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

Thanks Peter. What I missed (in my hard way version) is this piece of code in the awakeFromNib in the appDelegate:

NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
[center addObserver:self selector:@selector(textDidChange:) name:NSControlTextDidChangeNotification object:myTextField];

It works perfect. Now I´m trying the easy way, but I´m afraid I´m not still good enough with the bindings.

To bind the property

@property (retain) IBOutlet NSString *aStringValue;

with the textfield´s value, what I have to use in IB for "Bind to:", "Controller Key" and "Model Key Path"?