Objective c Xcode小数位

我想将数字值显示为最大小数位数。如果未将浮点格式设置为：

@"%.1f"

然后它将显示数字，例如1.000000。我想要的是这个数字应该有它所需要的最大小数位数

我不需要

1.5需要小数点后1位

1.24需要两位小数

是否有某种代码将数字格式化为最大小数位数？

将“f”替换为“g”

从

printf（3）

：

 gG      The double argument is converted in style f or e (or F or E for G conver-
         sions).  The precision specifies the number of significant digits.  If the
         precision is missing, 6 digits are given; if the precision is zero, it is
         treated as 1.  Style e is used if the exponent from its conversion is less
         than -4 or greater than or equal to the precision.  Trailing zeros are removed
         from the fractional part of the result; a decimal point appears only if it is
         followed by at least one digit.