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我有一個Instagram像一個一個一個地在每個單元格中顯示一個圖片的Feed。你可以按下它們並定向到commentTBV。這裏是我在帖子下面留下的所有評論，並且他們在此視圖中正確計數。顯示Feed中的評論數
var commentsArray = [FotoComment]()
is the array holding the comments
kommentarArray是我想用assignArray func填充的數組，因此我可以用它來顯示計數的數量。
var kommentarArray = [FotoComment]()
[FotoComment]是我STRUC我用我的意見
我想的是，已經在飼料中commentArray.count將顯示評論數正確。
func assignArray() {
let otherVC = CommentTableViewController()
kommentarArray = otherVC.commentsArray
打印（kommentarArray.count） }
這樣，我從我的飼料在CommentTBVC意見數組訪問。
我的手機是：
cell.kommentarZähler.text = "Kommentare: \(kommentarArray.count)"
但它始終顯示爲0，即使它已經有5篇評論，並在CommentTBV正確顯示。
M代表MemesTableViewConbtroller（進料）
import UIKit
進口火力地堡 進口FirebaseAuth 進口FirebaseDatabase
類MemesTableViewController完整代碼：{的UITableViewController
var kommentarArray = [FotoComment]()
var dataBaseRef : FIRDatabaseReference!
var storageRef : FIRStorageReference!
var posts = [PostMitBild]()
var segmentedControl : HMSegmentedControl!
override func viewDidLoad() {
super.viewDidLoad()
assignArray()
segmentedControl = HMSegmentedControl(sectionTitles: ["Top Heute", "Beliebteste", "Neue"])
segmentedControl.frame = CGRect(x: 10, y: 10, width: 300, height: 60)
segmentedControl.backgroundColor = UIColor.red
segmentedControl.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.white]
segmentedControl.borderColor = UIColor.brown
segmentedControl.tintColor = UIColor.black
segmentedControl.selectionIndicatorColor = UIColor.gray
segmentedControl.addTarget(self, action: #selector(getter: MemesTableViewController.segmentedControl), for: UIControlEvents.valueChanged)
tableView.tableHeaderView = segmentedControl
segmentedAction()
}
func segmentedAction() {
if segmentedControl.selectedSegmentIndex == 0 {
let postRef = FIRDatabase.database().reference().child("MemesBilder")
postRef.observe(.value, with: { (snapshot) in
var newPost = [PostMitBild]()
for post in snapshot.children {
let Post = PostMitBild(snapshot: post as! FIRDataSnapshot)
newPost.insert(Post, at: 0)
}
self.posts = newPost
DispatchQueue.main.async {
self.tableView.reloadData()
}
}, withCancel: { (error) in
print(error.localizedDescription)
})
}
}
//------------------------------------------
override func viewWillAppear(_ animated: Bool) {
if FIRAuth.auth()?.currentUser == nil {
let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "Login")
self.present(vc, animated: true, completion: nil)
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "postCell", for: indexPath) as! PostTableViewCell
if let seconds = posts[indexPath.row].postDate {
let timestamp = NSDate(timeIntervalSince1970: seconds)
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/yyyy HH:mm"
cell.uploadDatum.text = dateFormatter.string(from: timestamp as Date)
}
cell.kommentarZähler.text = "Kommentare: \(kommentarArray.count)"
cell.usernameTextField.text = posts[indexPath.row].username
cell.postContent.text = posts[indexPath.row].content
storageRef = FIRStorage.storage().reference(forURL: posts[indexPath.row].userImageUrlString)
storageRef.data(withMaxSize: 1 * 1024 * 1024, completion: { (data, error) in
if error == nil {
DispatchQueue.main.async {
if let data = data {
cell.UserImageView.image = UIImage (data: data)
}
}
}else {
print(error?.localizedDescription)
}
})
let storageRef2 = FIRStorage.storage().reference(forURL: posts[indexPath.row].PostImageUrlString)
storageRef2.data(withMaxSize: 1 * 1024 * 1024, completion: { (data, error) in
if error == nil {
DispatchQueue.main.async {
if let data = data {
cell.postImageView.image = UIImage (data: data)
}
}
}else {
print(error?.localizedDescription)
}
})
return cell
}
//done!!!! ------------------------------------------
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
tableView.deleteRows(at: [indexPath], with: .fade)
let ref = posts[indexPath.row].ref
ref!.removeValue()
posts.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .fade)
}
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
var numberOfRows = 0
switch segmentedControl.selectedSegmentIndex {
case 0 : numberOfRows = posts.count
case 1: numberOfRows = posts.count
default: break
}
return numberOfRows
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 420.00
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segmentedControl.selectedSegmentIndex == 0 {
if segue.identifier == "addComment" {
let vc = segue.destination as! CommentTableViewController
let indexPath = tableView.indexPathForSelectedRow!
vc.selectedPosts = posts[indexPath.row]
}
}
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if segmentedControl.selectedSegmentIndex == 0 {
performSegue(withIdentifier: "addComment", sender: self)
}
if segmentedControl.selectedSegmentIndex == 1 {
performSegue(withIdentifier: "addComment", sender: self)
}
if segmentedControl.selectedSegmentIndex == 2 {
performSegue(withIdentifier: "addComment", sender: self)
}
}
func assignArray() {
let otherVC = CommentTableViewController()
kommentarArray = otherVC.commentsArray
print(kommentarArray.count)
}
}
的CommentTableViewController（在這裏我想的意見從數組VAR commentsArray = FotoComment這是對這個TableView中已經工作數）
import UIKit
進口火力地堡 進口FirebaseAuth 進口FirebaseDatabase 進口FirebaseStorage代碼
類CommentTableViewController：{的UITableViewController
@IBOutlet weak var komentarZähler: UILabel!
@IBOutlet weak var UserImageView: UIImageView!
@IBOutlet weak var usernameTextField: UILabel!
@IBOutlet weak var postImageView: UIImageView!
@IBOutlet weak var postContent: UITextView!
var dataBaseRef : FIRDatabaseReference!
var storageRef : FIRStorageReference!
var commentsArray = [FotoComment]()
var selectedPosts:PostMitBild!
override func viewDidLoad() {
super.viewDidLoad()
configurePost()
let commentRef = selectedPosts.ref!.child("Kommentare")
commentRef.observe(.value, with: { (snapshot) in
var newComments = [FotoComment]()
for item in snapshot.children {
let neuerKommentar = FotoComment(snapshot: item as! FIRDataSnapshot)
newComments.insert(neuerKommentar, at: 0)
}
self.commentsArray = newComments
self.tableView.reloadData()
}, withCancel: { (error) in
print(error.localizedDescription)
})
}
@IBAction func addComment(_ sender: UIBarButtonItem) {
let alertView = UIAlertController(title: "Kommentar", message: "Füge einen Kommentar hinzu", preferredStyle: UIAlertControllerStyle.alert)
alertView.addTextField { (textfield) in
textfield.placeholder = "Einen neuen Kommentar hinzufügen"
}
let sendCommentAction = UIAlertAction(title: "Kommentieren", style: .default) { (action) in
let textfield = alertView.textFields!.first!
let comment = FotoComment(content: textfield.text! , postId: self.selectedPosts.postId , username: (FIRAuth.auth()!.currentUser!.displayName!) , userImageUrlString: String(describing: FIRAuth.auth()!.currentUser!.photoURL!), postDate: (NSDate().timeIntervalSince1970))
let commentRef = self.selectedPosts.ref!.child("Kommentare").childByAutoId()
commentRef.setValue(comment.toAnyObject())
}
let cancelAction = UIAlertAction(title: "Abbrechen", style: .cancel, handler: nil)
alertView.addAction(sendCommentAction)
alertView.addAction(cancelAction)
self.present(alertView, animated: true, completion: nil)
}
// 2----------------------------------------------
func configurePost() {
usernameTextField.text = selectedPosts.username
postContent.text = selectedPosts.content
storageRef = FIRStorage.storage().reference(forURL: selectedPosts.userImageUrlString)
storageRef.data(withMaxSize: 1 * 1024 * 1024, completion: { (data, error) in
if error == nil {
DispatchQueue.main.async {
if let data = data {
self.UserImageView.image = UIImage (data: data)
}
}
}else {
print(error?.localizedDescription)
}
})
let storageRef2 = FIRStorage.storage().reference(forURL: selectedPosts.PostImageUrlString)
storageRef2.data(withMaxSize: 1 * 1024 * 1024, completion: { (data, error) in
if error == nil {
DispatchQueue.main.async {
if let data = data {
self.postImageView.image = UIImage (data: data)
}
}
}else {
print(error?.localizedDescription)
}
})
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
komentarZähler.text = "Kommentare: \(commentsArray.count)"
return commentsArray.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "commentCell", for: indexPath) as! CommentTableViewCell
if let seconds = commentsArray[indexPath.row].postDate {
let timestamp = NSDate(timeIntervalSince1970: seconds)
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/yyyy HH:mm:ss"
cell.uploadDatum.text = dateFormatter.string(from: timestamp as Date)
}
cell.usernameTextField.text = commentsArray[indexPath.row].username
cell.postContent.text = commentsArray[indexPath.row].content
storageRef = FIRStorage.storage().reference(forURL: commentsArray[indexPath.row].userImageUrlString!)
storageRef.data(withMaxSize: 1 * 1024 * 1024, completion: { (data, error) in
if error == nil {
DispatchQueue.main.async {
if let data = data {
cell.UserImageView.image = UIImage (data: data)
}
self.tableView.reloadData()
}
}else {
print(error?.localizedDescription)
}
})
回報細胞 }
}
哪一個是你的主陣列？你有兩個數組，即'kommentarArray'和'commentsArray'，你的函數似乎正在複製一個到下一個，因此你最終有兩個數組持有相同的數據。我的猜測是'commentsArray'是你的主要使用它的計數作爲你的單元格的文本，並擺脫'assignArray'函數 – eshirima
我的主數組保存所有的評論是：var commentsArray = [FotoComment]（）。 KommentarArray在feedTBV上，並且有一個地方我嘗試獲取計數。我嘗試在kommentarArray（新的）和commentsArray（持有正確數量的註釋的數據）中擁有相同的數據，但它只顯示0。 –
這是你用來打印你的內容？ – eshirima