AVKit Changes for Swift

	Declaration
From	class AVPlayerViewController : UIViewController { var player: AVPlayer! var showsPlaybackControls: Bool var videoGravity: String! var readyForDisplay: Bool { get } var videoBounds: CGRect { get } var contentOverlayView: UIView! { get } } extension AVPlayerViewController { class func preparePrerollAds() func playPrerollAdWithCompletionHandler(_ completionHandler: ((NSError!) -> Void)!) func cancelPreroll() }
To	class AVPlayerViewController : UIViewController { var player: AVPlayer? var showsPlaybackControls: Bool var videoGravity: String var readyForDisplay: Bool { get } var videoBounds: CGRect { get } var contentOverlayView: UIView? { get } var allowsPictureInPicturePlayback: Bool weak var delegate: AVPlayerViewControllerDelegate? } extension AVPlayerViewController { class func preparePrerollAds() func playPrerollAdWithCompletionHandler(_ completionHandler: ((NSError!) -> Void)!) func cancelPreroll() }

Declaration

From

class AVPlayerViewController : UIViewController {
    var player: AVPlayer!
    var showsPlaybackControls: Bool
    var videoGravity: String!
    var readyForDisplay: Bool { get }
    var videoBounds: CGRect { get }
    var contentOverlayView: UIView! { get }
}
extension AVPlayerViewController {
    class func preparePrerollAds()
    func playPrerollAdWithCompletionHandler(_ completionHandler: ((NSError!) -> Void)!)
    func cancelPreroll()
}

class AVPlayerViewController : UIViewController {
    var player: AVPlayer?
    var showsPlaybackControls: Bool
    var videoGravity: String
    var readyForDisplay: Bool { get }
    var videoBounds: CGRect { get }
    var contentOverlayView: UIView? { get }
    var allowsPictureInPicturePlayback: Bool
    weak var delegate: AVPlayerViewControllerDelegate?
}
extension AVPlayerViewController {
    class func preparePrerollAds()
    func playPrerollAdWithCompletionHandler(_ completionHandler: ((NSError!) -> Void)!)
    func cancelPreroll()
}

Modified AVPlayerViewController.contentOverlayView

	Declaration
From	var contentOverlayView: UIView! { get }
To	var contentOverlayView: UIView? { get }

Modified AVPlayerViewController.player

	Declaration
From	var player: AVPlayer!
To	var player: AVPlayer?

Modified AVPlayerViewController.videoGravity

	Declaration
From	var videoGravity: String!
To	var videoGravity: String