Can't Override UItableviewdatasource and UItableviewdelegate

Unable to override UITableView delegate methods in UIViewController

Since you are no longer writing a subclass of UITableViewController you no longer override its delegate and datasource functions, but you are providing your own implementation to conform to those protocols. Swift strictly checks if the method you are declaring to override is in fact already implemented in the base class. This was true with the UITableViewController, but it's no longer the case with UIViewController.

In short: drop the override keyword from the delegate and dataSource functions.

UITableView delegate and datasource in external class does not work

Your main problem is that TbController() get deallocated. dataSource and delegate properties on UITableView are weak. Therefor, because you only assign TbController to a local variable and to the weak properties, it will get deallocated.

Also, the UITableViewController already creates a TableView for you. It is not good practice to "recreate" it. I would rather make use of the TableView in the UITableViewController and add the UITableViewController's view as a subview to your UIViewController's view.

To fix, you need an instance variable for TbController.

Sample code with ivar for TbController and making use of Tbcontroller's UITableView.

 import UIKit

    class ViewController: UIViewController {

    var cont: Tbcontroller = Tbcontroller()

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        cont.type = 1
        self.view.addSubview(cont.view)
    }

}

    import UIKit

    class Tbcontroller: UITableViewController {

    var type:Int = 1

    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.scrollEnabled = false
        tableView.separatorStyle = .None
        tableView.allowsSelection = true
        tableView.userInteractionEnabled = true

        self.tableView.delegate = self
        self.tableView.dataSource = self
    }

    func getCell() -> UITableViewCell{
        let presentCell: UITableViewCell = UITableViewCell()
        return presentCell

    }

    // MARK: - Table view data source

    override func numberOfSectionsInTableView(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
        return 4
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        let cell = getCell()
        cell.textLabel?.text = "ciao"
        cell.textLabel?.font = UIFont.systemFontOfSize(13)

        return cell

    }

    override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {

        return 100

    }

    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

        print("clicked")

    }

}

UITableView does not conform to protocol UITableViewDataSource error

You have incorrectly set up your ViewController. Either create a UITableViewController which is just a UITableView, or add a UITableView to a UIViewController (Like you have almost done).

The didSelectRowAt method will allow you to segue to a new viewController, but in my examples only if it is set up correctly in a storyboard.


UITableViewController option

class TableViewController: UITableViewController {

override func viewDidLoad() {
    super.viewDidLoad()
}

// MARK: - Table view data source

override func numberOfSections(in tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 0
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return 0
}

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier", for: indexPath)
    // Configure the cell...
    return cell
}

// MARK: - Table view delegate

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: false)
    performSegue(withIdentifier: "SegueIdentifier", sender: self)
}

UIViewController option
(The UITableView will need to be added through a Storyboard in this example)

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()
    tableView.delegate = self
    tableView.dataSource = self
}

// MARK: - Table view data source

func numberOfSections(in tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 0
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return 0
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier", for: indexPath)
    // Configure the cell...
    return cell
}

// MARK: - Table view delegate

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: false)
    performSegue(withIdentifier: "SegueIdentifier", sender: self)
}

Here is an example project to work from

Can't use UITableViewDataSource with custom cell

Try the opposite:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = BaseCell()
    return cell
}

But you probably want to use something like:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("BaseCell") as? BaseCell
    return cell!
}

Make sure you set "BaseCell" as your cell identifier, as following:

If you get a runtime error like "Found nil while unwrapping optional", you need to see BaseCell as the class for your cell, see picture:

Swift. Why doesn't work UITableView delegates?

In example you provided they connect delegate and datasource of tableView via Storyboard not from code .. thats why it confused you .. you have option .. Either you set them in storyboard or set them in code ...

this is how you can do it in storyboard.. Control + drag to controller .. you will get options to check both .. delegate and dataSource

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