[英]Swift TableView segue to new ViewController with wrong index path (penultimate selection)
我有一個奇怪的問題。 我有兩個 TableView,一個用於顯示項目,一個用於顯示所有團隊成員。 對於這兩個 TableView,我都有同樣的錯誤。
當用戶單擊項目/團隊成員時,我想顯示它的詳細信息。
奇怪的是,當我 select 第一次運行該應用程序時,我是項目/團隊成員,沒有任何反應。 當我然后 select 另一個時,它顯示了我之前選擇的一個的詳細信息。 我希望有人可以幫助我。
同樣奇怪的是,條目“Sarra Fezzani”已從 Firebase 數據庫中刪除,應用程序是干凈的構建,但它仍然多次顯示......
由於這兩個代碼非常相似,所以我只會發布 ProjetTableViewController 的代碼,而不會發布其他文件。
//
// TeamViewController.swift
// ProLabArtv2
//
import UIKit
class TeamViewController: UIViewController {
// MARK: - Properties
@IBOutlet weak var memberTableView: UITableView!
@IBOutlet weak var addTeamMember: UIButton!
var members = [TeamMember]()
var textToBeSent: String = ""
override func viewDidLoad() {
super.viewDidLoad()
setUpElements()
UserService.members(for: User.current) { (members) in
self.members = members
self.memberTableView.reloadData()
}
}
// MARK: - Element Style
func setUpElements() {
// Mark: Style the elements
Utilities.addShadowtoButton(addTeamMember)
}
func configureTableView() {
// remove separators for empty cells
memberTableView.tableFooterView = UIView()
// remove separators from cells
memberTableView.separatorStyle = .none
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "toMemberDetails" {
let destVC = segue.destination as! TeamMemberDetailsViewController
destVC.member = sender as? TeamMember
}
}
}
// MARK: - UITableViewDataSource
extension TeamViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
let member = members[indexPath.row]
let cell = memberTableView.cellForRow(at: indexPath)
print(members)
performSegue(withIdentifier: "toMemberDetails", sender: member)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return members.count
}
// func numberOfSections(in tableView: UITableView) -> Int {
// return members.count
// }
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let member = members[indexPath.row]
let cell = memberTableView.dequeueReusableCell(withIdentifier: "TeamMemberCell") as! TeamMemberCell
cell.jobLabel.text = members[indexPath.row].memberJob
cell.nameLabel.text = members[indexPath.row].memberName
return cell
}
}
// MARK: - UITableViewDelegate
extension TeamViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 80
}
}
import UIKit
class TeamMemberCell: UITableViewCell {
// MARK: - Properties
@IBOutlet weak var nameLabel: UILabel!
@IBOutlet weak var jobLabel: UILabel!
static let height: CGFloat = 78
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
import Foundation
import UIKit
import FirebaseDatabase.FIRDataSnapshot
class TeamMember {
// Next let's add properties to store all the additional information we need. Add the following to your post class.
var key: String?
let memberName: String
let memberJob: String
let memberLanguage: String
let memberPrice: String
let memberSpecification: String
// You'll get some compiler errors for not having any initializers or default values for certain properties. Let's go ahead and fix that:
init(memberName: String, memberJob: String, memberLanguage: String, memberPrice: String, memberSpecification: String) {
self.memberName = memberName
self.memberJob = memberJob
self.memberLanguage = memberLanguage
self.memberPrice = memberPrice
self.memberSpecification = memberSpecification
}
var dictValue: [String : Any] {
return ["memberName" : memberName,
"memberJob" : memberJob,
"memberLanguage" : memberLanguage,
"memberPrice" : memberPrice,
"memberSpecification" : memberSpecification]
}
init?(snapshot: DataSnapshot) {
guard let dict = snapshot.value as? [String : Any],
let memberName = dict["memberName"] as? String,
let memberJob = dict["memberJob"] as? String,
let memberLanguage = dict["memberLanguage"] as? String,
let memberPrice = dict["memberPrice"] as? String,
let memberSpecification = dict["memberSpecification"] as? String
else { return nil }
self.key = snapshot.key
self.memberName = memberName
self.memberJob = memberJob
self.memberLanguage = memberLanguage
self.memberPrice = memberPrice
self.memberSpecification = memberSpecification
}
}
import Foundation
import FirebaseAuth.FIRUser
import FirebaseDatabase
import FirebaseUI
import FirebaseAuth
struct UserService {
static func members(for user: User, completion: @escaping ([TeamMember]) -> Void) {
let ref = Database.database().reference().child("team").child(user.uid)
ref.observeSingleEvent(of: .value, with: { (snapshot) in
guard let snapshot = snapshot.children.allObjects as? [DataSnapshot] else {
return completion([])
}
let members = snapshot.reversed().compactMap(TeamMember.init)
completion(members)
})
}
}
//
// TeamMemberDetailsViewController.swift
// ProLabArtv2
//
// Created by Manu on 09.06.20.
// Copyright © 2020 Manuel Knott. All rights reserved.
//
import UIKit
import FirebaseDatabase
import FirebaseAuth
import FirebaseStorage
class TeamMemberDetailsViewController: UIViewController {
// MARK: - Properties
@IBOutlet weak var nameLabel: UILabel!
@IBOutlet weak var jobLabel: UILabel!
@IBOutlet weak var specificationLabel: UILabel!
@IBOutlet weak var languageLabel: UILabel!
@IBOutlet weak var priceLabel: UILabel!
@IBOutlet weak var scoreLabel: UILabel!
@IBOutlet weak var newScoreButton: UIButton!
@IBOutlet weak var projectsPartButton: UIButton!
var member: TeamMember?
override func viewDidLoad() {
super.viewDidLoad()
setUI()
}
func setUI() {
nameLabel.text = member?.memberName
jobLabel.text = member?.memberJob
specificationLabel.text = member?.memberSpecification
languageLabel.text = member?.memberLanguage
priceLabel.text = member?.memberPrice
// scoreLabel.text = member?.
}
}
那是 ProjectViewController 的那個,我在其中使用 switch 語句......
// HomeViewController.swift
// ProLabArtv2
//
//
import UIKit
import Kingfisher
import Foundation
import FirebaseStorage
import FirebaseDatabase
class HomeViewController: UIViewController {
// MARK: - Properties
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var addProject: UIButton!
var posts = [Post]()
var textToBeSent: String = ""
override func viewDidLoad() {
super.viewDidLoad()
UserService.posts(for: User.current) { (posts) in
self.posts = posts
self.tableView.reloadData()
}
Utilities.addShadowtoButton(addProject)
}
func configureTableView() {
// remove separators for empty cells
tableView.tableFooterView = UIView()
// remove separators from cells
tableView.separatorStyle = .none
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "toDetails" {
let destVC = segue.destination as! ShowProjectDetailsViewController
destVC.post = sender as? Post
}
}
}
// MARK: - UITableViewDataSource
extension HomeViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
let post = posts[indexPath.row]
performSegue(withIdentifier: "toDetails", sender: post)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 2
}
func numberOfSections(in tableView: UITableView) -> Int {
return posts.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let post = posts[indexPath.section]
switch indexPath.row {
case 0:
let cell = tableView.dequeueReusableCell(withIdentifier: "PostImageCell") as! PostImageCell
let imageURL = URL(string: post.imageURL)
cell.postImageView.kf.setImage(with: imageURL)
return cell
case 1:
let cell = tableView.dequeueReusableCell(withIdentifier: "PostSubCell") as! PostSubCell
cell.projectName.text = post.projectTitle
return cell
default:
fatalError("Error: unexpected indexPath.")
}
}
}
// MARK: - UITableViewDelegate
extension HomeViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
switch indexPath.row {
case 0:
let post = posts[indexPath.section]
return post.imageHeight
case 1:
return PostSubCell.height
default:
fatalError()
}
}
}
希望有人能幫助我:)
這是我們在某些時候都犯過的錯誤之一,通常是因為沒有仔細閱讀自動完成。
你的代碼是
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath)
您使用的是didDeselectRowAt
而不是didSelectRowAt
方法。 這意味着它會在該行失去焦點時運行它(當您單擊另一行時)。
你需要
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
...
您使用了錯誤的委托方法。 在選擇而不是取消選擇單元格時執行 segue
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let post = posts[indexPath.row]
performSegue(withIdentifier: "toDetails", sender: post)
}
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