1
好了,所以如果我有一个双重开始与我怎么限制它或截断位数1DP,因为我知道不是在需要的时候来看待如何截断从双.000零与NSNumberFormatter
double a = 1.6;
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
NSString *numberAsString = [numberFormatter stringFromNumber:[NSNumber numberWithDouble:a]];
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];
[numberFormatter setGeneratesDecimalNumbers:YES];
[numberFormatter setMaximumFractionDigits:1];
[numberFormatter setMinimumFractionDigits:1];
[numberFormatter setAlwaysShowsDecimalSeparator:YES];
NSLog(@"a raw: %f", a); //outputs 1.600000
myLabel.text = [NSString stringWithFormat:@"%@",numberAsString];
NSLog(@"Formatted a: %@", numberAsString); //outputs 2
[numberFormatter release];
所以问题在于它舍入了值并且没有保留小数位,我试图让它为myLabel输出1.6。
http://stackoverflow.com/questions/7469614/remove-more-than-2-trailing-zero/ 7470191#7470191 – 2011-09-19 11:32:43