ios - How does one add a callback or get a notification when play is tapped? -

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i have added video view using following code:

let url = nsbundle.mainbundle().urlforresource("etude", withextension:"mp4") player = avplayer(url: url!)   let playerviewcontroller = avplayerviewcontroller() playerviewcontroller.player = player playerviewcontroller.view.frame = cgrect(x: xpos, y: ypos, width: videowidth, height: videoheight) self.view.addsubview(playerviewcontroller.view) self.addchildviewcontroller(playerviewcontroller)

i have other events trigger when user taps play button on player. there way set call when happens or perhaps add observer detect it?

yes can register key-value-observing playerviewcontroller.player.rate.

looks 

self.player.addobserver(observer:self,keypath:"rate",options:0,context:nil)

then implement

func observevalueforkeypath(_ keypath: string?,                    ofobject object: anyobject?,                      change change: [string : anyobject]?,                     context context: unsafemutablepointer<void>) {   if(self.player.rate==1){      print("playing")   }else if(self.player.rate == 0){      print("stopped")   } }

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