I have set IBOutlet for NSSearchField but it's always find nil in .m file. Why???
If have any idea then please give answer related to my issues.
According to your storyboard, you created NSObject
of Appdelegate
and through that object you create outlet, that's why its not accessible.
So, you have to create NSWindowController
class and assign this class to WindowController
in storyboard. Then declare outlet in that class.
Now it is accessible and work as you want.