将一个小数限制为两位小数

Question

如何实现从double到字符串的以下转换:

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

即我想要舍入到小数位但不想要任何尾随零,即我不想要

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

所以我现在使用的这段代码不起作用,因为它显示多余的零:

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

Answer 1

你弄错了.这将有效:

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

Answer 2