Cannot listen to MenuItem's Title changes in the app's MenuBar

[tomaskupka]

Hey, thanks so much for this library. It works great for observing changes on windows etc.

However I cannot make it work to observe a MenuItem's Title changes in the app's MenuBar.
I can construct UIElement object that locates that MenuItem. It's the correct pointer, because I can perform an action successfully.

menuItem.performAction(kAXPressAction)

Is there some trick to achieve that or the app may be even broadcasting those events?

Snippet of my code:
var menuItem = UIElement(getMenuItem()) //my function that returns the MenuItem as AXUIElement
//try menuItem.performAction(kAXPressAction) //just a test if the pointer is working

try observer.addNotification(.titleChanged, forElement: menuItem)

No events are triggered using this code. I tried also Accessibility Inspector and the MenuItem has exact ID, and just changes it's Title (a toggle).

Thanks for any clue.

[soundflix]

You have to store a reference to your observer.

[tomaskupka]

Thanks. Could you please elaborate?

I think I do, here is full example:

import Cocoa
import AXSwift
import ApplicationServices

class AppDelegate: NSObject, NSApplicationDelegate {
    
    var observer: Observer!
    
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        let app = Application.allForBundleID("com.apple.finder").first!
        
        do {
            try startWatcher(app)
        } catch let error {
            NSLog("Error: Could not watch app [\(app)]: \(error)")
            abort()
        }
    }
    
    func startWatcher(_ app: Application) throws {
        observer = app.createObserver { (observer: Observer, element: UIElement, event: AXNotification, info: [String: AnyObject]?) in
            var elementDesc: String!
            
            print("Event")
        }
        
        var menuItem = UIElement(getMenuItem())
        //try menuItem.performAction(kAXPressAction)
        
        try observer.addNotification(.titleChanged, forElement: menuItem)
    }
    
    func getMenuItem() -> AXUIElement{...}
}