How to send multiple images to Firebase and retrieve them in the UIImageView in Swift - swift

Question

I have an app that lets users choose multiple images. The problem is that it doesn't upload and save the image to the user in Firebase and retrieve the image.
This is my code:
import UIKit
import Photos
import Firebase
import BSImagePicker
class Downloadimages: UIViewController {
#IBOutlet weak var imgView: UIImageView!
var ref: DatabaseReference?
var SelectedAssets = [PHAsset]()
var PhotoArray = [UIImage]()
override func viewDidLoad() {
super.viewDidLoad()
ref = Database.database().reference()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func addImagesClicked(_ sender: Any) {
// create an instance
let vc = BSImagePickerViewController()
//display picture gallery
self.bs_presentImagePickerController(vc, animated: true,
select: { (asset: PHAsset) -> Void in
}, deselect: { (asset: PHAsset) -> Void in
// User deselected an assets.
}, cancel: { (assets: [PHAsset]) -> Void in
// User cancelled. And this where the assets currently selected.
}, finish: { (assets: [PHAsset]) -> Void in
// User finished with these assets
for i in 0..<assets.count
{
self.SelectedAssets.append(assets[i])
}
self.convertAssetToImages()
}, completion: nil)
let image = UIImagePickerController()
image.delegate = self as? UIImagePickerControllerDelegate & UINavigationControllerDelegate
image.sourceType = UIImagePickerControllerSourceType.photoLibrary
image.allowsEditing = false
self.present(image, animated: true)
{
//after its completed
}
}
#objc(imagePickerController:didFinishPickingMediaWithInfo:) func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
{
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage
{
imgView.image = image
}
else
{
//error
}
self.dismiss(animated: true, completion: nil)
let storageRef = Storage.storage().reference().child("myImage.png")
if let uploadData = UIImagePNGRepresentation(self.imgView.image!){
storageRef.putData(uploadData, metadata: nil, completion:
{
(metadata, error) in
if error != nil {
print("error")
return
}
print(metadata!)
//how do I put the download URL in the metadata into my database
}
)
}
}
func convertAssetToImages() -> Void {
if SelectedAssets.count != 0{
for i in 0..<SelectedAssets.count{
let manager = PHImageManager.default()
let option = PHImageRequestOptions()
var thumbnail = UIImage()
option.isSynchronous = true
manager.requestImage(for: SelectedAssets[i], targetSize: CGSize(width: 200, height: 200), contentMode: .aspectFill, options: option, resultHandler: {(result, info)->Void in
thumbnail = result!
})
let data = UIImageJPEGRepresentation(thumbnail, 0.7)
let newImage = UIImage(data: data!)
self.PhotoArray.append(newImage! as UIImage)
}
self.imgView.animationImages = self.PhotoArray
self.imgView.animationDuration = 3.0
self.imgView.startAnimating()
}
print("complete photo array \(self.PhotoArray)")
}
}
and this is my post code
import Foundation
class Post {
var id:String
var author:UserProfile
var text:String
var createdAt:Date
init(id:String, author:UserProfile,text:String,timestamp:Double) {
self.id = id
self.author = author
self.text = text
self.createdAt = Date(timeIntervalSince1970: timestamp / 1000)
}
static func parse(_ key:String, _ data:[String:Any]) -> Post? {
if let author = data["author"] as? [String:Any],
let uid = author["uid"] as? String,
let username = author["username"] as? String,
let photoURL = author["photoURL"] as? String,
let url = URL(string:photoURL),
let text = data["text"] as? String,
let timestamp = data["timestamp"] as? Double {
let userProfile = UserProfile(uid: uid, username: username, photoURL: url)
return Post(id: key, author: userProfile, text: text, timestamp:timestamp)
}
return nil
}
}
this is my userProfile
import Foundation
class UserProfile {
var uid:String
var username:String
var photoURL:URL
init(uid:String, username:String,photoURL:URL) {
self.uid = uid
self.username = username
self.photoURL = photoURL
}
}
and this is
import Foundation
import Firebase
class UserService {
static var currentUserProfile:UserProfile?
static func observeUserProfile(_ uid:String, completion: #escaping ((_ userProfile:UserProfile?)->())) {
let userRef = Database.database().reference().child("users/profile/\(uid)")
userRef.observe(.value, with: { snapshot in
var userProfile:UserProfile?
if let dict = snapshot.value as? [String:Any],
let username = dict["username"] as? String,
let photoURL = dict["photoURL"] as? String,
let url = URL(string:photoURL) {
userProfile = UserProfile(uid: snapshot.key, username: username, photoURL: url)
}
completion(userProfile)
})
}
}