Trouble with first progråµ

Question

I'm having trouble with my simple calculator, which is similar to the calculator in "cocoa programming for dummies".
http://public.me.com/schoolkid144
its firstproject.zip
The trouble is that when I get the value of the two text fields, it always returns 0 even when the value of both text fields is 1.

Answer 1

Hi S-T Programmer, and welcome to the Dev Forums!
The connections between the FuseBox outlets and the three text fields just need to be reversed in Interface Builder. An IBOutlet instance variable is associated with an Interface Builder object by Ctrl-Dragging from the object which owns the variable to the object the variable wants to reference. For example, to connect the FuseBox ivar named answerField to the text field which is to display the answer, Ctrl-Click on the FuseBox icon in the xib window then drag to the desired text field object. The text field object may either be found as an icon in the xib (Document) window, or as the full-scale drawing of the object in the IB Editor window (where you lay out the view). When you release the mouse at the end of the drag, a black list of all the FuseBox class outlets will pop up. Select the outlet you meant to connect (in this case answerField), and the connection will be made.
The problem with giving IB instructions in the forum is that a picture is worth a thousand words, and this post is on the wrong side of that equation. So I'm hoping you'll be able to see enough of the picture from all these words. There are two other ways of making IB connections that are harder to use, but easier to explain:
1) If you Ctrl-Click (without dragging) on any icon in the xib window, a floating, black panel will pop up showing every possible connection to that object. To make the same connection discussed above from the answerField outlet to the right-hand text field, Ctrl-Click on the FuseBox icon and find answerField in Outlet list. You can now drag directly from the connector symbol to the desired text field. This time there's no popup when you release the mouse because IB already knows which outlet is to be connected. After the connection is made, you can Ctrl-Click on the text field icon and see its connection panel. You'll know the connection is going in the right direction when the connection to the text field is listed under +Referencing Outlets+ and the connection back at the FuseBox object is listed under Outlets.
The floating, black connection panels are especially useful for deleting connections. Since your project currently has three backwards connections, you can use these panels to delete those by clicking on the 'X' which is visible on each connection line.
2) There's also a tab in the Inspector window for making connections. Select one of the objects you want to connect and select Tools>Connections Inspector from the top menu if you have trouble finding the tab. You can make connections in this window if you want, but you can also use the Connections Inspector to view the connections previously made by dragging.
This topic is covered in more detail (including some screen shots! yay!!) under Creating and Managing Outlet and Action Connections in the +Interface Builder User Guide+.
I think your connection between the Calculate button and the FuseBox was correct. This post has gotten so long I can't remember if I had to reverse that one too, but I don't think I did. Anyway you'll be able to check for yourself now that you know what to look for, right? The connection between an object's Sent Action and an IBAction method goes in the direction opposite to an IBOutlet connection. Thus to connect the Calculate button you need to drag from the button to the FuseBox.
_Outlet from_ the FuseBox
_Action to_ the FuseBox
Hope that helps!
\- Ray