Question

Hi i have a minimum value as 100 and maximum value as 400. User should enter within this values. If they enter 400.5 it shouldn’t accept. that is the validation for my textfield. I used the following code

    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];

                        }

                    }


                }

If i use this code. it is accepting the 400.5. pls help me to solve this issue.

Answer 1

You need to convert the NSString returned by your text field to an NSNumber:

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

Then use

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

to check the range.