How to detect all touches in Swift 2

Question

I am trying to create a timeout function for an application that I am developing using Swift 2, but in swift 2 you can put this code in the application delegate and it works, but it does not detect keystrokes, button presses, text presses, etc .:

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    super.touchesBegan(touches, withEvent: event);
    let allTouches = event!.allTouches();

    if(allTouches?.count > 0) {
        let phase = (allTouches!.first as UITouch!).phase;
        if(phase == UITouchPhase.Began || phase == UITouchPhase.Ended) {
            //Stuff
            timeoutModel.actionPerformed();
        }
    }
}

Before Swift 2, I was able to subclass AppDelegate UIApplication and override sendEvent: for example:

-(void)sendEvent:(UIEvent *)event
{
    [super sendEvent:event];

    // Only want to reset the timer on a Began touch or an Ended touch, to reduce the number of timer resets.
    NSSet *allTouches = [event allTouches];
    if ([allTouches count] > 0) {
        // allTouches count only ever seems to be 1, so anyObject works here.
        UITouchPhase phase = ((UITouch *)[allTouches anyObject]).phase;
        if (phase == UITouchPhaseBegan || phase == UITouchPhaseEnded)
            [[InactivityModel instance] actionPerformed];
    }
}

The code above works for every touch, but the quick equivalent only works when the view does not exist on this UIWindow hierarchy?

Does anyone know a way to detect every touch in the app?

Answer 1

- , :

• sendEvent UIWindow -
• sendEvent -

, - UIApplication. ( iOS 9):

@objc(MyApplication) class MyApplication: UIApplication {

  override func sendEvent(event: UIEvent) {
    //
    // Ignore .Motion and .RemoteControl event
    // simply everything else then .Touches
    //
    if event.type != .Touches {
      super.sendEvent(event)
      return
    }

    //
    // .Touches only
    //
    var restartTimer = true

    if let touches = event.allTouches() {
      //
      // At least one touch in progress?
      // Do not restart auto lock timer, just invalidate it
      //
      for touch in touches.enumerate() {
        if touch.element.phase != .Cancelled && touch.element.phase != .Ended {
          restartTimer = false
          break
        }
      }
    }

    if restartTimer {
      // Touches ended || cancelled, restart auto lock timer
      print("Restart auto lock timer")
    } else {
      // Touch in progress - !ended, !cancelled, just invalidate it
      print("Invalidate auto lock timer")
    }

    super.sendEvent(event)
  }

}

@objc(MyApplication). , Swift -, Objective-C, : Objective-C MyApplication.

, info.plist Principal MyApplication (MyApplication - , @objc(...), Swift). NSPrincipalClass.

Answer 2

UIWindow sendEvent, . . Swift 4:

class IdlingWindow: UIWindow {
    /// Tracks the last time this window was interacted with
    var lastInteraction = Date.distantPast

    override func sendEvent(_ event: UIEvent) {
        super.sendEvent(event)
        lastInteraction = Date()
    }
}

, didFinishLaunchingWithOptions:

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: IdlingWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        window = IdlingWindow(frame: UIScreen.main.bounds)
        window?.rootViewController = UIStoryboard.init(name: "Main", bundle: nil).instantiateInitialViewController()
        window?.makeKeyAndVisible()
        return true
    }
    :
}

extension UIApplication {
    /// Conveniently gets the last interaction time
    var lastInteraction: Date {
        return (keyWindow as? IdlingWindow)?.lastInteraction ?? .distantPast
    }
}

, :

if UIApplication.shared.lastInteraction.timeIntervalSinceNow < -2 {
    // the window has been idle over 2 seconds
}