My NSScrollView is not scrolling my NSTextView (document) - cocoa

Question

So I've been burned by this a few times. I'm trying to create an NSTextView that can be scrolled.
The only way I've gotten it to work is by having a Xib—but right now that stopped working after I added a Stack View in an adjacent Split View for God-knows-what-reason.
So what have I done?
I have code for code copied down the Apple Docs like for Text in Scroll View like so:
// https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/TextUILayer/Tasks/TextInScrollView.html
BOOL deviateFromAppleScrollDoc = NO;
_scrollView = [[NSScrollView alloc]
initWithFrame:[[self view] frame]];
// Apple Has
// [[theWindow contentView] frame]];
// but we are in a sub-View-Controller
NSSize contentSize = [_scrollView contentSize];
[_scrollView setBorderType:NSNoBorder];
[_scrollView setHasVerticalScroller:YES];
[_scrollView setHasHorizontalScroller:NO];
[_scrollView setAutoresizingMask:NSViewWidthSizable |
NSViewHeightSizable];
_editorView = [[EditorView alloc]
initWithFrame:NSMakeRect(
0, 0,
contentSize.width, contentSize.height)];
[_editorView setMinSize:NSMakeSize(0.0, contentSize.height)];
[_editorView setMaxSize:NSMakeSize(FLT_MAX, FLT_MAX)];
[_editorView setVerticallyResizable:YES];
[_editorView setHorizontallyResizable:NO];
if (deviateFromAppleScrollDoc)
{
[_editorView setAutoresizesSubviews:YES];
[_editorView setAutoresizingMask:NSViewWidthSizable|NSViewHeightSizable];
}
else
{
[_editorView setAutoresizingMask:NSViewWidthSizable];
}
[[_editorView textContainer]
setContainerSize:NSMakeSize(contentSize.width, FLT_MAX)];
[[_editorView textContainer] setWidthTracksTextView:YES];
if (deviateFromAppleScrollDoc)
{
[[_editorView textContainer] setHeightTracksTextView:YES];
}
if (deviateFromAppleScrollDoc)
{
NSClipView *clipView = [[NSClipView alloc] init];
[clipView setDocumentView:_editorView];
[_scrollView setContentView:clipView];
}
else
{
[_scrollView setDocumentView:_editorView];
}
[[self view] addSubview:_scrollView];
What does that get me?
As you can tell, there is an NSTextView. It does not fill the Container as I would like it to.
There is also a Scroll View and I can tell it is active. You can pull down and get a rebound effect—but it does not scroll the document as I would like. This text is cut off mid-sentence and when I add to it, the View does not scroll with my typing—and even if I scroll I can't get to it.
The Scroll View is "stuck".
I can make it fill the entire window if I change the Autoresizing mask to inlcude NSViewHeightSizable like so:
[_editorView setAutoresizingMask:NSViewWidthSizable|NSViewHeightSizable];
See here:
Unfortunatley, it still does not scroll and the "Scroll View" is still "Stuck".
I don't know what to change.
I have tried to add a "NSClipView" and set the Content View instead like so:
NSClipView *clipView = [[NSClipView alloc] init];
[clipView setDocumentView:_editorView];
[_scrollView setContentView:clipView];
This does not work either.
Moreover it does something funky to the width and some of the letters get cut off. Not acceptable. No solution yet.
What am I missing?
What do I need to try / set / do?
Thank you!
UPDATE:
The Scroll View does scroll the document when I activate the find menu in the NSTextView.
Still mystified.
See here: