Swift init ViewController from Xib file error

Question

Using Xcode 8.2 and Swift 2.3

I have a view controller files namVcc.swift and namVccUI.xib

I am trying to initialize the view controller from xib file but getting error

|*| Try 1 :

let namVccVar = UINib(nibName: "namVccUI", bundle:
    nil).instantiateWithOwner(nil, options: nil)[0] as! namVcc

navigationController?.pushViewController(namVccVar, animated: true)

|*| Try 2 :

let namVccVar = namVcc(nibName: "namVccUI", bundle: nil)

navigationController?.pushViewController(namVccVar, animated: true)

Error: Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Could not load NIB in bundle: 'NSBundle (loaded)' with name 'namVccUI'

I also checked the properties of xib file > Target Membership and it's checked.

What else could be the problem?

The first one looks right. Are you 100% sure the .xib is named 'namVccUI'? And is it in the same bundle as the viewController you're trying to initialize it in? — creeperspeak

Walter Walter · Accepted Answer · 2018-01-08T22:50:14

I am getting a similar but slightly differently worded error when I try to set this up. I get

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "namVccUI" nib but the view outlet was not set.'

when I just create an empty project with your code in Try 2 and a new, clean .xib file. I had to explicitly set the Referencing Outlet of the UIView in the .xib file to the File's Owner and I had to ensure that the Custom Class of the File's Owner in the .xib was set to namVcc. I never could get Try 1 to work.

Swift init ViewController from Xib file error

1 Answers