How to make a IBOutlet associated with a variable in Xcode

Hi, I want to make a IBOutlet in Xcode 5.0.2 that is accosiated with a variable, bascially, what I'm trying to achieve is to make it so that I have a textfield and then take the value of that string of that textfield and store it into a variable, then pass it onto a calculation action. A very basic calculator, how can I do this?
And also, how would you make a variable (I think I know how but I'm not sure)? I used @property (*paramaters*) *thisIsAnExample;

Alas, it isn't quite as simple as that. This is Xcode, not Borland Delphi circa 1999 (ouch!). Create a property for the value:
@property (strong) NSString * value;
And then create a binding for the IB object's "value" property to the value key path.
You would use an IBOutlet like so:
@property (strong) IBOutlet NSTextField * field;
in order to refer to the IB object from your code. Use the binding to allow the IB object to access the property in your code.

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