CellForRowAtIndexPath not Called when reloading table data - swift

Question

I've worked through a lot of answers like this one but I'm still stuck.
I have a viewcontroller with a collectionView and a searchController. When the user searches I want to display a UITableView on top of the collectionView. I'm trying to add the tableview programmatically b/c it's a simple text label I'm displaying
I am able to display the search results for the dummy array I have in viewdidload of my tableviewcontroller class. However when I get the actual results, I can only print them in the numberOfRows function.
All help would be greatly appreciated, here's my code:
This is my TableView Class:
import UIKit
class HashtagSearchList: UITableViewController {
var hashtagListTableview = UITableView()
var hashtagList = [String]()
override func viewDidLoad() {
super.viewDidLoad()
hashtagList = ["One", "Two", "Three"]
hashtagListTableview.delegate = self
hashtagListTableview.dataSource = self
}
// MARK: - Table view data source
//I don't need this, but added it based on some answers... didn't help
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//All these print statements show correct values
print("List Count = \(hashtagList.count)")
print("List of Strings: \(hashtagList)")
print("frame size = \(tableView.frame)")
return hashtagList.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
//This print statement only fires on ViewdidLoad
print("cellForRowAt = \(hashtagList[indexPath.row])")
cell.textLabel?.text = hashtagList[indexPath.row]
cell.backgroundColor = .red
return cell
}
}
Here is my ViewController / SearchController code:
class ExploreVC: UIViewController {
var hashtagSearchController = HashtagSearchList()
override func viewDidLoad() {
super.viewDidLoad()
//Search Controller
navigationItem.searchController = searchController
searchController = UISearchController(searchResultsController: hashtagSearchController)
}
//......
// SEARCH CONTROLLER
extension ExploreVC: UISearchResultsUpdating {
func updateSearchResults(for searchController: UISearchController) {
let searchText = searchController.searchBar.text
if searchText == "" { return }
PostFirebase.getHashtagList(hashtag: searchText) { (hashtagList) in
self.hashtagSearchController.hashtagListTableview.frame = CGRect(x: 0.0, y: 0.0, width: self.view.bounds.width, height: self.view.bounds.height)
self.hashtagSearchController.hashtagList = hashtagList
//self.hashtagSearchController.hashtagListTableview.reloadData()
DispatchQueue.main.async {
self.hashtagSearchController.hashtagListTableview.reloadData()
}
}
}
}
}
Here is the tableview from viewDidLoad, and it never changes from here

Answer 1

You initialized hashtagListTableview in HashtagSearchList but you didn't add layout constraints. By default, it will have .zero frame and won't be displayed on the screen.
I guess that the table view on the screen is tableView from UITableViewController. That's why nothing happened when you call self.hashtagSearchController.hashtagListTableview.reloadData().
To fix it, try to use tableView instead of hashtagListTableview. Replace
self.hashtagSearchController.hashtagListTableview.reloadData()
with
self.hashtagSearchController.tableView.reloadData()