GCKSession Class

GCKSession Class Reference

Overview

An abstract base class representing a session with a receiver device.

Subclasses must implement the start (GCKSession(Protected)) and endWithAction: (GCKSession(Protected)) methods, and must call the appropriate notifier methods (for example, notifyDidStartWithSessionID: (GCKSession(Protected))) to indicate corresponding changes in the session state. Subclasses may also implement setDeviceVolume: (GCKSession), setDeviceMuted: (GCKSession) and remoteMediaClient if the device supports such operations.

A session is created and controlled using the session methods in GCKSessionManager, which uses the appropriate GCKDeviceProvider to create the session, and then delegates session requests to that GCKSession object.

Since
3.0

Inherits NSObject.

Inherited by GCKCastSession.

Instance Method Summary

(instancetype) - initWithDevice:traits:sessionID:
 Initializes a new session object for the given device, with default options. More...
 
(instancetype) - initWithDevice:traits:sessionID:sessionOptions:
 Initializes a new session object for the given device. More...
 
(GCKRequest *) - setDeviceVolume:
 Sets the device's volume. More...
 
(GCKRequest *) - setDeviceMuted:
 Sets the device's mute state. More...
 
(void) - start
 Starts the session. More...
 
(void) - endWithAction:
 Ends the session with the specified action. More...
 
(void) - notifyDidStartWithSessionID:
 Called by subclasses to notify the framework that the session has been started. More...
 
(void) - notifyDidFailToStartWithError:
 Called by subclasses to notify the framework that the session has failed to start. More...
 
(void) - notifyDidEndWithError:willTryToResume:
 Called by subclasses to notify the framework that the session has ended. More...
 
(void) - notifyDidReceiveDeviceVolume:muted:
 Called by subclasses to notify the framework that updated device volume and mute state has been received from the device. More...
 
(void) - notifyDidReceiveDeviceStatus:
 Called by subclasses to notify the framework that updated status has been received from the device. More...
 
(void) - notifyDidSuspendWithReason:
 Deprecated, do not use - implemented as a no-op. More...
 
(void) - notifyDidResume
 Deprecated, do not use - implemented as a no-op. More...
 

Property Summary

GCKDevicedevice
 The device that this session is associated with. More...
 
NSString * sessionID
 The current session ID, if any. More...
 
GCKSessionOptions * sessionOptions
 The session options, if any. More...
 
GCKConnectionState connectionState
 The current session connection state. More...
 
BOOL suspended
 A flag indicating whether the session is currently suspended. More...
 
NSString * deviceStatusText
 The current device status text. More...
 
GCKSessionTraitstraits
 The session traits. More...
 
float currentDeviceVolume
 The current device volume, in the range [0.0, 1.0]. More...
 
BOOL currentDeviceMuted
 The current device mute state. More...
 
GCKRemoteMediaClientremoteMediaClient
 The GCKRemoteMediaClient object that can be used to control media playback in this session. More...
 
GCKMediaMetadatamediaMetadata
 The current media metadata, if any. More...
 

Method Detail

- (instancetype) initWithDevice: (GCKDevice *)  device
traits: (GCKSessionTraits *__nullable)  traits
sessionID: (NSString *__nullable)  sessionID 

Initializes a new session object for the given device, with default options.

Parameters
deviceThe device.
traitsThe session traits.
sessionIDThe session ID of an existing session, if this object will be used to resume a session; otherwise nil if it will be used to start a new session.
- (instancetype) initWithDevice: (GCKDevice *)  device
traits: (GCKSessionTraits *__nullable)  traits
sessionID: (NSString *__nullable)  sessionID
sessionOptions: (GCKSessionOptions *__nullable)  sessionOptions 

Initializes a new session object for the given device.

Parameters
deviceThe device.
traitsThe session traits.
sessionIDThe session ID of an existing session, if this object will be used to resume a session; otherwise nil if it will be used to start a new session.
sessionOptionsThe session options, if any; otherwise nil.
Since
4.0
- (GCKRequest *) setDeviceVolume: (float)  volume

Sets the device's volume.

This is an asynchronous operation. The default implementation is a no-op that fails the request with a GCKErrorCodeUnsupportedFeature error.

Parameters
volumeThe new volume.
Returns
A GCKRequest object for tracking the request.
Since
3.4; in previous framework versions, this method returned void.
- (GCKRequest *) setDeviceMuted: (BOOL)  muted

Sets the device's mute state.

This is an asynchronous operation. The default implementation is a no-op that fails the request with a GCKErrorCodeUnsupportedFeature error.

Parameters
mutedThe new mute state.
Returns
A GCKRequest object for tracking the request.
Since
3.4; in previous framework versions, this method returned void.
- (void) start

Starts the session.

This is an asynchronous operation. Must be overridden by subclasses.

Provided by category GCKSession(Protected).

- (void) endWithAction: (GCKSessionEndAction action

Ends the session with the specified action.

This is an asynchronous operation. Must be overridden by subclasses.

Parameters
actionThe action to take when ending the session; see GCKSessionEndAction for more details.

Provided by category GCKSession(Protected).

- (void) notifyDidStartWithSessionID: (NSString *)  sessionID

Called by subclasses to notify the framework that the session has been started.

Parameters
sessionIDThe session's unique ID.

Provided by category GCKSession(Protected).

- (void) notifyDidFailToStartWithError: (NSError *)  error

Called by subclasses to notify the framework that the session has failed to start.

Parameters
errorThe error that occurred.

Provided by category GCKSession(Protected).

- (void) notifyDidEndWithError: (NSError *__nullable)  error
willTryToResume: (BOOL)  willTryToResume 

Called by subclasses to notify the framework that the session has ended.

Parameters
errorThe error that caused the session to end, if any. Should be nil if the session was ended intentionally.
willTryToResumeWhether the session will try to resume itself automatically.

Provided by category GCKSession(Protected).

- (void) notifyDidReceiveDeviceVolume: (float)  volume
muted: (BOOL)  muted 

Called by subclasses to notify the framework that updated device volume and mute state has been received from the device.

Parameters
volumeThe device's current volume. Must be in the range [0, 1.0];
mutedThe device's current mute state.

Provided by category GCKSession(Protected).

- (void) notifyDidReceiveDeviceStatus: (NSString *__nullable)  statusText

Called by subclasses to notify the framework that updated status has been received from the device.

Parameters
statusTextThe new status.

Provided by category GCKSession(Protected).

- (void) notifyDidSuspendWithReason: (GCKConnectionSuspendReason reason

Deprecated, do not use - implemented as a no-op.

Deprecated:
Do not call.

Provided by category GCKSession(Protected).

- (void) notifyDidResume

Deprecated, do not use - implemented as a no-op.

Deprecated:
Do not call.

Provided by category GCKSession(Protected).

Property Detail

- (GCKDevice*) device
readnonatomicstrong

The device that this session is associated with.

- (NSString*) sessionID
readnonatomiccopy

The current session ID, if any.

- (GCKSessionOptions*) sessionOptions
readnonatomicstrong

The session options, if any.

Since
4.0
- (GCKConnectionState) connectionState
readnonatomicassign

The current session connection state.

- (BOOL) suspended
readnonatomicassign

A flag indicating whether the session is currently suspended.

Deprecated:
GCKSession no longer supports being in suspended state. If needed, move this functionality to a subclass.
- (NSString*) deviceStatusText
readnonatomiccopy

The current device status text.

- (GCKSessionTraits*) traits
readnonatomiccopy

The session traits.

- (float) currentDeviceVolume
readnonatomicassign

The current device volume, in the range [0.0, 1.0].

- (BOOL) currentDeviceMuted
readnonatomicassign

The current device mute state.

- (GCKRemoteMediaClient*) remoteMediaClient
readnonatomicstrong

The GCKRemoteMediaClient object that can be used to control media playback in this session.

It is nil before the session has started, or if the session does not support the GCKRemoteMediaClient API. Subclasses which provide a GCKRemoteMediaClient interface must override the getter method.

- (GCKMediaMetadata*) mediaMetadata
readnonatomicstrong

The current media metadata, if any.

Will be nil if the session does not support the media namespace or if no media is currently loaded on the receiver.