MacOSX:获得最重要的窗口标题

if let window = NSApplication.shared.keyWindow {
    let title = window.title
    print("窗口标题：\(title)")
}

tell application "System Events"
    set frontApp to name of first application process whose frontmost is true
    tell application frontApp
        set windowTitle to name of front window
        display dialog "窗口标题：" & windowTitle
    end tell
end tell