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Editorial Team
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Asked: 2026-05-27T16:15:33+00:00

I often see this line of code [super awakeFromNib] in the awakeFromNib method in

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I often see this line of code 

[super awakeFromNib]

in the awakeFromNib method in the implementation of a view controller

My understanding is it is telling the super class of this view controller (which would be the window) to awakeFromNib.
Am I right? If so, why do we have to tell the window to awake in the awakeFromNib method of a UIView Controller sub-class?

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1 Answer

  1. Editorial Team

    My understanding is it is telling the super class of this view controller …

    right so far…

    (which would be the window)

    oops – that’s the source of your confusion.

    The “super class of the view controller” is UIViewController. “super” is referring to the base class that your UIViewController sub-class inherits from; it doesn’t have anything to do with the window that encloses your view.

    So, what this is doing is invoking the default awakeFromNib implementation of a basic UIViewController, in addition to whatever you’re doing in your sub-class implementation.

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