[iOS] How to detect screen activity via UIViewController

如何判斷 user 是否 idle timeout, 就是在 on touch 裡  reset 掉 timer counter 應該就可以了。

 


Decalare a timer

var timer = NSTimer() 

In your viewDidLoad do set the timer to whatever you like

Here terminateApp will be called after 60 seconds

timer = NSTimer.scheduledTimerWithTimeInterval(60, target: self, selector: Selector("terminateApp"), userInfo: nil, repeats: true)

func terminateApp(){
    // Do your segue and invalidate the timer
    timer.invalidate()
}

But if the user presses the view you want to invalidate the timer and start a new timer, do that by:

In your viewDidLoad add a gestureRecognizer that will call resetTimer when the user touches the screen:

let resetTimer = UITapGestureRecognizer(target: self, action: "resetTimer");
self.view.userInteractionEnabled = true
self.view.addGestureRecognizer(resetTimer)

func resetTimer(){
    // invaldidate the current timer and start a new one
    timer.invalidate()
    timer = NSTimer.scheduledTimerWithTimeInterval(60, target: self, selector: Selector("terminateApp"), userInfo: nil, repeats: true)
}

另一個解法:

My take is that you need to catch the event when user touches a screen. Method: touchesBegan:withEvent

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {

  // get the time measurement

}

Implementing UITapGestureRecognizer for all kind of views will be a workaround solution try with that.

override func viewDidLoad(){
    super.viewDidLoad() 
    let tapRecognizer = UITapGestureRecognizer(target: view, action: "handleSingleTap:")      
    tapRecognizer.numberOfTapsRequired = 1                 
    self.view.addGestureRecognizer(tapRecognizer)
} 

func handleSingleTap(recognizer: UITapGestureRecognizer) {
    //Do something here with the gesture 
} 

For touch began and touch end try with that code by overriding native methods.

override func touchesBegan(touches: Set, withEvent event: UIEvent) {
super.touchesBegan(touches, withEvent: event) 
let touch: UITouch = touches.first as! UITouch
if (touch.view == yourView){ 
   println("touchesBegan | This is an ImageView") 
 }else{ 
   println("touchesBegan | This is not an ImageView") 
 } 
}

touchend func.

override func touchesEnded(touches: Set, withEvent event: UIEvent) { 
   super.touchesMoved(touches, withEvent: event) 
   let touch: UITouch = touches.first as! UITouch 

   if (touch.view == yourView){
      printing("touchesEnded | This is an ImageView")
    }
   else{ 
      println("touchesEnded | This is not an ImageView")
    } 
}

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