Swift Firebase Image UIActivityViewController - ios

Question

Need help retrieving and setting an image from firebase. I am able to get the right URL for the image, but unsure on how to convert it to an actual picture I can share using the UIActivityViewController. "let titlePost = self.feeds[sender.tag].downloadURL" is what I am using to retrieve the specific image URL from a post from a tableview feed within my app. I have tried giving it a shot but need some help. Thank you
let shareAction = UIAlertAction(title: "Share", style: UIAlertActionStyle.default, handler: {(alert: UIAlertAction!) in
var objectsToShare: [AnyObject]?
let image: UIImage?
let titlePost = self.feeds[sender.tag].downloadURL
if let postURL = URL(string: titlePost) {
let postRequest = URLRequest(url: postURL)
image.setImageWith(postURL, placeholderImage: nil, options: SDWebImageOptions.progressiveDownload, completed: { (imageRequest, imageResponse, error) -> Void in
// failure downloading image
print("Error downloading Firebase post image")
print(error)
})
}
objectsToShare = [titlePost as AnyObject]
let activityViewController = UIActivityViewController(activityItems: objectsToShare!, applicationActivities: nil)
// present the view controller
self.present(activityViewController, animated: true, completion: nil)
})
Where I am pulling the image from
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier: "feedCell", for: indexPath) as? CustomerPostsViewCell {
let post = feeds[indexPath.row]
let caption = post.caption
let downloadURL = post.downloadURL
let name = post.name
let address = post.address
let state = post.state
let date = post.date
let distance = post.distance
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy"
let dateString = dateFormatter.string(from: date)
// Business Name
cell.businessNameLabel.text = name
cell.businessAddressLabel.text = address
cell.businessStateLabel.text = state
cell.businessPostDistanceLabel.text = distance
// caption
cell.captionView.text = caption
// post image
cell.businessPostImage.image = nil
if let postURL = URL(string: downloadURL) {
let postRequest = URLRequest(url: postURL)
cell.businessPostImage.setImageWith(postURL, placeholderImage: nil, options: SDWebImageOptions.progressiveDownload, completed: { (imageRequest, imageResponse, error) -> Void in
// failure downloading image
print("Error downloading Firebase post image")
print(error)
})
}
// set date of post
cell.postTimeLabel.text = dateString
cell.optionsButton.tag = indexPath.row
cell.optionsButton.addTarget(self, action: #selector(optionsButton), for: .touchUpInside)
return cell
}
return UITableViewCell()
}
// MARK: Queries
func getAllPosts(refreshing: Bool, refreshControl: UIRefreshControl?) {
let ref = Database.database().reference().child("posts")
MBProgressHUD.showAdded(to: self.view, animated: true)
ref.queryOrdered(byChild: "businessName").observe(.childAdded, with: { snapshot in
//observeSingleEvent(of: .value, with: { snapshot in
if let dict = snapshot.value as? NSDictionary {
self.feeds = []
for item in dict {
let json = JSON(item.value)
let uid = json["uid"].stringValue
var name: String = json["businessName"].stringValue
let address: String = json["businessStreet"].stringValue
let state: String = json["businessCity"].stringValue
let caption: String = json["caption"].stringValue
let downloadURL: String = json["download_url"].stringValue
let timestamp = json["timestamp"].doubleValue
let date = Date(timeIntervalSince1970: timestamp/1000)
let lat = json["businessLatitude"].doubleValue
let long = json["businessLongitude"].doubleValue
let businessLocation = CLLocation(latitude: lat, longitude: long)
let latitude = self.locationManager.location?.coordinate.latitude
let longitude = self.locationManager.location?.coordinate.longitude
let userLocation = CLLocation(latitude: latitude!, longitude: longitude!)
let distanceInMeters: Double = userLocation.distance(from: businessLocation)
let distanceInMiles: Double = distanceInMeters * 0.00062137
let distanceLabelText = String(format: "%.2f miles away", distanceInMiles)
self.uid = json["uid"].stringValue
let usersReference = Database.database().reference(withPath: "users").queryOrderedByKey().queryEqual(toValue: uid)
usersReference.observeSingleEvent(of: .value, with: { snapshot in
if let dict = snapshot.value as? NSDictionary {
let userInfo = dict.allValues[0]
let userJSON = JSON(userInfo)
name = userJSON["name"].stringValue
}
let post = Post(uid: uid, caption: caption, downloadURL: downloadURL, name: name, date: date, address: address, state: state, distance: distanceLabelText)
self.feeds.append(post)
// sort posts by date/distance
//self.feeds.sort {$0.date.compare($1.date) == .orderedAscending}
self.feeds.sort {$0.distance.compare($1.distance) == .orderedAscending}
self.feedTableView.reloadData()
})
}
}
if refreshing {
refreshControl?.endRefreshing()
}
MBProgressHUD.hide(for: self.view, animated: true)
})
}