How I can use AXObserverAddNotification in Swift to detect an UI change?
There's a great answer here in Obj C.
How can my app detect a change to another app's window?
How to translate the answer to Swift?
The testing code below compiles and runs without an error, but callBack doesn't seem to get executed when I change main window.
func observe(app:pid_t, element:AXUIElement) {
var observer: AXObserver? = nil
func callBack(observer: AXObserver?, element: AXUIElement?, notification: CFString, refcon: UnsafeMutableRawPointer?) {
print("Fired! \(notification)")
}
if AXObserverCreate(app, callBack, &observer) == .success {
print("AXObserverCreate success!")
if AXObserverAddNotification(observer!, element, kAXMainWindowChangedNotification as CFString, UnsafeMutableRawPointer(Unmanaged.passRetained(self).toOpaque())) == .success {
print("AXObserverAddNotification success!")
CFRunLoopAddSource(CFRunLoopGetCurrent(), AXObserverGetRunLoopSource(observer!), .defaultMode)
print("Watching \(element.value(of:"AXTitle"))")
}
}
}
