除了%.2f以外的保留几位小数方法了解一下

//这里参数是字符串，可以改成double、float、integer

-(NSString*)notRounding:(NSString*)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] initWithString:price];

    roundedOunces = [ouncesDecimaldecimalNumberByRoundingAccordingToBehavior:roundingBehavior];

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

}