码。

例如，如果我通过trig= 123（在执行trig / 100之后，最初的trig= 123我想显示1.23，但显示为1.23000000）。

解决方案

从文档，它看起来像 setFractionDigits： / code>只是用于转换的方式。

最好的办法是在格式化之前将数字转换为整数，例如

  double converted = round（trig）; // man round for docs 
  

您也可以使用 stringWithFormat ： of NSString ，但是你将失去所有的本地化优势 NSNumberFormatter 。

I am trying to trim zeros after a decimal point as below but it's not giving desired result.

trig = [currentVal doubleValue];
trig = trig/100;
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setMaximumFractionDigits:0];
display.text = [formatter stringFromNumber:[NSNumber numberWithDouble:trig]];

The number is still being displayed without trimming zeros after the decimal point.

Here currentVal is the number I am entering.

For example if i pass "trig" = 123 (Initially "trig" = 123 after doing trig/100 i want to display 1.23 but it is displaying as 1.23000000).

解决方案

From the documentation, it looks like setFractionDigits: is only for converting the other way.

The best thing to do is probably to convert your number to an integer before formatting it e.g.

 double converted = round(trig); // man round for docs

You can use also the formatting functions of stringWithFormat: of NSString, but then you will lose all the localisation advantages you get with NSNumberFormatter.

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