Disable/Enable NSButton if NSTextfield is empty or not

Question

I´m newbie with cocoa. I have a button and a textField in my app. I want the button disabled when the textfield is empty and enabled when the user type something.

Any po

Answer 1

Here's a solution using bindings.

Below I setup a NSTextField that is bound to the file owner's "text" property. "text" is a NSString. I was caught by "Continuously Updates Value". Thinking my solution didn't work but really it wasn't updating as the user typed, and only when the textfield lost focus.

And now setting up bindings on the button, simply set its enabled state to the length of the file owner's text property.

Annd, the working product.