如何实现后台返回的数据有.00或.0，显示时若是整数不显示小数点和小数电以后的0,小数显示小数点

-(NSString *)getIntStrWithStr:(NSString *)str
{
    if(isCommonUnitEmptyString(str))
    {
        return @"";
    }
    if([str rangeOfString:@"."].location == NSNotFound)
    {
        return str;
    }
    NSInteger i = str.length-1;
    for(; i > 0; i--)
    {
        NSString *str1 = [str substringWithRange:NSMakeRange(i, 1)];
        if(!([str1 isEqualToString:@"0"] || [str1 isEqualToString:@"."]))
        {
            break;
        }
    }
    if(i+1 == str.length)
    {
        return str;
    }
    else
    {
        return [str substringToIndex:(i+1)];
    }
}

//判断字符串为空
static inline BOOL isCommonUnitEmptyString(NSString *str) {
    return ([str isKindOfClass:[NSNull class]] || str == nil || ![str isKindOfClass:[NSString class]] || [str length] < 1);
}

- (void)setModel:(LCNewYearDinnerModel *)model {
    _model = model;
    model.cost_price = [self getIntStrWithStr:model.cost_price];
    model.price = [self getIntStrWithStr:model.price];
    [self.originPrice setText:[NSString stringWithFormat:@"门店价格：￥%@", model.cost_price]];
    [self.price setText:[NSString stringWithFormat:@"￥%@", model.price]];
}

  errcode = 1,
  data =  (
      {
      price = "1688.00",
      cost_price = "1888.00",
      use_start_time = "12.20",
      use_end_time = "01.30",
      suppliers_name = "兰小溪特色美食餐厅",
      goods_name = "年夜饭",
      goods_id = 132,
    },
  ),