Initial persistency set-up

The application must access the OTVPersistenceManager and set up the listeners; this only has to be done once, before any other persistence operation. Calling OTVPersistenceManager.sharedManager() for the first time initialises the OTVPersistenceManager object. The manager can then discover persistent assets stored in previous runs of the application.

Example code

Create or access the download manager

The following code example shows how to gain access to the download manager.

CODE

let dlManager = OTVPersistenceManager.sharedManager

Register listeners

To follow the state and progress of downloads, listeners (observers) should be attached with the NotificationCenter.

CODE

NotificationCenter.default.addObserver(self,
                                        selector: #selector(self.storeStateNotification),
                                        name: .OTVAssetDownloadStateChanged,
                                        object: nil)

  NotificationCenter.default.addObserver(self,
                                        selector: #selector(self.storeProgressNotification),
                                        name: .OTVAssetDownloadProgress,
                                        object: nil)

  @objc func storeStateNotification(notification: NSNotification) {
    if let info = notification.userInfo as? [String: Any] {
      let state = info[OTVPersistenceAsset.Keys.downloadState] as? String
      let name = info[OTVPersistenceAsset.Keys.name] as? String
    }
  }
  
  @objc func storeProgressNotification(notification: NSNotification) {
    if let info = notification.userInfo as? [String: Any] {
      let title = info[OTVPersistenceAsset.Keys.name] as? String
      let percent = info[OTVPersistenceAsset.Keys.percentDownloaded] as? Double
    }
  }

Next step:

For clear content, you can start the download.
For FPS encrypted content, you may need to retrieve the licence if the content identifier is known. Otherwise, you need to create an instance of OTVLicenseDelegate and set it to OTVPersistenceManager to start the download.