小编Cha*_*adK的帖子

我试图NSNumberFormatter在iPhone应用程序中将数字[formatter stringFromNumber:]舍入到5位小数,但始终返回舍入到0.001(3位小数)的字符串.我究竟做错了什么？

formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
[formatter setRoundingMode:NSNumberFormatterRoundHalfUp];
[formatter setSecondaryGroupingSize:3];
[formatter setRoundingIncrement:[NSNumber numberWithDouble:0.00001]];