How to implement Realm in your ios app programmatically? - ios

Question

I have an ios app. I need to store two fields in my database realm(Title and image(or path to image). Now my data is storing in struct video but after reloading the app all changes missed. So how can I implement realm in my app?
My code looks :
struct Video {
var image: UIImage
var title : String }
class VideoCell: UITableViewCell {
var videoImageView=UIImageView()
var videoTitleLabel=UILabel()
}
required init?(coder:NSCoder){
fatalError("init(coder :) has not been implemented")
}
func set(video : Video) {
videoTitleLabel.text = video.title
videoImageView.image = video.image
}
class VideoListVC: UIViewController, UISearchResultsUpdating {
var tableView=UITableView()
var videos : [Video] = []
var videoImageView=UIImageView()
var videoTitleLabel=UILabel()
struct Cells {
static let videoCell = "VideoCell"
}
override func viewDidLoad(){
super.viewDidLoad()
title = ""
videos = fetchData()
configureTableView()
}
func configureTableView(){
view.addSubview(tableView)
setTableViewDelegates()
tableView.rowHeight = 290
tableView.register(VideoCell.self, forCellReuseIdentifier: Cells.videoCell)
tableView.pin(to:view)
} func setTableViewDelegates(){
tableView.delegate=self
tableView.dataSource=self
}
extension VideoListVC: UITableViewDelegate,UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return videos.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: Cells.videoCell) as! VideoCell
let video = videos[indexPath.row]
cell.set(video: video)
return cell
}
func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCell.EditingStyle {
return .delete
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
tableView.beginUpdates()
videos.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .fade)
tableView.endUpdates()
}
}

Answer 1

import realm-swift from github here https://github.com/realm/realm-swift
your data should looks somewhat similar to this
class Video: Object {
#Persisted(primaryKey: true) var _id: String
#Persisted var image: Data
#Persisted var title: String
}
I am assuming you want to persist your data after you fetch.
do {
let realm = try Realm()
try realm.write {
realm.add(video)
}
} catch {
assertionFailure("\(error)")
}
Not sure if there is a way to persist UIImage. I usually convert it to Data when I persist and then initialize the image using the Data when I retrieve.