Use of unresolved identifier? Could someone help please :)

Question

Created Aug ’20

Replies 3

Boosts 0

Participants 2

Hi, This is one of my first projects and I am stuck, my variable "quotes" is saved as a bunch of quotes in a list, I am trying to make the amount of columns in a table be the number of quotes and the tables boxes have the quote inside them as their text. :) thanks

my code:

{code}

import UIKit

class QuoteTableViewController: UITableViewController {

override func viewDidLoad() {

super.viewDidLoad()

}

// MARK: - Table view data source







override func numberOfSections(in tableView: UITableView) -> Int {

return 1

}





override func tableView( tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

return quotes.count

}

override func tableView( tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

let cell = UITableViewCell ()

cell.textLabel?.text = quotes[indexPath.row]

return cell

}



class QuoteTabelViewController: UITableViewController {



   var quotes = [
":)",
":(",
]

}

{code}

Answered by Claude31 in 627578022

Please, when you paste code, use Paste And Match Style to avoid all the blank lines that make code very hard to read.
And use the code formatter tool (<>)

Code Block import UIKit
class QuoteTableViewController: UITableViewController {
		override func viewDidLoad() {
				super.viewDidLoad()
		}
		// MARK: - Table view data source
		override func numberOfSections(in tableView: UITableView) -> Int {
				return 1
		}
		override func tableView( tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
				return quotes.count
		}
		override func tableView( tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
				let cell = UITableViewCell ()
				cell.textLabel?.text = quotes[indexPath.row]
				return cell
		}
		class QuoteTabelViewController: UITableViewController {
				 var quotes = [
						":)",
						":(",
						]
		}

Now, for the errors:
quotes is defined in another class (QuoteTabelViewController), so it is unknown in QuoteTableViewController

Is it on purpose that one class is called QuoteTableViewController and the other QuoteTabelViewController : if so, that's very confusing.

But I understand that it should be the same class.

In addition, signatures of delegate func are wrong, they miss a starting underscore:

Code Block     override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

In cellForRow, you should not create a cell, but dequeue.
Assuming cell ID is CellItem
let cell = tableView.dequeueReusableCell(withIdentifier: "CellItem", for: indexPath)

Hence code should be (delete QuoteTabelViewController):

Code Block import UIKit
class QuoteTableViewController: UITableViewController {
		var quotes = [
			 ":)",
			 ":(",
			 ]
		override func viewDidLoad() {
				super.viewDidLoad()
		}
		// MARK: - Table view data source
		override func numberOfSections(in tableView: UITableView) -> Int {
				return 1
		}
		override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
				return quotes.count
		}
		override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
			 // REMOVE THIS.	let cell = UITableViewCell ()
        let cell = tableView.dequeueReusableCell(withIdentifier: "CellItem", for: indexPath)
				cell.textLabel?.text = quotes[indexPath.row]
				return cell
		}
}

Boost

Answer 1

Frank_0_ OP

Aug ’20

I forgot to mention, the problems are the lines:
return quotes.count
and
cell.textLabel?.text = quotes[indexPath.row]

1

Answer 2

Claude31 OP

Aug ’20

Accepted Answer

Please, when you paste code, use Paste And Match Style to avoid all the blank lines that make code very hard to read.
And use the code formatter tool (<>)

Code Block import UIKit
class QuoteTableViewController: UITableViewController {
		override func viewDidLoad() {
				super.viewDidLoad()
		}
		// MARK: - Table view data source
		override func numberOfSections(in tableView: UITableView) -> Int {
				return 1
		}
		override func tableView( tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
				return quotes.count
		}
		override func tableView( tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
				let cell = UITableViewCell ()
				cell.textLabel?.text = quotes[indexPath.row]
				return cell
		}
		class QuoteTabelViewController: UITableViewController {
				 var quotes = [
						":)",
						":(",
						]
		}

Now, for the errors:
quotes is defined in another class (QuoteTabelViewController), so it is unknown in QuoteTableViewController

Is it on purpose that one class is called QuoteTableViewController and the other QuoteTabelViewController : if so, that's very confusing.

But I understand that it should be the same class.

In addition, signatures of delegate func are wrong, they miss a starting underscore:

Code Block     override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

In cellForRow, you should not create a cell, but dequeue.
Assuming cell ID is CellItem
let cell = tableView.dequeueReusableCell(withIdentifier: "CellItem", for: indexPath)

Hence code should be (delete QuoteTabelViewController):

Code Block import UIKit
class QuoteTableViewController: UITableViewController {
		var quotes = [
			 ":)",
			 ":(",
			 ]
		override func viewDidLoad() {
				super.viewDidLoad()
		}
		// MARK: - Table view data source
		override func numberOfSections(in tableView: UITableView) -> Int {
				return 1
		}
		override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
				return quotes.count
		}
		override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
			 // REMOVE THIS.	let cell = UITableViewCell ()
        let cell = tableView.dequeueReusableCell(withIdentifier: "CellItem", for: indexPath)
				cell.textLabel?.text = quotes[indexPath.row]
				return cell
		}
}

1

Answer 3

Frank_0_ OP

Aug ’20

Thank You! :) I was following a book tutorial,
Sorry for any inconvenience and have a nice day! :)

1