限制双到小数点后两位

本文介绍了限制双到小数点后两位的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我如何实现从双下面的转换为字符串：

1.4324 =＆GT; 1.439.4000 =＆GT; 9.443.000 =＆GT; 43

即。我要四舍五入到的小数位数，但不希望任何尾随零，也就是我不想

9.4 =＆GT; 9.40（错）43.000 =＆GT; 43.00（错）

所以这code，我现在不工作，因为它显示多余的零：

[的NSString stringWithFormat：@％2F，总]

解决方案

使用NSNumberFormatter.见的格式化编程指南上Number格式化的。

How do I achieve the following conversion from double to a string:

1.4324 => "1.43" 9.4000 => "9.4" 43.000 => "43"

i.e. I want to round to to decimal places but dont want any trailing zeros, ie i dont want

9.4 => "9.40" (wrong) 43.000 => "43.00" (wrong)

So this code which I have now doesn't work as it displays excess zeros:

[NSString stringWithFormat: @"%.2f", total]

解决方案

Use NSNumberFormatter. See the Data Formatting Programming Guide's chapter on Number Formatters.