Currency Converter

[bones237]

This tutorial from Nitrex88 was awesome... You know that feeling when you've been searching all day on how to do something and then you find something that explains exactly what u were trying to do? Awesome, right? Well that's what it was like when I find this one. I'm fairly new to developing for mac OS and iphone (only 2 months in) so this was great.
I do have one question that maybe somebody can help me with.
In Nitrex's tut, he was using text fields to enter float values and then perform a calculation between them.
For what I am using this for, I changed the float values to integer values. What should I do if I don't want a certain value to exceed a number. For ex. if the user enters a number greater than 4 into one of the text fields, that text fields integer value would be equal to 4? This is what I tried:

if([aTextField.text intValue] > 4){
		aTextField.text = 4;
	}

I put this code right before the line of code that performs the calculation but it didn't work. It actually compiles but when a number greater than 4 is entered in "aTextField", my app freezes.

Also, how do i perform rounds. If the result of my calculation needs to be rounded up or rounded down, how can I do that? Do I need to change my float values back to integer values and then perform some code, right?
Any help would be greatly appreciated

[Cibetik]

textfield.text has to be a string value, so you cannot put number as text property. You can do
NSNumber *intNumber=[NSNumber numberWithInt:4];
textField.text=[intNumber stringValue];

[bones237]

Originally Posted by Cibetik

textfield.text has to be a string value, so you cannot put number as text property. You can do
NSNumber *intNumber=[NSNumber numberWithInt:4];
textField.text=[intNumber stringValue];

Hey thanks for the reply. I just was about to edit my post when I saw yours. I figured out how to do it but I came up with a different way than yours. This is what i did:

if([textField.text intValue] > 4){
    textField.text = [NSString stringWithString: @"4"];
}

I was playing around with the code until i got this. Which way is the more proper way to do it ( in terms of correct way to program)? Mine or Yours?
Either way, they both do the same thing: When a user enters say 20 into the text field, once i hit my "calculate" button the text field value is assigned a 4, which is what i want, but the text field also displays that 4 that it changed to. Is there any way to change the value to 4 like it does but also keep the value that is displayed in the text field to 20, or whatever they entered.
The reason for this is once the user enters 20 then hits calculate, they may think they messed up cuz they'll see the text field change to 4 even tho they entered 20. I want to keep what they entered in the display but behind the scenes change the value to 4. Is this possible?

[Cibetik]

I´m not sure, what you want to do, but one option is not assign 4 to textfield.text but create new variable (e.g. integer) and assign textfield.text value to this integer:

//for example input was 20 so
NSInteger integer=[textfield.text intValue];

and then use value integer so:

integer=4;

textfield will still show 20 and you will use value integer for your code

Your code i

f([textField.text intValue] > 4){
    textField.text = [NSString stringWithString: @"4"];
}

is better for your situation, my is better, when you need do some operation with number.

[roberthuttinger]

I thought this would help as well. Ive been trying this for 4 hours til I finally found this simple solution. the basics are good to learn I hear!

oppnumber=[[[mainDelegate.personArray objectAtIndex:1] lastName] intValue];

cheers.rob