Custom UIMenuItem not working on PDFKit's PDFView - ios

Question

I'm trying to add a custom UIMenuItem to my PDFView
Here's what I'm doing in my sample Xcode project
#import <PDFKit/PDFKit.h>
#import <objc/runtime.h>
#import "ViewController.h"
#interface ViewController ()
#property(nonatomic) PDFDocument *document;
#property(nonatomic) PDFView *pdfView;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
NSURL *pdfPath = [[NSBundle mainBundle] URLForResource:#"pdf" withExtension:#"pdf"];
_document = [[PDFDocument alloc] initWithURL:pdfPath];
_pdfView = [[PDFView alloc] initWithFrame:CGRectZero];
_pdfView.document = _document;
[self.view addSubview:_pdfView];
_pdfView.translatesAutoresizingMaskIntoConstraints = NO;
[_pdfView.topAnchor constraintEqualToAnchor:self.view.topAnchor].active = YES;
[_pdfView.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor].active = YES;
[_pdfView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor].active = YES;
[_pdfView.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor].active = YES;
UIMenuItem *menuItem =
[[UIMenuItem alloc] initWithTitle:#"Custom Action"
action:#selector(doSomething)];
[[UIMenuController sharedMenuController] setMenuItems:#[ menuItem ]];
[[UIMenuController sharedMenuController] update];
}
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
if (sel_isEqual(action, #selector(doSomething))) {
return YES;
}
return NO;
}
- (void)viewDidAppear:(BOOL)animated {
[self becomeFirstResponder];
}
- (void)doSomething {
NSLog(#"In Do Something!");
}
- (BOOL)canBecomeFirstResponder {
return YES;
}
#end
This works fine on iOS 11 and 12, but on iOS 13, the UIMenuItem is not showing up

Answer 1

For me assigning menuItems in handler of NSNotification.Name.PDFViewSelectionChanged works
NotificationCenter.default.addObserver(self,
selector: #selector(selectionChangeNotification),
name: NSNotification.Name.PDFViewSelectionChanged,
object: pdfView)
#objc
private func selectionChangeNotification() {
let menuItem = UIMenuItem(title: "Custom Action", action: #selector(doSomething))
UIMenuController.shared.menuItems = [menuItem]
}