iphone / objective-c how to check to see if a textfield is empty

I have a typical textfield in an iphone app, and in ViewWillAppear I would like to do a little logic using the text in the text field.

If txtField.text is empty, I would like the next textfield, txtField2 to be selected for typing.

I am trying to achieve this through :

if (txtField.text != @"") [txtField2 becomeFirstResponder];

but after some testing, txtField.text (whilst empty), will still not register as being equal to @"" What am I missing?