Sorting custom table view cells in Swift - ios

Question

I am working on an small project where I have an app that takes in tvshow information entered by the user and displays it in a custom tableview cell. I would like to sort the shows as they are entered based on which current episode the user is on. I know this code works because I tested it with print statements and it sorts the array but it does not sort on the simulator. So I just was curious where I should place this so that it sorts on the app side.
func sortShows() {
let sortedShows = tvShows.sorted { $0.currentEpisode > $1.currentEpisode}
TVShowTableView.reloadData()
print(sortedShows)
}
Here is where I am currently placing it inside my view controller
extension TVShowListViewController: AddTVShowDelegate {
func tvShowWasCreated(tvShow: TVShow) {
tvShows.append(tvShow)
dismiss(animated: true, completion: nil)
TVShowTableView.reloadData()
sortShows()
}
}

Answer 1

In this part of your code:
func sortShows() {
// here you are creating a NEW array
let sortedShows = tvShows.sorted { $0.currentEpisode > $1.currentEpisode}
// here you tell the table view to reload with the OLD array
TVShowTableView.reloadData()
print(sortedShows)
}
In your controller class, you probably have something like:
var tvShows: [TVShow] = [TVShow]()
and then you populate it with shows, like you do with a new show:
tvShows.append(tvShow)
Then your controller is doing something like:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "tvShowCell", for: indexPath) as! TVShowCell
cell.tvShow = tvShows[indexPath.row]
return cell
}
What you want to do is add another var to your class:
var sortedShows: [TVShow] = [TVShow]()
then change your sort func to use that array:
func sortShows() {
// use the existing class-level array
sortedShows = tvShows.sorted { $0.currentEpisode > $1.currentEpisode}
// here you tell the table view to reload
TVShowTableView.reloadData()
print(sortedShows)
}
and change your other funcs to use the sortedShows array:
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// use sortedShows array
return sortedShows.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "tvShowCell", for: indexPath) as! TVShowCell
// use sortedShows array
cell.tvShow = sortedShows[indexPath.row]
return cell
}
and you'll want to call sortShows() at the end of viewDidLoad() (or wherever you are getting your initial list of shows).
Edit
Another way you might use cellForRowAt:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "tvShowCell", for: indexPath) as! TVShowCell
// use sortedShows array
let tvShow = sortedShows[indexPath.row]
cell.showTitleLable.text = tvShow.title
cell.showDecriptionLable.text = tvShow.description
return cell
}