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Version: iOS SDK v1.0.12

Global Notifications

VideoKitCore offers a variety of global notifications sent through NSNotification that give you the flexibility to react on certain events.

.VKSessionStateChanged​

This notification is fired after the session state changed. This could be the case after an authentication attempt or logout.

Register an observer for session state changes:

NotificationCenter.default.addObserver(self, selector:  #selector(self.stateChanged(_:)), name: .VKAccountStateChanged, object: nil)

React on changed states:

func stateChanged(_ notification: NSNotification? = nil) {
    DispatchQueue.main.async {
        if let sessionData = notification?.userInfo?["sessionData"] as? [String: Any] {
            print(sessionData)
        }
        
        if VKSession.current.state == .connected {
            // self.sessionConnected()
        }
        else if VKSession.current.state == .disconnected {
            // self.sessionDisconnected()
        }
        else if VKSession.current.state == .error {
            // self.sessionError()
        }
        else if VKSession.current.state == .connecting {
            // self.sessionConnecting()
        }
    }
}

.VKVideoUploadsUpdated​

Triggered after video uploading has made some progress (upload started, progress, or finished). Userinfo is empty.

You can access all uploads through VKUploads.shared.uploads.

NotificationCenter.default.addObserver(self, selector:  #selector(self.handleVideoUploadsUpdate(_:)), name: .VKVideoUploadsUpdated, object: nil)
@objc func handleVideoUploadsUpdate(notification: Notification) {
    let info = VKVideoUploads.shared.uploads.map({ upload in
        return "\(upload.progress) \(upload.isCompressed)"
    })
    
    print("Upload progress: \(info)")
}

Use this notification if your app can have multiple uploads at the same time and you want to handle their progress simultaneously.

.VKVideoUploadProgress​

Retrieve uploading progress for each video upload individually:

NotificationCenter.default.addObserver(forName: .VKVideoUploadProgress, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let upload: VKUpload as userInfo["upload"] as? VKUpload {
        print(upload.videoID)
        print(upload.progress)
    }
}

Notification.userInfo​

[
    "upload": VKUpload
]

.VKVideoUploadComplete​

Upload is complete:

NotificationCenter.default.addObserver(forName: .VKVideoUploadComplete, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let upload: VKUpload as userInfo["upload"] as? VKUpload {
        print("Video has been uploaded: ")
        print(upload.videoID)
        print(upload.progress)
    }
}

Notification.userInfo​

[
    "upload": VKUpload
]

.VKVideoUploadFailed​

NotificationCenter.default.addObserver(forName: .VKVideoUploadFailed, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let videoID as userInfo["videoID"] as? String {
        print("Uploading failed for video \(videoID).")
    }
}

Notification.userInfo​

[
    "videoID": String,
    "error": Error
]

.VKVideoUploadCanceled​

NotificationCenter.default.addObserver(forName: .VKVideoUploadCanceled, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let videoID as userInfo["videoID"] as? String {
        print("Uploading cancelled for video \(videoID).")
    }
}

Notification.userInfo​

[
    "videoID": String
]

.VKVideoIsUploaded​

NotificationCenter.default.addObserver(forName: .VKVideoIsUploaded, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let videoID as userInfo["videoID"] as? String {
        print("Video \(videoID) was uploaded.")
    }
}

Notification.userInfo​

[
    "videoID": String
]

.VKVideoUploadStarted​

NotificationCenter.default.addObserver(forName: .VKVideoUploadStarted, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let videoID as userInfo["videoID"] as? String {
        print("Video \(videoID) started uploading..")
    }
}

Notification.userInfo​

[
    "videoID": String
]

.VKVideoRecordingFailed​

NotificationCenter.default.addObserver(self, selector:  #selector(self.recordingFailed(_:)), name: .VKVideoRecordingFailed, object: nil)

.VKPlaylistUpdated​

Called if any of our Playlists (VKPlaylist) are updated with new videos.

NotificationCenter.default.addObserver(forName: .VKPlaylistUpdated, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let playlist = userInfo["playlist"] as? VKPlaylist {
        print("Updated playlist has \(playlist.count) videos.")
    }
}

Notification.userInfo​

[
    "playlist": self, 
    "newIndexes": [Int], 
    "oldIndexes" : [Int], 
    "newCount": Int, 
    "localVideo": Bool
]

.VKVideoPlaybackFailed​

Called if VKPlayerViewController has trouble playing the video.

NotificationCenter.default.addObserver(forName: .VKVideoPlaybackFailed, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let error = userInfo["error"] as? Error, let videoId = userInfo["videoID"] as? String {
        print("There was an error playing video with id \(videoId).")
        print(error.localizedDescription)
    }
}

Notification.userInfo​

[
    "error": Error,
    "videoID": String
]

.VKMetadataValidationError​

Triggered if you change the metadata for VKVideo and validation failed.

NotificationCenter.default.addObserver(self, selector:  #selector(self.metadataValidationError(_:)), name: .VKMetadataValidationError, object: nil)

.VKVideoClipsWereMerged​

Triggered after the recorder merged your video clips.

Only triggered if auto merging is active, not if you manually trigger mergeClips() 

NotificationCenter.default.addObserver(forName: .VKVideoClipsWereMerged, object: self, queue: nil) { [weak self] (notification) in
    let userInfo = notification.userInfo
    
    if let url = userInfo["url"] as? URL {
        print("Merged video is located at \(url.absoluteString).")
    }
}

Notification.userInfo​

[
    "url": URL
]

.VKStreamCreated​

Triggered after the stream was created 

NotificationCenter.default.addObserver(forName: .VKStreamCreated, object: self, queue: nil) { (notification) in
            let userInfo = notification.userInfo
            
            if let stream = userInfo?["stream"] as? VKStream {
                print("Stream with id \(stream.id) and push url \(stream.input[.url] ?? "unknown") was created.")
                print(stream)
            }
        }

Notification.userInfo​

[
    "stream": VKStream
]

.VKStreamDeleted​

Triggered after the stream was removed 

NotificationCenter.default.addObserver(forName: .VKStreamDeleted, object: self, queue: nil) { (notification) in
    let userInfo = notification.userInfo
    
    if let streamId = userInfo?["streamId"] as? String {
        print("Stream with id \(streamId) was removed.")
    }
}

Notification.userInfo​

[
    "streamId": String
]
Last updated on by Nikita Gaer