-(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 = [ouncesDecimal decimalNumberByRoundingAccordingToBehavior:roundingBehavior];
[ouncesDecimal release];
return [NSString stringWithFormat:@"%@",roundedOunces];
}
介紹一下參數(shù)：
price:需要處理的數(shù)字普监，
position：保留小數(shù)點(diǎn)第幾位仍律，
然后調(diào)用
floats =0.126;NSString*sb = [selfnotRounding:s afterPoint:2];NSLog(@"sb = %@",sb);
輸出結(jié)果為：sb = 0.12
接下來介紹NSDecimalNumberHandler初始化時的關(guān)鍵參數(shù)：decimalNumberHandlerWithRoundingMode：NSRoundDown酱酬，
NSRoundDown代表的就是只舍不入庶灿。
scale的參數(shù)position代表保留小數(shù)點(diǎn)后幾位。
