PaulWall43

NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)

PaulWall43

//
//  RightLeftTableViewCell.swift
//  TableViewCellsSwipeStuff
//
//  Created by Paul Wallace on 2/26/18.
//  Copyright © 2018 Paul Wallace. All rights reserved.
//

import UIKit

PaulWall43

func createThumbnailOfVideoFromRemoteUrl(url: String) -> UIImage? {
    let asset = AVAsset(url: URL(string: url)!)
    let assetImgGenerate = AVAssetImageGenerator(asset: asset)
    assetImgGenerate.appliesPreferredTrackTransform = true
    //Can set this to improve performance if target size is known before hand
    //assetImgGenerate.maximumSize = CGSize(width,height)
    let time = CMTimeMakeWithSeconds(1.0, 600)
    do {
        let img = try assetImgGenerate.copyCGImage(at: time, actualTime: nil)
        let thumbnail = UIImage(cgImage: img)

PaulWall43

//In our viewWillAppear configure the session to run with these settings
override func viewWillAppear(_ animated: Bool) {
  //Standard tracking configuration
  let configuration = ARWorldTrackingConfiguration()
  //We want to detect all horizontal planes (i.e. the floor)
  configuration.planeDetection = .horizontal
  //Set the delegate to be self so we can be updated when relevant things happen
  session.delegate = self
  //Run the session using this configuration (no options for this) 
  session.run(configuration, options: [])

PaulWall43

//After running the session we add a light node to help the scene look a little better
override func viewDidAppear(_ animated: Bool) {
  super.viewDidAppear(animated)
  //Create light object 
  let light = SCNLight()
  //Set type to be ambient 
  light.type = .ambient
  //Create corresponding node for light so we can add this into the scene graph
  let ambientLightNode = SCNNode()
  //Set position (won't change over course of session run). Note that position doens't matter for ambient light. 

PaulWall43

//Add the sofa to the plane if possible when the screen is tapped
@IBAction func screenTapped(_ sender: UITapGestureRecognizer) {
  //Get the location of the tap on screen
  let location = sender.location(in: sceneView)
  //Make sure that we do the follow stuff on a background queue as to make sure not to block the main queue
  DispatchQueue.global(qos: .background).async {
    //Perform a hit test using the location of tap to see if it is on a plane
    let results = self.sceneView.hitTest(location, types: ARHitTestResult.ResultType.existingPlane)
    //If the hit test is successful then we can add our object to the plane 
    if let result = results.first {

PaulWall43

//Perform before we run the session
override func viewDidLoad() {
  super.viewDidLoad()
  //Load the scene from art.scnassets folder (important to put your assets in this folder)
  guard let scene = SCNScene(named: "art.scnassets/main.scn") else {return}
  //Set the scene property of our ARSCNView to our custom scene
  sceneView.scene = scene
}