недавно в поисковике VC моего приложения у меня были серьезные проблемы с ограничениями в течение нескольких недель. Я переделал их 4 раза без каких-либо улучшений. Моя ячейка табличного представления не сложна - imageView расположен слева и две метки друг над другом. Размер большинства клеток в порядке. Единственное, что (без рисунка) две ячейки случайно перепутаны (метки и imageView перемещаются далеко не к месту). Вы можете увидеть здесь:
Вот изображение ограничений для vc:
Странно то, что это иногда происходит, когда я переключаю кнопки видимости вверх. Я посмотрел в своем коде, чтобы посмотреть, смогу ли я это исправить, когда scopeButton перезагрузит табличное представление, но я не смог найти проблемный экземпляр. Мой код ниже:
import UIKit
import Firebase
import Kingfisher
class SearchPostsController: UIViewController, UITableViewDataSource, UITableViewDelegate {
@IBOutlet weak var searchBar: UISearchBar!
@IBOutlet weak var tableView: UITableView!
var idArray:[String] = []
var detailViewController: DetailViewController? = nil
var candies = [Person]()
var filteredCandies = [Person]()
let searchController = UISearchController(searchResultsController: nil)
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
if #available(iOS 11.0, *) {
navigationItem.hidesSearchBarWhenScrolling = false
//initiate the search bar that appears up top when view is segued to
}
if let selectionIndexPath = self.tableView.indexPathForSelectedRow {
self.tableView.deselectRow(at: selectionIndexPath, animated: animated)
}
self.tableView.reloadData()
super.viewWillAppear(animated)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if #available(iOS 11.0, *) {
navigationItem.hidesSearchBarWhenScrolling = true
}
}
override func viewDidLoad() {
super.viewDidLoad()
Database.database().reference()
.child("\(UserData().mySchool!)/posts")
.queryOrderedByKey()//keys were out of order, so we have to use this to help
.observeSingleEvent(of: .value, with: { (snapshot) in
print(snapshot.childrenCount)
for child in snapshot.children.allObjects as! [DataSnapshot] {
print(child.key)
self.idArray.append(child.key)
}
var reversedNames = [String]()
for arrayIndex in 0..<self.idArray.count {
reversedNames.append(self.idArray[(self.idArray.count - 1) - arrayIndex])
//reverse names so we dont have to sort the cells by date
}
for x in reversedNames{
self.searchNames(id: x)//get names from the ids here, tada!!!
self.tableView.reloadData()
}
})
//self.tableView.reloadData()//without this, the results wouldnt show up right away
searchController.searchBar.setScopeBarButtonTitleTextAttributes([NSAttributedStringKey.foregroundColor.rawValue: UIColor.white], for: .normal)
searchController.searchBar.scopeButtonTitles = ["Posts", "Users"]
searchController.searchBar.delegate = self
searchController.searchResultsUpdater = self
searchController.obscuresBackgroundDuringPresentation = false
searchController.searchBar.placeholder = "Search posts or usernames"
searchController.searchBar.showsScopeBar = true
navigationItem.searchController = searchController
definesPresentationContext = true
if let splitViewController = splitViewController {
let controllers = splitViewController.viewControllers
detailViewController = (controllers[controllers.count-1] as! UINavigationController).topViewController as? DetailViewController
}
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 74
}
// override func viewWillDisappear(_ animated: Bool) {
// candies.removeAll()
// }
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "DAY69:GRADUATION DAY", for: indexPath) as! SeachCell
cell.cellImageVIew.frame.size.width = 48
cell.cellImageVIew.frame.size.height = 48
let personUser: Person
if isFiltering() {
personUser = filteredCandies[indexPath.row]
} else {
personUser = candies[indexPath.row]
}
//PERSON USER IS IMPORTANT!!!!! ^^^
cell.nameLabel.text = personUser.name.removingPercentEncoding
cell.messageLabel.text = personUser.category.removingPercentEncoding
let name = personUser.name
Database.database().reference().child("users/\(name)/profileImageURL").observe(.value, with: { (snapshot) in
let profURL = "\(snapshot.value!)"
let profIRL = URL(string: profURL)
//set up imageview
cell.cellImageVIew.layer.borderWidth = 1
cell.cellImageVIew.layer.masksToBounds = false
cell.cellImageVIew.layer.borderColor = UIColor.black.cgColor
cell.cellImageVIew.layer.cornerRadius = cell.cellImageVIew.frame.height/2
cell.cellImageVIew.clipsToBounds = true
cell.cellImageVIew.contentMode = .scaleAspectFill
cell.cellImageVIew.kf.indicatorType = .activity
cell.cellImageVIew.kf.setImage(with: profIRL)
})
//TODO: make an extension of imageview to do all this for me. It's getting to be ridiculous
return cell
}
func searchNames(id: String){
// var message = String()
// var name = String()
Database.database().reference().child("\(UserData().mySchool!)/posts/\(id)/message").observe(.value, with: { (snapshot) in
// message = snapshot.value as! String
Database.database().reference().child("\(UserData().mySchool!)/posts").child("\(id)/username").observe(.value, with: { (username) in
// name = username.value as! String
let user = Person(category: "\(snapshot.value!)", name: "\(username.value!)", id: id)
self.candies.append(user)
print( "\(snapshot.value!)", "\(username.value!)")
self.tableView.reloadData()
})
})
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if isFiltering() {
return filteredCandies.count
}
return candies.count
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
tableView.estimatedRowHeight = 74.0
tableView.rowHeight = UITableViewAutomaticDimension
return UITableViewAutomaticDimension
}
// func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
// return 74
// }
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let cell = tableView.dequeueReusableCell(withIdentifier: "DAY69:GRADUATION DAY", for: indexPath) as! SeachCell
cell.cellImageVIew.frame.size.width = 48
cell.cellImageVIew.frame.size.height = 48
let searchBar = searchController.searchBar
let scope = searchBar.scopeButtonTitles?[searchBar.selectedScopeButtonIndex]
if scope == "Users"{
let username = candies[indexPath.row].name
print(username)
self.tableView.deselectRow(at: indexPath, animated: true)
performSegue(withIdentifier: "userClicked", sender: username)
}
if scope == "Posts"{
let post = candies[indexPath.row].category
let user = candies[indexPath.row].name
let id = candies[indexPath.row].id
print(post)
let defaults = UserDefaults.standard
defaults.set(id, forKey: "ID")
let def2 = UserDefaults.standard
def2.set(post, forKey: "Post")
def2.set(user, forKey: "USER")
self.tableView.deselectRow(at: indexPath, animated: true)
performSegue(withIdentifier: "postCellTapped", sender: nil)
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
//__________tbv methods above________________________________________________
func searchBarIsEmpty() -> Bool {
// Returns true if the text is empty or nil
return searchController.searchBar.text?.isEmpty ?? true
}
func filterContentForSearchText(_ searchText: String, scope: String = "All") {
filteredCandies = candies.filter({(candy : Person) -> Bool in
let doesCategoryMatch = (scope == "Posts") || (scope == "Users")
print(searchText)
if searchBarIsEmpty() {
return doesCategoryMatch
}
if scope == "Users"{
return doesCategoryMatch && candy.name.lowercased().contains(searchText.addingPercentEncoding(withAllowedCharacters: .alphanumerics)!.lowercased())
}
else{
return doesCategoryMatch && candy.category.lowercased().contains(searchText.addingPercentEncoding(withAllowedCharacters: .alphanumerics)!.lowercased())
}
})
tableView.reloadData()
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showDetail" {
if let indexPath = tableView.indexPathForSelectedRow {
let personalUser: Person
if isFiltering() {
personalUser = filteredCandies[indexPath.row]
} else {
personalUser = candies[indexPath.row]
}
}
}
if segue.identifier == "userClicked" {
if let nextView = segue.destination as? UserProfileController {
nextView.selectedUser = "\(sender!)"
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func isFiltering() -> Bool {
let searchBarScopeIsFiltering = searchController.searchBar.selectedScopeButtonIndex != 0
return searchController.isActive && (!searchBarIsEmpty() || searchBarScopeIsFiltering)
}
}
extension SearchPostsController: UISearchResultsUpdating {
// MARK: - UISearchResultsUpdating Delegate
func updateSearchResults(for searchController: UISearchController) {
let searchBar = searchController.searchBar
let scope = searchBar.scopeButtonTitles![searchBar.selectedScopeButtonIndex]
filterContentForSearchText(searchController.searchBar.text!, scope: scope)
}
}
extension SearchPostsController: UISearchBarDelegate {
// MARK: - UISearchBar Delegate
func searchBar(_ searchBar: UISearchBar, selectedScopeButtonIndexDidChange selectedScope: Int) {
filterContentForSearchText(searchBar.text!, scope: searchBar.scopeButtonTitles![selectedScope])
}
}
Любая помощь будет принята с благодарностью при попытке устранить ограничения! Спасибо!