Errors while implementing Chromecast in swift 3 - ios

Question

I seem to have a problem implementing ChromeCast features in a project of mine.
I have been trying to implement the GCKDeviceScannerListener Singleton Class on a UIViewController, however its delegate methods are not getting called.
The deviceDidComeOnline method of GCKDeviceScannerListener never gets called.
Instead I have a bunch of error displayed by the chromeCast logger as followed:
+[NSMutableDictionary(GCKAdditions) gck_loadFromCacheWithName:] - Device cache file file:///Users/martin/Library/Developer/CoreSimulator/Devices/318D2E15-C4B0-47D2-97AF-CD560A6063AE/data/Containers/Data/Application/C117BB98-88DA-4586-B119-0683DAD82FEB/Library/Caches/gck_nearby_devices.plist doesn't exist.
+[NSMutableDictionary(GCKAdditions) gck_loadFromCacheWithName:] - Device cache file file:///Users/martin/Library/Developer/CoreSimulator/Devices/318D2E15-C4B0-47D2-97AF-CD560A6063AE/data/Containers/Data/Application/C117BB98-88DA-4586-B119-0683DAD82FEB/Library/Caches/gck_network_cache.plist doesn't exist.
scanning started
+[NSMutableDictionary(GCKAdditions) gck_deleteCacheWithName:] - Device cache file file:///Users/martin/Library/Developer/CoreSimulator/Devices/318D2E15-C4B0-47D2-97AF-CD560A6063AE/data/Containers/Data/Application/C117BB98-88DA-4586-B119-0683DAD82FEB/Library/Caches/gck_device_cache.plist doesn't exist.
+[NSMutableDictionary(GCKAdditions) gck_deleteCacheWithName:] - Device cache file file:///Users/martin/Library/Developer/CoreSimulator/Devices/318D2E15-C4B0-47D2-97AF-CD560A6063AE/data/Containers/Data/Application/C117BB98-88DA-4586-B119-0683DAD82FEB/Library/Caches/gck_device_cache_v1.plist doesn't exist.
+[NSMutableDictionary(GCKAdditions) gck_deleteCacheWithName:] - Device cache file file:///Users/martin/Library/Developer/CoreSimulator/Devices/318D2E15-C4B0-47D2-97AF-CD560A6063AE/data/Containers/Data/Application/C117BB98-88DA-4586-B119-0683DAD82FEB/Library/Caches/gck_device_cache_v2.plist doesn't exist.
+[NSMutableDictionary(GCKAdditions) gck_loadFromCacheWithName:] - Device cache file
file:///Users/martin/Library/Developer/CoreSimulator/Devices/318D2E15-C4B0-47D2-97AF-CD560A6063AE/data/Containers/Data/Application/C117BB98-88DA-4586-B119-0683DAD82FEB/Library/Caches/gck_device_cache_v3.plist doesn't exist
I can't seem to figure out why I have these errors. But it seems that the deviceScanner never even finds my receiver device.
My viewController code is:
class ChromeCastViewController: UIViewController, GCKDeviceScannerListener, GCKDeviceManagerDelegate, GCKMediaControlChannelDelegate{
fileprivate let kCancelTitle = "Cancel"
fileprivate let kDisconnectTitle:String! = "Disconnect"
// Publicly available receiver to demonstrate sending messages - replace this with your
// own custom app ID.
fileprivate let kReceiverAppID = "XXXXXXXXX"
fileprivate lazy var btnImage:UIImage = {
return UIImage(named: "icon-cast-identified.png")!
}()
fileprivate lazy var btnImageselected:UIImage = {
return UIImage(named: "icon-cast-connected.png")!
}()
fileprivate var deviceScanner:GCKDeviceScanner?
fileprivate var deviceManager:GCKDeviceManager?
fileprivate var mediaInformation:GCKMediaInformation?
fileprivate var selectedDevice:GCKDevice?
#IBOutlet weak var googleCastButton: UIBarButtonItem!
#IBOutlet weak var backButton: UIBarButtonItem!
#IBAction func backAction(_ sender: Any) {
dismiss(animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
self.startScan()
}
func startScan() {
let filterCriteria = GCKFilterCriteria(forAvailableApplicationWithID: kReceiverAppID)
self.deviceScanner = GCKDeviceScanner(filterCriteria: filterCriteria)
if let deviceScanner = self.deviceScanner {
deviceScanner.add(self)
deviceScanner.startScan()
print("scanning started")
deviceScanner.passiveScan = true
}
}
// MARK: GCKDeviceScannerListener
func deviceDidComeOnline(_ device: GCKDevice) {
print("deviceDidComeOnline")
print("Device found: \(device.friendlyName)");
self.updateButtonStates()
}
func deviceDidGoOffline(_ device: GCKDevice) {
print("deviceDidGoOffline()")
print("Device went away: \(device.friendlyName)");
self.updateButtonStates()
}
func deviceDidChange(_ device: GCKDevice) {
print("deviceDidChange()");
}
func updateButtonStates() {
print("updateButton")
if (deviceScanner!.devices.count > 0) {
// Show the Cast button.
navigationItem.rightBarButtonItems = [googleCastButton!]
if (deviceManager != nil && deviceManager?.connectionState == GCKConnectionState.connected) {
// Show the Cast button in the enabled state.
googleCastButton!.tintColor = UIColor.blue
} else {
// Show the Cast button in the disabled state.
googleCastButton!.tintColor = UIColor.gray
}
} else{
// Don't show Cast button.
navigationItem.rightBarButtonItems = []
}
}
}
Thank you in advance for any help or tips you can give me.
Best regards
UPDATE:
I have modified my code base to follow google v3 guidelines.
I now instantiate a GCKCastContext in AppDelegate in order to use google widgets.
But It seems that GCKCastContext or functionalities associated with the singleton are never called after initialising it. I have tried to add the GCKDiscoveryManagerListener to my AppDelegate to see if was detecting my ChromeCast device.
The code for my AppDelegate is :
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, GCKLoggerDelegate,GCKDiscoveryManagerListener {
var window: UIWindow?
fileprivate let kReceiverAppID = "XXXXXXXXXX"
var discoveryManager: GCKDiscoveryManager
override init(){
let options:GCKCastOptions = GCKCastOptions(receiverApplicationID: kReceiverAppID)
GCKCastContext.setSharedInstanceWith(options)
self.discoveryManager = GCKCastContext.sharedInstance().discoveryManager
super.init()
self.discoveryManager.add(self)
self.discoveryManager.passiveScan = true
self.discoveryManager.startDiscovery()
GCKLogger.sharedInstance().delegate = self
}
.....
func log(fromFunction function: UnsafePointer<Int8>, message: String) {
let functionName = String(cString: function)
print(functionName + " - " + message);
}
func didUpdateDeviceList() {
print("didUpdateDeviceList with \(discoveryManager.deviceCount) devices")
(0..<discoveryManager.deviceCount).forEach { index in
print(index, discoveryManager.device(at: index))
}
}
func didStartDiscoveryForDeviceCategory(deviceCategory: String) {
print("GCKDiscoveryManagerListener: \(deviceCategory)")
print("FOUND: \(self.discoveryManager.hasDiscoveredDevices)")
}
func willUpdateDeviceList(){
print("will update device was called")
}
}
The functions didUpdateDeviceList, didStartDiscoveryForDeviceCategory
, willUpdateDeviceList are never called, meaning no Chrome device is ever found making the widgets unusable.
Thank again for any help