I’ve found a bug in Swift’s loadView for UIViewController on iOS that I’d like
to report. Swift.org tells us to use https://bugreport.apple.com which returns
“bugreport.apple.com’s server IP address could not be found.”.
Feedback.apple.com seems not related to bug reporting.
I’ve created two projects that show expected behaviour for loadView in
UIViewController, and how in Swift, what is indicated in the header for
loadView is not followed.
How can I report this to Apple or the Swift team?
Essentially, what this header information is telling us is not followed in
Swift 5.x, breaking over 13 years of precident. Swift does not attempt to load
an XIB that matches the name of the class being instantiated if the view is
nil, counter to what the header file says it should do.
From UIViewController.h
/*
The designated initializer. If you subclass UIViewController, you must
call the super implementation of this
method, even if you aren't using a NIB. (As a convenience, the default
init method will do this for you,
and specify nil for both of this methods arguments.) In the specified
NIB, the File's Owner proxy should
have its class set to your view controller subclass, with the view outlet
connected to the main view. If you
invoke this method with a nil nib name, then this class' -loadView method
will attempt to load a NIB whose
name is the same as your view controller's class. If no such NIB in fact
exists then you must either call
-setView: before -view is invoked, or override the -loadView method to
set up your views programatically.
*/
The behaviour below is what is simply not happening.
If you
invoke this method with a nil nib name, then this class' -loadView method
will attempt to load a NIB whose
name is the same as your view controller's class.
The easyiest way to reproduce this is to simply create a ViewController with an
XIB and make it the initial view controller in a storyboard.
Add a label to the XIB to make it obvious when or if the XIB loads.
In the storyboard scene for that viewController, delete the top level view to
create the nil condition and run the app.
In an Objective-C app on iOS, the expected XIB loads.
In a Swift app on iOS, the view is empty and no XIB loads.
This is validated in the View Debugger.
So, how can I report this?
Thanks in advance.
Alex Zavatone
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