保留两位小数,不四舍五入

-(NSString*)notRounding:(float)price afterPoint:(int)position{

    NSDecimalNumberHandler* roundingBehavior = [NSDecimalNumberHandler decimalNumberHandlerWithRoundingMode:NSRoundDown scale:position raiseOnExactness:NO raiseOnOverflow:NO raiseOnUnderflow:NO raiseOnDivideByZero:NO];

    NSDecimalNumber*ouncesDecimal;

    NSDecimalNumber*roundedOunces;

    ouncesDecimal = [[NSDecimalNumber alloc] initWithFloat:price];

    roundedOunces = [ouncesDecimaldecimalNumberByRoundingAccordingToBehavior:roundingBehavior];

    return [NSString stringWithFormat:@"%@",roundedOunces];

}