4舍5入 保留小数点后2位

gistfile1.txt

    NSDecimalNumber *subtotal = [NSDecimalNumber decimalNumberWithString:@"90.7146"];

        //保留小数点后两位
    NSDecimalNumberHandler*roundUp = [NSDecimalNumberHandler decimalNumberHandlerWithRoundingMode:NSRoundBankers scale:2 raiseOnExactness:NO raiseOnOverflow:NO raiseOnUnderflow:NO raiseOnDivideByZero:YES];


    NSDecimalNumber*total = [subtotal decimalNumberByRoundingAccordingToBehavior:roundUp];
    
    NSLog(@"total:%@",total);
    
    NSLog(@"%f", round([[NSStringstringWithFormat:@"%f",12345.6749] floatValue]*100)/100);  这种方式不准