How to programmatically segue from searchbar to display screen - swift

Question

So I have recently coded a search bar programmatically using tableview and navigation control. I am now having trouble finding information on how to segue the search bar after the user clicks on an item in the search bar.
I have tried using a view controller but that has not worked. I think my best bet is to do it programmatically.
EDIT There is no function yet in this code to implement a display screen. Im wondering what code is needed (im a very new developer) to get to another screen after clicking an element in the search bar. anything helps!!***
import UIKit
class SearchTableViewController: UITableViewController, UISearchBarDelegate {
let searchBar = UISearchBar()
let tableData = ["Boston University", "Boston College", "Northeastern University", "Suffolk University", "American University", "Harvard University", "Massachusetts Institute of Technology", "Tufts University", "Berklee College of Music", "Emerson College"]
//variables added for search function
var filteredArray = [String()]
var shouldShowSearchResults = false
override func viewDidLoad() {
super.viewDidLoad()
createSearcherBar()
}
func createSearcherBar() {
searchBar.showsBookmarkButton = false
searchBar.placeholder = "Search College"
searchBar.delegate = self
self.navigationItem.titleView = searchBar
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
filteredArray = tableData.filter({ (names: String) -> Bool in
return names.range(of: searchText, options: .caseInsensitive) != nil
})
if searchText != "" {
shouldShowSearchResults = true
self.tableView.reloadData()
}
else{
shouldShowSearchResults = false
self.tableView.reloadData()
}
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
if shouldShowSearchResults {
return filteredArray.count
}
else{
return tableData.count
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "basicCell", for: indexPath)
if shouldShowSearchResults {
cell.textLabel!.text = filteredArray[indexPath.row]
return cell
}
else{
cell.textLabel!.text = tableData[indexPath.row]
return cell
}
}
override func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
searchBar.endEditing(true)
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
shouldShowSearchResults = true
searchBar.endEditing(true)
self.tableView.reloadData()
}
/*
// Override to support conditional editing of the table view.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
*/
/*
// Override to support editing the table view.
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
// Delete the row from the data source
tableView.deleteRows(at: [indexPath], with: .fade)
} else if editingStyle == .insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return true
}
*/
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destination.
// Pass the selected object to the new view controller.
}
*/
}
Hopefully I can get a user to click on one of the options in a search bar, and it brings them to a different page.

Answer 1

First of all your method textDidChange is unnecessarily expensive because you are always filtering the array even if the search text is empty. This is more efficient
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
if searchText.isEmpty {
shouldShowSearchResults = false
filteredArray.removeAll() // good practice to release memory when the search is finished
} else {
filteredArray = tableData.filter{ $0.range(of: searchText, options: .caseInsensitive) != nil }
shouldShowSearchResults = true
}
self.tableView.reloadData()
}
Second of all the declaration of filteredArray is slightly wrong. The parentheses must be outside the brackets. Your syntax declares a string array containing one empty string.
var filteredArray = [String]()
To answer your question implement didSelectRowAt and add the same shouldShowSearchResults logic to distinguish the arrays. Call performSegue and pass the string as sender
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let item = shouldShowSearchResults ? filteredArray[indexPath.row] : tableData[indexPath.row]
performSegue(withIdentifier: "MyIdentifier", sender: item)
}
and get it in prepare(for segue
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
guard segue.identifier == "MyIdentifier" else { return }
let destinationController = segue.destination as! MyViewController
let item = sender as! String
...