Why isn't my Image displaying in the UIImageView? - ios

Question

I want to get an if statement which, if the selected button corresponded to the first image view, set it to the first image, else set it to the second image view... But, once I select the image from the image picker, it just ignores it and moves on like if nothing happened.
Here is my code:
(it down under the image picker controller func...)
class UploadSubPostCell: UICollectionViewCell {
#IBOutlet weak var previewStep: UIImageView!
}
class UploadViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
#IBOutlet weak var previewImage: UIImageView!
#IBOutlet weak var postBtn: UIButton!
#IBOutlet weak var selectBtn: UIButton!
#IBOutlet weak var postscollectionview: UICollectionView!
#IBOutlet weak var selectStepsBtn: UIButton!
var picker = UIImagePickerController()
var isThumbnailImage = true
var subpostsArray = [UIImage]()
var subposts = [SubPost]()
var posts = [Post]()
override func viewDidLoad() {
super.viewDidLoad()
setupNavigationBarItems()
picker.delegate = self
}
func setupNavigationBarItems() {
navigationItem.title = "Upload"
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let image = info[UIImagePickerControllerEditedImage] as? UIImage {
let path = IndexPath(item: 0, section: 0)
let cell = self.postscollectionview.cellForItem(at: path) as? UploadSubPostCell
if isThumbnailImage{
previewImage.image = image
} else {
cell?.previewStep.image = image
}
selectBtn.isHidden = false
selectStepsBtn.isHidden = false
postBtn.isHidden = false
if isThumbnailImage == false {
subpostsArray.append(image)
subposts.count + 1
print("Appended image to array:", subpostsArray)
}
}
picker.dismiss(animated: true, completion: nil)
}
#IBAction func selectStepPressed(_ sender: Any) {
picker.allowsEditing = true
picker.sourceType = .photoLibrary
isThumbnailImage = false
self.present(picker, animated: true, completion: nil)
}
#IBAction func selectPressed(_ sender: Any) {
picker.allowsEditing = true
picker.sourceType = .photoLibrary
isThumbnailImage = true
self.present(picker, animated: true, completion: nil)
}
#IBAction func addNewPressed(_ sender: Any) {
}
#IBAction func postPressed(_ sender: Any) {
AppDelegate.instance().showActivityIndicator()
let uid = Auth.auth().currentUser!.uid
let ref = Database.database().reference()
let storage = Storage.storage().reference(forURL: "gs://mobile-d9fcd.appspot.com")
let key = ref.child("posts").childByAutoId().key
let imageRef = storage.child("posts").child(uid).child("\(key).jpg")
let data = UIImageJPEGRepresentation(self.previewImage.image!, 0.6)
let uploadTask = imageRef.putData(data!, metadata: nil) { (metadata, error) in
if error != nil {
print(error!.localizedDescription)
AppDelegate.instance().dismissActivityIndicator()
return
}
imageRef.downloadURL(completion: { (url, error) in
if let url = url {
let feed = ["userID" : uid,
"pathToImage" : url.absoluteString,
"likes" : 0,
"author" : Auth.auth().currentUser!.displayName!,
"postID" : key] as [String : Any]
let postFeed = ["\(key)" : feed]
ref.child("posts").updateChildValues(postFeed)
AppDelegate.instance().dismissActivityIndicator()
self.picker.dismiss(animated: true, completion: nil)
}
})
}
uploadTask.resume()
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.posts.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "postCell", for: indexPath) as! PostCell
cell.postImage.downloadImage(from: self.posts[indexPath.row].pathToImage)
cell.authorLabel.text = self.posts[indexPath.row].author
cell.likeLabel.text = "\(self.posts[indexPath.row].likes!) Likes"
cell.postID = self.posts[indexPath.row].postID
}
}
}

Answer 1

In didFinishPickingMediaWithInfo, you should save the image with the dataSource, if you know what cell the image goes into, use tableView.reloadRows(at indexPaths:) to reload the cell. Add the image to cell.previewStep.image in cellForRowAt()

Answer 2

if you are using swift version 4.2 and above, you should be replacing:
if let image = info[UIImagePickerControllerEditedImage] as? UIImage {
by:
if let image = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {