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请看截图。 ViewController有repliesTableView, replyTextField and replyButton。 repliesTableView cell被称为ReplyCell。在ReplyCell中，有一个commentTableView列出该答复的所有评论，并添加textfField, a commentButton以添加新评论。如何从viewcontroller访问tableview单元格的属性？
添加新回复和新评论时出现问题。我想我需要使comments array在ReplyCell为空时点击Reply button。我怎样才能做到这一点？我不知道如何从根ViewController访问comments array。
确切的问题：单击commentButton时，每个单元格中的所有注释都加倍。点击replyButton后，评论去了错误的单元格。
Code:
import UIKit
import Firebase
class TopicForumVC: UIViewController, UITableViewDelegate, UITableViewDataSource, UITextFieldDelegate {
@IBOutlet weak var topicNameLabel: UILabel!
@IBOutlet weak var replyNumberLabel: UILabel!
@IBOutlet weak var repliesTableView: UITableView!
@IBOutlet weak var replyTextField: UITextField!
var topicName:String?
var firstKey:String?
var secondKey:String?
var replies = [String]()
var replyButtonTapped = false
override func viewDidLoad() {
super.viewDidLoad()
repliesTableView.delegate = self
repliesTableView.dataSource = self
replyTextField.delegate = self
}
override func viewDidAppear(_ animated: Bool) {
topicNameLabel.text = self.topicName
loadReplies()
}
func loadReplies() {
self.replies = []
DataService.ds.Categories_Base.child(self.firstKey!).child("Topics").observe(.value, with:{(snapshot) in
if let snapshots = snapshot.children.allObjects as? [FIRDataSnapshot] {
for snap in snapshots {
if let topicDict = snap.value as? Dictionary<String,AnyObject> {
if let topic = topicDict["text"] as? String {
if topic == self.topicName {
self.secondKey = snap.key
UserDefaults.standard.setValue(snap.key, forKey: Key_SecondKey)
if let replyDict = topicDict["replies"] as? Dictionary<String,AnyObject> {
for eachDict in replyDict {
if let textDict = eachDict.value as? Dictionary<String,AnyObject> {
if let reply = textDict["text"] as? String {
self.replies.append(reply)
self.replyNumberLabel.text = String(self.replies.count)
}
}
}
}
}
}
}
}
self.repliesTableView.reloadData()
}
})
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return replies.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier: "ReplyCell") as? ReplyCell {
let reply = replies[indexPath.row]
cell.configureReplyCell(reply: reply)
return cell
} else {
return UITableViewCell()
}
}
@IBAction func replyButtonTapped(_ sender: Any) {
replyButtonTapped = true
if let reply = replyTextField.text, reply != "" {
self.replies = []
DataService.ds.Categories_Base.child(self.firstKey!).child("Topics").child(self.secondKey!).child("replies").childByAutoId().child("text").setValue(reply)
self.repliesTableView.reloadData()
let i = replies.count
for n in 0..<i {
let indexPath = IndexPath(row: n, section: 1)
let cell = repliesTableView.cellForRow(at: indexPath) as! ReplyCell
cell.comments = []
cell.repliesToReplyTableView.reloadData()
}
self.replyTextField.text = ""
self.replyButtonTapped = false
}
}
}
import UIKit
import Firebase
class ReplyCell: UITableViewCell,UITableViewDataSource,UITableViewDelegate, UITextFieldDelegate {
@IBOutlet weak var replyTextView: UITextView!
@IBOutlet weak var repliesToReplyTableView: UITableView!
@IBOutlet weak var commentTextField: UITextField!
var reply:String?
var comments = [String]()
var replyKey:String?
override func awakeFromNib() {
super.awakeFromNib()
self.comments = []
repliesToReplyTableView.delegate = self
repliesToReplyTableView.dataSource = self
commentTextField.delegate = self
loadComments()
}
func configureReplyCell(reply:String) {
self.reply = reply
self.replyTextView.text = self.reply
}
func loadComments() {
self.comments = []
if let firstKey = UserDefaults.standard.value(forKey: Key_FirstKey) as? String, let secondKey = UserDefaults.standard.value(forKey: Key_SecondKey) as? String {
DataService.ds.Categories_Base.child(firstKey).child("Topics").child(secondKey).child("replies").observe(.value, with:{(snapshot) in
if let snapshots = snapshot.children.allObjects as? [FIRDataSnapshot] {
for snap in snapshots {
if let replyDict = snap.value as? Dictionary<String,AnyObject> {
if let reply = replyDict["text"] as? String {
if reply == self.reply {
self.replyKey = snap.key
DataService.ds.Categories_Base.child(firstKey).child("Topics").child(secondKey).child("replies").child(snap.key).child("comments").observe(.value, with: { (commentSnapshot) in
if let commentSnapshots = commentSnapshot.children.allObjects as? [FIRDataSnapshot] {
for commentSnap in commentSnapshots {
if let commentDict = commentSnap.value as? Dictionary<String,AnyObject> {
if let comment = commentDict["text"] as? String {
self.comments.append(comment)
}
}
}
}
self.repliesToReplyTableView.reloadData()
})
}
}
}
}
}
})
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return comments.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let commentCell = tableView.dequeueReusableCell(withIdentifier:"CommentCell")
commentCell?.textLabel?.text = comments[indexPath.row]
return commentCell!
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
@IBAction func commentBtnPressed(_ sender: Any) {
if let comment = commentTextField.text, comment != "" {
self.comments = []
if let firstKey = UserDefaults.standard.value(forKey: Key_FirstKey) as? String, let secondKey = UserDefaults.standard.value(forKey: Key_SecondKey) as? String {
DataService.ds.Categories_Base.child(firstKey).child("Topics").child(secondKey).child("replies").child(self.replyKey!).child("comments").childByAutoId().child("text").setValue(comment)
if let myViewController = parentViewController as? TopicForumVC {
// myViewController.repliesTableView.reloadData()
myViewController.replies = []
}
self.repliesToReplyTableView.reloadData()
self.commentTextField.text = ""
self.replyKey = ""
}
}
}
感谢您的详细解释。我添加了一个截图并修改了我的问题以使其更清晰。你能花一分钟时间来回顾并提出你的意见吗？感谢您的时间。 – developermike
@developermike你能让图像变大一点吗？ – Mackey18
@developermike他们在我的浏览器中看起来很模糊，很难弄清楚发生了什么。 – Mackey18