What exactly does the File's Owner and First Responder Placeholder in Xcode represent

Question

What exactly does the File's Owner and First Responder Placeholder in X code represent.can any one describe here in details and how to use it when we developing application.

please read an introductory book about iOS app development! -1 — Michael, Apr 23 '14 at 12:21
He is right ,apple doc is to technically to understand for beginner.. — , Apr 23 '14 at 12:23

score 1 · Accepted Answer · answered Apr 23 '14 at 12:31

The File owner is the object that loads the nib . Ie. that object which receives the message loadNib Named: or initWithNibName: .
So if you want to access any objects in the nib from the object after loading it , you set an outlet to the the file owner .

What exactly does the File's Owner and First Responder Placeholder in Xcode represent

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