如何在iPhone中将十进制值与整数进行比较？

Question

嗨我的最小值为100，最大值为400.用户应输入此值。如果他们输入400.5就不应该接受。这是我的文本域的验证。我使用了以下代码

    NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
                [formatter setNumberStyle:NSNumberFormatterDecimalStyle];
                NSNumber *textFieldNumber = [formatter numberFromString:[dynamicHealthyHeartTxtFld text]];
                NSNumber *MaxNumber = [formatter numberFromString:[[healthyHeartFieldsAry objectAtIndex:getHHTag] objectForKey:@"MaxVal"]];
                NSNumber *MinNumber = [formatter numberFromString:[[healthyHeartFieldsAry objectAtIndex:getHHTag] objectForKey:@"MinVal"]];


                if ([self checkForDecimalValue:dynamicHealthyHeartTxtFld.text]) 
                {





                    if (([textFieldNumber decimalValue] < [MinNumber decimalValue]) || ([textFieldNumber decimalValue] > [MaxNumber decimalValue]) ) {

                        if ([textFieldNumber decimalValue] < [MinNumber decimalValue]) {

                            Custom_Alert *alert=[[Custom_Alert alloc] initWithTitle:@"Alert" message:[NSString stringWithFormat:@"The Value you entered in %@ is outside the acceptable range.Please correct and Continue ",[[healthyHeartFieldsAry objectAtIndex:getHHTag] objectForKey:@"TestName"]] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
                            [alert show];
                            enterAlert=YES;
                            [alert release];

                        }
                        else
                        {
                            Custom_Alert *alert=[[Custom_Alert alloc] initWithTitle:@"Alert" message:[NSString stringWithFormat:@"The Value you entered is %@ outside the acceptable range.Please correct and Continue",[[healthyHeartFieldsAry objectAtIndex:getHHTag] objectForKey:@"TestName"]] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
                            [alert show];
                            enterAlert=YES;
                            [alert release];

                        }

                    }


                }

如果我使用此代码。它接受400.5。请帮我解决这个问题。

Answer 1

您需要将文字字段返回的NSString转换为NSNumber：

NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
NSNumber *textFieldNumber = [formatter numberFromString:[textField text]];

然后使用

[textFieldNumber decimalValue] > 100.0 && [textFieldNumber decimalValue] < 400

检查范围。

Answer 2

我已将（textfield.text）字符串转换为double值，并且我将double值与double值进行比较。它工作正常。谢谢你的所有答案。