UITableView programmatically in Swift Empty - ios

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?

Answer 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)
}

Answer 2

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

Answer 3

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
}

Answer 4

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