macOS Custom NSFormatter behaving oddly

[BadWolf13]

Ok, so I created a custom NSFormatter that I've connected my textfield to. It's working fine as long as the text field is the active object in the window. As soon as I select another text field, the formatted text field becomes blank. Even more strange, it regains it's former value as soon as I select it again. It just *poof* reappears. I haven't connected the value of the text field to anything either through code or bindings, but shouldn't this work even without any connection of the text field's value?

 

[kainjow]

When posting questions like this, post your code if possible. Otherwise it's hard to know how to help.

 

[BadWolf13]

Unfortunately there's not much code to speak of. I do most of the connections in interface builder.

This program started working when I added an IBOutlet in the AppDelegate class, even though I hadn't connected it to the text field. I took the IBOutlet out, and it still works. At this point I still have no idea why it didn't work before but works now.