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In a custom xib file, what's the difference between the two following setting methods shown in the images below? enter image description here

enter image description here

jscs
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Alfy
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2 Answers2

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please check this link : What is the File's Owner (in Interface builder)? confused difference between Custom Class for an Object and for the File's Owner and steps via IB

in first screen shot : you should set the custom class of your View .

and in the second screen shot (files owner) you can Set the file's owner to your UIView subclass so that you can connect outlets to it

Community
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Mo Farhand
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  • Thank you, I got it from your answer! – Alfy Jan 20 '16 at 09:00
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    I still cannot figure it out from your explanation, I have a subclass of `UITableViewCell` with certain customization functions, however I've tested that no matter where I assign this subclass, as File's Owner or Custom Class, there is no difference at all, I cannot set and connect outlets regardless the places. Even I set to both places it still behaved the exactly the same. – Saorikido Mar 03 '17 at 13:52
  • @Mazen WDM that you can't find a difference ? – Mo Farhand Apr 15 '17 at 23:49
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    It works even if I set the class to the UIView, not the file owner. I can connect an outlet to a UILabel and edit its contents. I can't find any difference between setting the class to the file's owner vs to the view. – Mazen Apr 16 '17 at 08:32
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When you add custom UIView with XIB you init this custom view in some UIViewController and write: 

let nib = UINib(nibName: "CardView", bundle: nil)
let view = nib.instantiate(withOwner: self, options: nil).first as! CardView

File's owner (in withOwner: parameter) this is usually owner is a ViewController where you add your custom UIView

Janserik
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