Finding the [indexpath.row] value in a TableView - ios

Question

Essentially I am attempting to change a variable when a specific row is selected however, the code is still printing -1. Here is all my code relating. I am trying to be able to click a certain tableview cell and then be able to print out that text. Would the searchBar effect my values? I first code the tableview and then the searchbar and then I implement a submit button which prints the values of my variables.
class ViewController: UIViewController, UITableViewDataSource, UISearchBarDelegate, UITableViewDelegate {
#IBOutlet weak var searchBar: UISearchBar!
#IBOutlet weak var tableView: UITableView!
let Data = ["dog","cat","goat"]
var filteredData: [String]!
var num = -1
var animal: String = ""
override func viewDidLoad() {
super.viewDidLoad()
if tableView != nil {
self.tableView.dataSource = self
}
filteredData = Data
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as UITableViewCell
cell.textLabel?.text = filteredData[indexPath.row]
print(indexPath.row)
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return filteredData.count
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if indexPath.row == 0 {
num = 0
}
if indexPath.row == 1 {
num = 1
}
if indexPath.row == 2 {
num = 2
}
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
filteredData = searchText.isEmpty ? Data : Data.filter { (item: String) -> Bool in
// If dataItem matches the searchText, return true to include it
return item.range(of: searchText, options: .caseInsensitive, range: nil, locale: nil) != nil
}
tableView.reloadData()
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
self.searchBar.showsCancelButton = true
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchBar.showsCancelButton = false
searchBar.text = ""
searchBar.resignFirstResponder()
}
#IBAction func Submit(_ sender: Any) {
print(num)
print(filteredData.count)
if num == 0 {
animal = "dog"
}
if num == 1 {
animal = "cat"
}
if num == 2 {
animal = "goat"
}
print(animal)
}
}

Answer 1

There are a few issues that are not allowing you to achieve what you want:
The == operator is checking if two variables are equal to each other, not assigning one variable to another, and it will return a boolean value, either true or false. In the body of your if statements, change == to = to assign a value to the variable num.
Change your code to:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if indexPath.row == 0 {
num = 0
}
if indexPath.row == 1 {
num = 1
}
if indexPath.row == 2 {
num = 2
}
}
After seeing your updated code, it looks like you only set the dataSource of the tableView and not the delegate. You need to add the line to viewDidLoad:
tableView.delegate = self
Also, instead of having multiple if statements to check the indexPath, you could replace that entire body of code with one line:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
num = indexPath.row
}