Detecting AVPlayer video start stop events - swift

Question

Here is nice simple avplayer piece of code playing a small collection of videos in a queue. My question. I actually want to pause between videos on my queue. Is it possible?
I did note that rate fires twice; status fires just once as does notification.
import UIKit
import AVKit
import AVFoundation
class ViewController: UIViewController {
#IBOutlet weak var VideoView: UIView!
var player:AVQueuePlayer = AVQueuePlayer()
#IBAction func NextSlide(sender: AnyObject) {
player.play()
}
override func viewDidLoad() {
func NextSlide(sender: AnyObject) {
}
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let arrayOfPaths: [String] = ["http://192.100.1.1:8080/dino1.mov","http://192.100.1.1:8080/dino1.mov","http://192.100.1.1:8080/dino1.mov"]
var shots = [AVPlayerItem]()
for item in arrayOfPaths {
let url2adopt = NSURL(string: item)
let avAsset = AVURLAsset(URL: url2adopt!)
let shot = AVPlayerItem(asset: avAsset)
shots.append(shot)
}
player = AVQueuePlayer(items: shots)
let playerLayer = AVPlayerLayer(player: player)
playerLayer.frame = VideoView.layer.bounds
VideoView.layer.addSublayer(playerLayer)
player.addObserver(self, forKeyPath: "status", options: NSKeyValueObservingOptions.New, context: nil)
player.addObserver(self, forKeyPath: "rate", options: NSKeyValueObservingOptions.New, context: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "itemDidFinishPlaying:", name: AVPlayerItemDidPlayToEndTimeNotification, object: player.currentItem)
player.play()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// catch changes to status
override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
if (keyPath == "rate") {
print(player.rate)
}
if (keyPath == "status") {
print(player.status)
}
}
func itemDidFinishPlaying(notification:NSNotification) {
print("finished")
}
}

Answer 1

Add this line:
player.addObserver(
self, forKeyPath:"currentItem", options:.Initial, context:nil)
Now you'll be notified every time there is a change in the queue item currently being played.