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ViewController.swift
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ViewController.swift
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//
// ViewController.swift
// VideoQuickStart
//
// Copyright © 2016-2017 Twilio, Inc. All rights reserved.
//
import UIKit
import TwilioVideo
class ViewController: UIViewController {
// MARK: View Controller Members
// Configure access token manually for testing, if desired! Create one manually in the console
// at https://www.twilio.com/user/account/video/dev-tools/testing-tools
var accessToken = "TWILIO_ACCESS_TOKEN"
// Configure remote URL to fetch token from
var tokenUrl = "http://localhost:8000/token.php"
// Video SDK components
var room: TVIRoom?
var camera: TVICameraCapturer?
var localVideoTrack: TVILocalVideoTrack?
var localAudioTrack: TVILocalAudioTrack?
var participant: TVIParticipant?
var remoteView: TVIVideoView?
// MARK: UI Element Outlets and handles
// `TVIVideoView` created from a storyboard
@IBOutlet weak var previewView: TVIVideoView!
@IBOutlet weak var connectButton: UIButton!
@IBOutlet weak var disconnectButton: UIButton!
@IBOutlet weak var messageLabel: UILabel!
@IBOutlet weak var roomTextField: UITextField!
@IBOutlet weak var roomLine: UIView!
@IBOutlet weak var roomLabel: UILabel!
@IBOutlet weak var videoButton: UIButton!
// MARK: UIViewController
override func viewDidLoad() {
super.viewDidLoad()
if PlatformUtils.isSimulator {
self.previewView.removeFromSuperview()
} else {
// Preview our local camera track in the local video preview view.
self.startPreview()
}
// Disconnect and mic button will be displayed when the Client is connected to a Room.
self.disconnectButton.isHidden = true
self.videoButton.isHidden = true
self.roomTextField.delegate = self
let tap = UITapGestureRecognizer(target: self, action: #selector(ViewController.dismissKeyboard))
self.view.addGestureRecognizer(tap)
}
func setupRemoteVideoView() {
// Creating `TVIVideoView` programmatically
self.remoteView = TVIVideoView.init(frame: CGRect.zero, delegate:self)
self.view.insertSubview(self.remoteView!, at: 0)
// `TVIVideoView` supports scaleToFill, scaleAspectFill and scaleAspectFit
// scaleAspectFit is the default mode when you create `TVIVideoView` programmatically.
self.remoteView!.contentMode = .scaleAspectFit;
let centerX = NSLayoutConstraint(item: self.remoteView!,
attribute: NSLayoutAttribute.centerX,
relatedBy: NSLayoutRelation.equal,
toItem: self.view,
attribute: NSLayoutAttribute.centerX,
multiplier: 1,
constant: 0);
self.view.addConstraint(centerX)
let centerY = NSLayoutConstraint(item: self.remoteView!,
attribute: NSLayoutAttribute.centerY,
relatedBy: NSLayoutRelation.equal,
toItem: self.view,
attribute: NSLayoutAttribute.centerY,
multiplier: 1,
constant: 0);
self.view.addConstraint(centerY)
let width = NSLayoutConstraint(item: self.remoteView!,
attribute: NSLayoutAttribute.width,
relatedBy: NSLayoutRelation.equal,
toItem: self.view,
attribute: NSLayoutAttribute.width,
multiplier: 1,
constant: 0);
self.view.addConstraint(width)
let height = NSLayoutConstraint(item: self.remoteView!,
attribute: NSLayoutAttribute.height,
relatedBy: NSLayoutRelation.equal,
toItem: self.view,
attribute: NSLayoutAttribute.height,
multiplier: 1,
constant: 0);
self.view.addConstraint(height)
}
// MARK: IBActions
@IBAction func connect(sender: AnyObject) {
// Configure access token either from server or manually.
// If the default wasn't changed, try fetching from server.
if (accessToken == "TWILIO_ACCESS_TOKEN") {
do {
accessToken = try TokenUtils.fetchToken(url: tokenUrl)
} catch {
let message = "Failed to fetch access token"
logMessage(messageText: message)
return
}
}
// Prepare local media which we will share with Room Participants.
self.prepareLocalMedia()
// Preparing the connect options with the access token that we fetched (or hardcoded).
let connectOptions = TVIConnectOptions.init(token: accessToken) { (builder) in
// Use the local media that we prepared earlier.
builder.audioTracks = self.localAudioTrack != nil ? [self.localAudioTrack!] : [TVILocalAudioTrack]()
builder.videoTracks = self.localVideoTrack != nil ? [self.localVideoTrack!] : [TVILocalVideoTrack]()
// The name of the Room where the Client will attempt to connect to. Please note that if you pass an empty
// Room `name`, the Client will create one for you. You can get the name or sid from any connected Room.
builder.roomName = self.roomTextField.text
}
// Connect to the Room using the options we provided.
room = TwilioVideo.connect(with: connectOptions, delegate: self)
logMessage(messageText: "Attempting to connect to room \(String(describing: self.roomTextField.text))")
self.showRoomUI(inRoom: true)
self.dismissKeyboard()
}
@IBAction func disconnect(sender: AnyObject) {
self.room!.disconnect()
logMessage(messageText: "Attempting to disconnect from room \(room!.name)")
}
@IBAction func toggleVideo(sender: AnyObject) {
let localParticipator = room?.localParticipant;
if (localParticipator?.videoTracks.count == 0) {
self.camera = TVICameraCapturer()
let constraints = TVIVideoConstraints(block: { (builder: TVIVideoConstraintsBuilder) in
builder.aspectRatio = TVIAspectRatio16x9
})
localVideoTrack = TVILocalVideoTrack(capturer: camera!, enabled: true, constraints: constraints)
if let unwrVideo = localVideoTrack {
// localParticipator is obtained from room object
localParticipator?.addVideoTrack(unwrVideo)
unwrVideo.addRenderer(self.previewView)
self.previewView.isHidden = false
self.videoButton.setTitle("Remove Video", for: .normal)
}
} else {
localParticipator?.removeVideoTrack(localVideoTrack!)
localVideoTrack?.removeRenderer(self.previewView)
localVideoTrack = nil
self.previewView.isHidden = true
self.videoButton.setTitle("Add Video", for: .normal)
}
}
// MARK: Private
func startPreview() {
if PlatformUtils.isSimulator {
return
}
// Preview our local camera track in the local video preview view.
camera = TVICameraCapturer()
let constraints = TVIVideoConstraints(block: { (builder: TVIVideoConstraintsBuilder) in
builder.aspectRatio = TVIAspectRatio16x9
})
localVideoTrack = TVILocalVideoTrack(capturer: camera!, enabled: true, constraints: constraints)
if (localVideoTrack == nil) {
logMessage(messageText: "Failed to create video track")
} else {
// Add renderer to video track for local preview
localVideoTrack!.addRenderer(self.previewView)
logMessage(messageText: "Video track created")
// We will flip camera on tap.
let tap = UITapGestureRecognizer(target: self, action: #selector(ViewController.flipCamera))
self.previewView.addGestureRecognizer(tap)
}
}
func flipCamera() {
if (self.camera?.source == .frontCamera) {
self.camera?.selectSource(.backCameraWide)
} else {
self.camera?.selectSource(.frontCamera)
}
}
func prepareLocalMedia() {
// We will share local audio and video when we connect to the Room.
// Create an audio track.
if (localAudioTrack == nil) {
localAudioTrack = TVILocalAudioTrack.init()
if (localAudioTrack == nil) {
logMessage(messageText: "Failed to create audio track")
}
}
// Create a video track which captures from the camera.
if (localVideoTrack == nil) {
self.startPreview()
}
}
// Update our UI based upon if we are in a Room or not
func showRoomUI(inRoom: Bool) {
self.connectButton.isHidden = inRoom
self.roomTextField.isHidden = inRoom
self.roomLine.isHidden = inRoom
self.roomLabel.isHidden = inRoom
self.videoButton.isHidden = !inRoom
self.disconnectButton.isHidden = !inRoom
UIApplication.shared.isIdleTimerDisabled = inRoom
}
func dismissKeyboard() {
if (self.roomTextField.isFirstResponder) {
self.roomTextField.resignFirstResponder()
}
}
func cleanupRemoteParticipant() {
if ((self.participant) != nil) {
if ((self.participant?.videoTracks.count)! > 0) {
self.participant?.videoTracks[0].removeRenderer(self.remoteView!)
self.remoteView?.removeFromSuperview()
self.remoteView = nil
}
}
self.participant = nil
}
func logMessage(messageText: String) {
messageLabel.text = messageText
}
}
// MARK: UITextFieldDelegate
extension ViewController : UITextFieldDelegate {
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
self.connect(sender: textField)
return true
}
}
// MARK: TVIRoomDelegate
extension ViewController : TVIRoomDelegate {
func didConnect(to room: TVIRoom) {
// At the moment, this example only supports rendering one Participant at a time.
logMessage(messageText: "Connected to room \(room.name) as \(String(describing: room.localParticipant?.identity))")
if (room.participants.count > 0) {
self.participant = room.participants[0]
self.participant?.delegate = self
}
}
func room(_ room: TVIRoom, didDisconnectWithError error: Error?) {
logMessage(messageText: "Disconncted from room \(room.name), error = \(String(describing: error))")
self.cleanupRemoteParticipant()
self.room = nil
self.showRoomUI(inRoom: false)
}
func room(_ room: TVIRoom, didFailToConnectWithError error: Error) {
logMessage(messageText: "Failed to connect to room with error")
self.room = nil
self.showRoomUI(inRoom: false)
}
func room(_ room: TVIRoom, participantDidConnect participant: TVIParticipant) {
if (self.participant == nil) {
self.participant = participant
self.participant?.delegate = self
}
logMessage(messageText: "Room \(room.name), Participant \(participant.identity) connected")
}
func room(_ room: TVIRoom, participantDidDisconnect participant: TVIParticipant) {
if (self.participant == participant) {
cleanupRemoteParticipant()
}
logMessage(messageText: "Room \(room.name), Participant \(participant.identity) disconnected")
}
}
// MARK: TVIParticipantDelegate
extension ViewController : TVIParticipantDelegate {
func participant(_ participant: TVIParticipant, addedVideoTrack videoTrack: TVIVideoTrack) {
logMessage(messageText: "Participant \(participant.identity) added video track")
if (self.participant == participant) {
setupRemoteVideoView()
videoTrack.addRenderer(self.remoteView!)
}
}
func participant(_ participant: TVIParticipant, removedVideoTrack videoTrack: TVIVideoTrack) {
logMessage(messageText: "Participant \(participant.identity) removed video track")
if (self.participant == participant) {
videoTrack.removeRenderer(self.remoteView!)
self.remoteView?.removeFromSuperview()
self.remoteView = nil
}
}
func participant(_ participant: TVIParticipant, addedAudioTrack audioTrack: TVIAudioTrack) {
logMessage(messageText: "Participant \(participant.identity) added audio track")
}
func participant(_ participant: TVIParticipant, removedAudioTrack audioTrack: TVIAudioTrack) {
logMessage(messageText: "Participant \(participant.identity) removed audio track")
}
func participant(_ participant: TVIParticipant, enabledTrack track: TVITrack) {
var type = ""
if (track is TVIVideoTrack) {
type = "video"
} else {
type = "audio"
}
logMessage(messageText: "Participant \(participant.identity) enabled \(type) track")
}
func participant(_ participant: TVIParticipant, disabledTrack track: TVITrack) {
var type = ""
if (track is TVIVideoTrack) {
type = "video"
} else {
type = "audio"
}
logMessage(messageText: "Participant \(participant.identity) disabled \(type) track")
}
}
// MARK: TVIVideoViewDelegate
extension ViewController : TVIVideoViewDelegate {
func videoView(_ view: TVIVideoView, videoDimensionsDidChange dimensions: CMVideoDimensions) {
self.view.setNeedsLayout()
}
}
// MARK: TVICameraCapturerDelegate
extension ViewController : TVICameraCapturerDelegate {
func cameraCapturer(_ capturer: TVICameraCapturer, didStartWith source: TVICameraCaptureSource) {
self.previewView.shouldMirror = (source == .frontCamera)
}
}