UITableView programmatically in Swift Empty

Question

I'm making a UITableView in swift programmatically. With the following code (I have UITableViewDelegate and UITableViewDataSource in there):

var tableView = UITableView()
override func viewDidLoad() {
    super.viewDidLoad()

    tableView.frame = CGRectMake(25, 180, 220, 150)
    tableView.delegate = self
    tableView.delegate = self
    tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "Cell")
    self.view.addSubview(tableView)
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return 1
}


func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return options.count
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    var cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! UITableViewCell
    cell.textLabel?.text = options[indexPath.row]

    println("cell label is")
    println(cell.textLabel!.text)

    return cell
}

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return 30
}

The table is coming blank, however. The cells don't show up. Any advice?

It means options.count has problem. Can you try print options.count int ? — tuledev
– tuledev, Commented Aug 21, 2015 at 1:34
Do you want options.count sections? and 1 row? func numberOfSectionsInTableView(tableView: UITableView) -> Int { return options.count } func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return 1 } — tuledev
– tuledev, Commented Aug 21, 2015 at 1:35
Why tableView.delegate initialized twice in viewDidLoad?One of them must be datasource isn't it? — merge
– merge, Commented Aug 21, 2015 at 1:36

merge · Accepted Answer · 2015-08-21 01:42:40Z

1

Why tableView.delegate initialized twice in viewDidLoad?One of them must be datasource isn't it?

override func viewDidLoad() {
    super.viewDidLoad()
    tableView.frame = CGRectMake(25, 180, 220, 150)
    tableView.delegate = self
    tableView.datasource = self
    tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "Cell")
    self.view.addSubview(tableView)
}

answered Aug 21, 2015 at 1:42

merge

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Comments

Felipe Cypriano · Accepted Answer · 2015-08-21 01:19:15Z

0

Call tableView.reloadData() after adding it to self.view in viewDidLoad.

answered Aug 21, 2015 at 1:19

Felipe Cypriano

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4 Comments

Felipe Cypriano Over a year ago

Print your options.count to see if you have data to show.

Felipe Cypriano Over a year ago

If you have only 1 row per section why use section? Move return options.count to numberOfRowsInSection and delete numberOfSectionsInTableView (the default is 1)

shaydawg Over a year ago

the options array is being filled. i print it after i query. right after that, i do tableView.reloadData()

Felipe Cypriano Over a year ago

Post the actual code please, there is no print in the one you posted. Are your delegates called?

Lamour · Accepted Answer · 2015-08-21 01:28:48Z

0

Not only you are missing self.tableView.reloadData() . What do you have inside of the data structure options where are you getting the data from?

you said you are Querying from parse :

 var query = PFQuery(className: "whatever class name")
    query.findObjectsInBackgroundWithBlock { (objects:[AnyObject]?, error:NSError?) -> Void in
        if error == nil {

            if let newObjects = objects as? [PFObject]{

                for one in newObjects {


                    var message = one["TextMessage"] as! String
                    // so add this data message data into your array 
                    // then reload Data
                }

            }

        }
        else{
           print("error")
        }
    }
}

And also change this

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
  }

To

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return options.count 
 }

edited Aug 21, 2015 at 1:28

answered Aug 21, 2015 at 1:21

Lamour

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4 Comments

shaydawg Over a year ago

I'm querying my database (using Parse), for them using a synchronous query. I have checked and the options are loading fine. After the query, I'm doing tableView.reloadData()

shaydawg Over a year ago

i do not think parse code is the issue, as the query is populating the options array. i am printing that array and seeing that it is populated. after i query parse and the array is filled, i do tableView.reloadData() so the issue has to be something else

Lamour Over a year ago

ok read the last part of my edit you have mixed up the row method with the section method

shaydawg Over a year ago

good call on the changing numberofrowsinsection thing. that was a typo on my part. but the issue still persists :/

SentientBacon · Accepted Answer · 2015-08-21 01:32:03Z

0

I noticed that you (unconventionally) use each element in options as i row in its own section. But, when you set the label, you base it on the row number, which will alway be zero. What you want is: cell.textLabel?.text = options[indexPath.section]

As for the table being blank, I would think that either

Your first element is nothing
The array is empty
You are not setting up the sections properly

answered Aug 21, 2015 at 1:32

SentientBacon

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