Not able to call tableView Delegate and DataSource methods

Question

I've designed a tableView and tableViewCell programatically, without the use of storyboards. My viewDidLoad() in the ViewController looks something like this:

tableView.delegate = self
tableView.dataSource = self
tableView.register(TicketsTableViewCell.self,forCellReuseIdentifier:cellReuseIdentifier)
tableView = UITableView(frame: UIScreen.main.bounds, style: .plain)
self.view.addSubview(tableView)

And my tableViewCell looks something like this:

class TicketsTableViewCell: UITableViewCell {

override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)

    //Other View related stuff
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}
required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}

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

The thing is, when I run it, I'm able to see the tableView, but not the cells. Furthermore, when I add a breakpoint at cellForRowAt:, it does not get called. What is that I'm doing wrong? Is there something wrong I'm doing with the reuse identifier? Thanks in advance.

can you check numberOfSectionsInTableView or other delegate method call or not ? - http://stackoverflow.com/questions/24023613/programmatically-uitableview-using-swift — Mitesh jadav, Mar 11 '17 at 09:23
What is the data source? How many elements are there? The table requires these pieces of information. — El Tomato, Mar 11 '17 at 09:24
The data source is a dictionary, even the `numberOfRowsInSection` is not getting called. @ElTomato — shravan.sukumar, Mar 11 '17 at 09:33
None of the delegate methods are getting called. @Miteshjadav — shravan.sukumar, Mar 11 '17 at 09:33
did you include UITableViewDelegate, UITableViewDataSource in your UIViewController definition? — Russell, Mar 11 '17 at 10:01

score 2 · Accepted Answer · answered Mar 11 '17 at 10:02

2

The problem is first you have set delegate and datasource of tableView after that you are re-initializing the tableView with line tableView = UITableView(frame: UIScreen.main.bounds, style: .plain) so put that line first then set delegate and datasource and register cell.

tableView = UITableView(frame: UIScreen.main.bounds, style: .plain)
tableView.delegate = self
tableView.dataSource = self
tableView.register(TicketsTableViewCell.self, forCellReuseIdentifier: cellReuseIdentifier)
self.view.addSubview(tableView)

answered Mar 11 '17 at 10:02

Nirav D

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Thanks. This worked. Couldn't believe such a small mistake I've made. – shravan.sukumar Mar 11 '17 at 13:43
@shravan.sukumar Welcome mate :) – Nirav D Mar 11 '17 at 16:44

score 0 · Answer 2 · answered Mar 11 '17 at 09:52

Try like this may help for you

 class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource
 {

var tableView : UITableView!


override func viewDidLoad() {
    super.viewDidLoad()

    self.view.backgroundColor = UIColor.whiteColor()
    self.setUpTableView()

}
func setUpTableView()
{
    // Create only one table view.
    tableView = UITableView(frame: CGRectMake(self.view.frame.size.width / 10, self.view.frame.size.height / 2, self.view.frame.size.width - self.view.frame.size.width / 5, self.view.frame.size.height / 2 - 20), style: UITableViewStyle.Grouped)
    tableView.dataSource = self
    tableView.delegate = self
    tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
    tableView.layer.cornerRadius = 10
    tableView.layer.borderColor = UIColor.blackColor().CGColor
    tableView.layer.borderWidth = 2
    self.view.addSubview(tableView)
}
//table view data source

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

    return 3
}

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

    let cell : UITableViewCell = tableView.dequeueReusableCellWithIdentifier("cell") as! UITableViewCell

    cell.textLabel?.text = "test"
    cell.textLabel?.numberOfLines = 0

    return cell

  }

 }

Not able to call tableView Delegate and DataSource methods

2 Answers2