我正在使用基于AVPlayer的自定义视频播放器开展项目。试图整合谷歌演员。我已经基于Google tuts进行了整合：https://codelabs.developers.google.com/codelabs/cast-videos-ios/ 但随着转换迅速。一切似乎工作正常，如果投射，如果视频播放器打开，并且有连接的设备（或者如果我从面板连接），我形成文件的元信息，并且它传递给谷歌演员 - 一切正常。
但是，我有一些奇怪的行为： 1）开始投射，打开视频，然后是另一个视频，然后是第三个视频。 2）停止铸造 3）转到另一个视频，启用转换，但它不会启动此视频。它开始播放我之前打开的第一个视频....
我试图找到任何清除缓存或队列的方法，但没有..请帮助
class VideoVC: UIViewController, UIGestureRecognizerDelegate, GCKSessionManagerListener {
var filmTitle: String!
var toPass: String!
var film: MovieDetails!
var filmDetails: Movie!
var sessionManager: GCKSessionManager?
var castSession: GCKCastSession?
var castMediaController: GCKUIMediaController?
var checkPlayed = 0
override func viewDidLoad() {
super.viewDidLoad()
sessionManager = GCKCastContext.sharedInstance().sessionManager
sessionManager?.add(self)
castMediaController = GCKUIMediaController()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if let videoURL = toPass {
if let video = URL(string: videoURL) {
player = AVPlayer(url: video)
player.allowsExternalPlayback = true
player.usesExternalPlaybackWhileExternalScreenIsActive = true
playerController.player = player
self.addChildViewController(playerController)
self.view.addSubview(playerController.view)
playerController.view.frame = self.view.frame
self.view.sendSubview(toBack: playerController.view)
}
}
if isCastEnabled() {
playSelectedItemRemotely()
}
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
player.replaceCurrentItem(with: nil)
}
func buildMediaInformation() -> GCKMediaInformation {
let metaData = GCKMediaMetadata(metadataType: GCKMediaMetadataType(rawValue: 1)!)
metaData.setString(filmTitle, forKey: kGCKMetadataKeyTitle)
if let imageUrl = URL(string: filmDetails.poster_cast!) {
let image = GCKImage(url: imageUrl, width: 340, height: 450)
metaData.addImage(image)
}
if let episode = film.serial_episode, let season = film.serial_season, season != "", episode != "", let title = film.title, title != "" {
let subtitle = "\(title) \(episode) серия \(season) сезон"
metaData.setString(subtitle, forKey: kGCKMetadataKeySubtitle)
}
let duration = Double(film.duration!)
let mediaInfo = GCKMediaInformation(contentID: toPass!,
streamType: GCKMediaStreamType.buffered,
contentType: film.contentType!,
metadata: metaData as GCKMediaMetadata,
streamDuration: duration,
mediaTracks: nil,
textTrackStyle: nil,
customData: nil)
print("toPass: \(toPass!)")
print("duration: \(duration)")
return mediaInfo
}
func playSelectedItemRemotely() {
let castSession = GCKCastContext.sharedInstance().sessionManager.currentCastSession
if (castSession != nil) {
castSession?.remoteMediaClient?.loadMedia(self.buildMediaInformation(), autoplay: true)
self.dismiss(animated: true, completion: nil)
}
else {
print("no castSession!")
}
}
func sessionManager(_ sessionManager: GCKSessionManager, didStart session: GCKSession) {
playSelectedItemRemotely()
}
func sessionManager(_ sessionManager: GCKSessionManager, didResumeSession session: GCKSession) {
}
func sessionManager(_ sessionManager: GCKSessionManager, didEnd session: GCKSession, withError error: Error?) {
let castSession = GCKCastContext.sharedInstance().sessionManager.currentCastSession
castSession?.endAndStopCasting(true)
}
func sessionManager(_ sessionManager: GCKSessionManager, didFailToStart session: GCKSession, withError error: Error) {
Utils.showOverAnyVC("Ошибка подключения", message: "Попробуйте еще раз!")
}
func isCastEnabled() -> Bool {
switch GCKCastContext.sharedInstance().castState {
case GCKCastState.connected:
print("cast connected")
return true
case GCKCastState.connecting:
print("cast connecting")
return true
case GCKCastState.notConnected:
print("cast notConnected")
return false
case GCKCastState.noDevicesAvailable:
print("cast noDevicesAvailable")
return false
}
}}
和我的appdelegate：
class AppDelegate：UIResponder，UIApplicationDelegate，GCKLoggerDelegate，UNUserNotificationCenterDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
let options = GCKCastOptions(receiverApplicationID: "F443E49F")
GCKCastContext.setSharedInstanceWith(options)
GCKLogger.sharedInstance().delegate = self
let appStoryboard = UIStoryboard(name: "NewMain", bundle: nil)
let navigationController = appStoryboard.instantiateViewController(withIdentifier: "MainNavigation")
let castContainerVC: GCKUICastContainerViewController = GCKCastContext.sharedInstance().createCastContainerController(for: navigationController)
castContainerVC.miniMediaControlsItemEnabled = true
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.rootViewController = castContainerVC
self.window?.makeKeyAndVisible()
GCKCastContext.sharedInstance().useDefaultExpandedMediaControls = true
return true
}
func logMessage(_ message: String, fromFunction function: String) {
print("message: \(function)")
}}
答案 0 :(得分：1)
可能的解决方案可能是由于：
sessionManager?.add(self)
您添加了委托，但在任何时候都没有清除它。因此，由于会话管理器保留的引用，VideoVC永远不会被销毁。当您重新打开VideoVC时，会话管理器仍然在您第一次加载时仍然访问该委托。
因此，当调用以下内容时：
func sessionManager(_ sessionManager: GCKSessionManager, didStart session: GCKSession) {
这是在VideoVC的第一个实例中调用的，它现在有错误的文件信息。
您可以通过将print（self）放入上述方法并查看内存指针值来监视此情况。检查它是否与viewDidLoad
<强>更新
为了更好地管理委托，请更改以下方法：viewDidDisappear()
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
player.replaceCurrentItem(with: nil)
//this stops the session manager sending callbacks to your VideoVC
sessionManager.remove(self)
}