AppDelegate.swift

import Cocoa
import AXSwift

class ApplicationDelegate: NSObject, NSApplicationDelegate {
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        // Check that we have permission
        guard UIElement.isProcessTrusted(withPrompt: true) else {
            NSLog("No accessibility API permission, exiting")
            NSRunningApplication.current.terminate()
            return
        }

        // Get Active Application
        if let application = NSWorkspace.shared.frontmostApplication {
            NSLog("localizedName: \(String(describing: application.localizedName)), processIdentifier: \(application.processIdentifier)")
            let uiApp = Application(application)!
            NSLog("windows: \(String(describing: try! uiApp.windows()))")
            NSLog("attributes: \(try! uiApp.attributes())")
            NSLog("at 0,0: \(String(describing: try! uiApp.elementAtPosition(0, 0)))")
            if let bundleIdentifier = application.bundleIdentifier {
                NSLog("bundleIdentifier: \(bundleIdentifier)")
                let windows = try! Application.allForBundleID(bundleIdentifier).first!.windows()
                NSLog("windows: \(String(describing: windows))")
            }
        }

        // Get Application by bundleIdentifier
        let app = Application.allForBundleID("com.apple.finder").first!
        NSLog("finder: \(app)")
        NSLog("role: \(try! app.role()!)")
        NSLog("windows: \(try! app.windows()!)")
        NSLog("attributes: \(try! app.attributes())")
        if let title: String = try! app.attribute(.title) {
            NSLog("title: \(title)")
        }
        NSLog("multi: \(try! app.getMultipleAttributes(["AXRole", "asdf", "AXTitle"]))")
        NSLog("multi: \(try! app.getMultipleAttributes(.role, .title))")

        // Try to set an unsettable attribute
        if let window = try! app.windows()?.first {
            do {
                try window.setAttribute(.title, value: "my title")
                let newTitle: String? = try! window.attribute(.title)
                NSLog("title set; result = \(newTitle ?? "<none>")")
            } catch {
                NSLog("error caught trying to set title of window: \(error)")
            }
        }

        NSLog("system wide:")
        NSLog("role: \(try! systemWideElement.role()!)")
        // NSLog("windows: \(try! sys.windows())")
        NSLog("attributes: \(try! systemWideElement.attributes())")

        NSRunningApplication.current.terminate()
    }
}