How can I upload images from gallery to TableViewCell - ios

Question

PostViewController
I'm working on a social app. In which I want to upload photos from gallery to my TableViewCell by UploadButton. By programmatically I created some posts, as shown in MainScreenViewController, like facebook or instagram. But now I want to add a photo by picking up from gallery and upload to the VC.
This is my PostViewController in which I'm getting a photo from library and now I want to post it on MainScreenViewController's ViewControllersTableView.
Kindly help at this point
import UIKit
import Firebase
import FirebaseDatabase
import FirebaseStorage
class PostViewController: UIViewController {
var ref = DatabaseReference.init()
#IBOutlet weak var txtText: UITextField!
#IBOutlet weak var myImageView: UIImageView!
#IBOutlet weak var btnUpload: UIButton!
let imagePicker = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
btnUpload.designButton(borderWidth: 0, borderColor: UIColor.clear)
self.ref = Database.database().reference()
let tapGesture = UITapGestureRecognizer()
tapGesture.addTarget(self, action: #selector(PostViewController.openGallery(tapGesture:)))
myImageView.isUserInteractionEnabled = true
myImageView.addGestureRecognizer(tapGesture)
}
func saveFIRData() {
self.uploadImage(self.myImageView.image!) { url in
self.saveImage(name: self.txtText.text!, profileURL: url!) { success in
if success != nil {
print("Good")
}
}
}
}
#objc func openGallery(tapGesture: UITapGestureRecognizer) {
self.setUpImagePicker()
}
#IBAction func btnSaveClick(_ sender: UIButton) {
self.saveFIRData()
}
}
extension PostViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
func setUpImagePicker() {
if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum) {
imagePicker.sourceType = .savedPhotosAlbum
imagePicker.delegate = self
imagePicker.isEditing = true
self.present(imagePicker, animated: true, completion: nil)
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
myImageView.image = image
self.dismiss(animated: true, completion: nil)
}
}
extension PostViewController {
func uploadImage(_ image:UIImage, completion: #escaping ((_ url: URL?) -> ())) {
let storageRef = Storage.storage().reference().child("myImage.png")
let imgData = myImageView.image?.pngData()
let metaData = StorageMetadata()
metaData.contentType = "image/png"
storageRef.putData(imgData!, metadata: metaData) { (metdata, error) in
if error == nil {
print("Success")
storageRef.downloadURL(completion: { (url, error) in
completion(url!)
})
} else {
print("error in save image")
completion(nil)
}
}
}
func saveImage(name: String, profileURL: URL, completion: #escaping ((_ url: URL?) -> ())) {
let dict = ["name": "Omer", "text": txtText.text!, "profileURL": profileURL.absoluteString] as [String: Any]
self.ref.child("chat").childByAutoId().setValue(dict)
}
}
MainScreenViewController
import UIKit
import Firebase
import FirebaseAuth
class MainScreenViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var cardTableView: UITableView!
let pictures: [UIImage] = [UIImage(named: "1")!, UIImage(named: "2")!, UIImage(named: "3")!]
let images: [UIImage] = [UIImage(named: "aa")!, UIImage(named: "ab")!, UIImage(named: "ac")!]
let titles: [String] = ["Che Guevara", "BatMan", "Information Technology"]
let descriptions: [String] = ["Ernesto Che Guevara was an Argentine Marxist revolutionary, guerrilla leader.", "Batman ventures into Gotham City's underworld.", "Information technology is defined as a broad term that includes the development."]
override func viewDidLoad() {
super.viewDidLoad()
cardTableView.delegate = self
cardTableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return pictures.count
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 400
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cardCell", for: indexPath) as! CardCell
cell.configure(picture: pictures[indexPath.row], img: images[indexPath.row], title: titles[indexPath.row], description: descriptions[indexPath.row])
return cell
}
}
CardCell
import UIKit
import Firebase
import FirebaseAuth
class CardCell: UITableViewCell {
#IBOutlet weak var cardView: UIView!
#IBOutlet weak var pictureView: UIImageView!
#IBOutlet weak var profileImage: UIImageView!
#IBOutlet weak var titleLabel: UILabel!
#IBOutlet weak var descriptionLabel: UILabel!
#IBOutlet weak var btnLike: UIButton!
// set up the cell
func configure(picture: UIImage, img: UIImage, title: String, description: String) {
pictureView.image = picture
profileImage.image = img
titleLabel.text = title
descriptionLabel.text = description
cardView.layer.shadowColor = UIColor.gray.cgColor
cardView.layer.shadowOffset = CGSize(width: 1.0, height: 1.0)
cardView.layer.shadowOpacity = 1.0
cardView.layer.masksToBounds = false
cardView.layer.cornerRadius = 2.0
}
#IBAction func btnLike_Click(_ sender: UIButton) {
if btnLike.tag == 0 {
btnLike.setImage(UIImage(named: "h1"), for: .normal)
btnLike.tag = 1
} else {
btnLike.setImage(UIImage(named: "h4"), for: .normal)
btnLike.tag = 0
}
}
}

Answer 1

I think you can use closure to pass data back to MainVC which I found it lot easier
Create a closure in PostViewController :
var uploadedImage : ((UIImage)->Void)?
Assign the uploadedImage property before the picker is dismissed
uploadedImage(myUplodedImage)?
Use the property of the closure when you initiate it on MainViewController
let vc = PostViewController(nibName : "something", bundle : nil)
vc.uploadedImage = {
// Add some action here when the PostViewController dismiss
}
navigationController.pushViewController(vc, animated : true)
Additional references :
Passing Data Between View Controllers