I am trying to pass data in a UITextField that the user will input to go into a cell in a Collection View in another View Controller.
I want to create new 'posts' to be added to my feed every single time someone presses the 'upload' button, so the Collection View cell needs to somehow upload the given information and then clear the cell.
I don't know how to approach passing the data to the Collection View.
Here is my View Controller and my Cell code.
import UIKit
import Firebase
class UploadViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
@IBOutlet weak var previewImage: UIImageView!
@IBOutlet weak var postBtn: UIButton!
@IBOutlet weak var selectBtn: UIButton!
@IBOutlet weak var thisTextField: UITextField!
@IBOutlet weak var thatTextField: UITextField!
var picker = UIImagePickerController()
@IBAction func thisPhotoUpload(_ sender: Any) {
if thisTextField.text != "" || thatTextField.text != ""
{
performSegue(withIdentifier: "segue", sender: self)
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
var postCell = segue.destination as! PostCell
postCell.thisString = thisTextField.text!
postCell.thatString = thatTextField.text!
}
override func viewDidLoad() {
super.viewDidLoad()
picker.delegate = self
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let image = info[UIImagePickerControllerEditedImage] as? UIImage {
self.previewImage.image = image
selectBtn.isHidden = true
postBtn.isHidden = false
}
self.dismiss(animated: true, completion: nil)
}
@IBAction func selectPressed(_ sender: Any) {
picker.allowsEditing = true
picker.sourceType = .photoLibrary
self.present(picker, animated: true, completion: nil)
}
@IBAction func postPressed(_ sender: Any) {
AppDelegate.instance().showActivityIndicator()
let uid = FIRAuth.auth()!.currentUser!.uid
let ref = FIRDatabase.database().reference()
let storage = FIRStorage.storage().reference(forURL: "gs://instagram-f3f20.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.put(data!, metadata: nil) { (metadata, error) in
if error != nil {
print(error!.localizedDescription)
AppDelegate.instance().dismissActivityIndicatos()
return
}
imageRef.downloadURL(completion: { (url, error) in
if let url = url {
let feed = ["userID" : uid,
"pathToImage" : url.absoluteString,
"likes" : 0,
"author" : FIRAuth.auth()!.currentUser!.displayName!,
"postID" : key] as [String : Any]
let postFeed = ["\(key)" : feed]
ref.child("posts").updateChildValues(postFeed)
AppDelegate.instance().dismissActivityIndicatos()
self.dismiss(animated: true, completion: nil)
}
})
}
uploadTask.resume()
}
}
CollectionViewCell subclass
import UIKit
import Firebase
class PostCell: UICollectionViewCell {
@IBOutlet weak var postImage: UIImageView!
@IBOutlet weak var authorLabel: UILabel!
@IBOutlet weak var likeLabel: UILabel!
@IBOutlet weak var likeBtn: UIButton!
@IBOutlet weak var unlikeBtn: UIButton!
@IBOutlet weak var thisLabel: UILabel!
@IBOutlet weak var thisButton: UIButton!
@IBOutlet weak var thatLabel: UILabel!
@IBOutlet weak var thatButton: UIButton!
var postID: String!
var thisString = String()
var thatString = String()
override func awakeFromNib() {
super.awakeFromNib()
thisLabel.text = thisString
thisButton.setTitle(thisString, for: UIControlState.normal)
thatLabel.text = thisString
thatButton.setTitle(thisString, for: UIControlState.normal)
}
@IBAction func likePressed(_ sender: Any) {
self.likeBtn.isEnabled = false
let ref = FIRDatabase.database().reference()
let keyToPost = ref.child("posts").childByAutoId().key
ref.child("posts").child(self.postID).observeSingleEvent(of: .value, with: { (snapshot) in
if let post = snapshot.value as? [String : AnyObject] {
let updateLikes: [String : Any] = ["peopleWhoLike/\(keyToPost)" : FIRAuth.auth()!.currentUser!.uid]
ref.child("posts").child(self.postID).updateChildValues(updateLikes, withCompletionBlock: { (error, reff) in
if error == nil {
ref.child("posts").child(self.postID).observeSingleEvent(of: .value, with: { (snap) in
if let properties = snap.value as? [String : AnyObject] {
if let likes = properties["peopleWhoLike"] as? [String : AnyObject] {
let count = likes.count
self.likeLabel.text = "\(count) Likes"
let update = ["likes" : count]
ref.child("posts").child(self.postID).updateChildValues(update)
self.likeBtn.isHidden = true
self.unlikeBtn.isHidden = false
self.likeBtn.isEnabled = true
}
}
})
}
})
}
})
ref.removeAllObservers()
}
@IBAction func unlikePressed(_ sender: Any) {
self.unlikeBtn.isEnabled = false
let ref = FIRDatabase.database().reference()
ref.child("posts").child(self.postID).observeSingleEvent(of: .value, with: { (snapshot) in
if let properties = snapshot.value as? [String : AnyObject] {
if let peopleWhoLike = properties["peopleWhoLike"] as? [String : AnyObject] {
for (id,person) in peopleWhoLike {
if person as? String == FIRAuth.auth()!.currentUser!.uid {
ref.child("posts").child(self.postID).child("peopleWhoLike").child(id).removeValue(completionBlock: { (error, reff) in
if error == nil {
ref.child("posts").child(self.postID).observeSingleEvent(of: .value, with: { (snap) in
if let prop = snap.value as? [String : AnyObject] {
if let likes = prop["peopleWhoLike"] as? [String : AnyObject] {
let count = likes.count
self.likeLabel.text = "\(count) Likes"
ref.child("posts").child(self.postID).updateChildValues(["likes" : count])
}else {
self.likeLabel.text = "0 Likes"
ref.child("posts").child(self.postID).updateChildValues(["likes" : 0])
}
}
})
}
})
self.likeBtn.isHidden = false
self.unlikeBtn.isHidden = true
self.unlikeBtn.isEnabled = true
break
}
}
}
}
})
ref.removeAllObservers()
}
}
Right now I'm getting the error in my View Controller on the 'var postCell = segue.destination as! PostCell' line. The error says 'Bad Execution'
Any and all help would be great.
