Adding label programmatically in UITableViewCell? - ios

Question

I'm having a problem adding an extra label on some of my cells in the tableview. At the moment I determine the rowheight as follows:
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
let numberOfBusses = nearbyStops[indexPath.section].getDepartures()[indexPath.row]!.count
if (numberOfBusses > 2) {
return CGFloat((75/2) * numberOfBusses)
} else {
return 75
}
}
I try to do this to add the missing label, but nothing happens:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! BusDepartureTableViewCell
let numberOfBusses = nearbyStops[indexPath.section].getDepartures()[indexPath.row]!.count
if (numberOfBusses > 2) {
var label = UILabel(frame: CGRectMake(0, 0, 200, 21))
label.center = CGPointMake(160, 284)
label.textAlignment = NSTextAlignment.Center
label.text = "I'am a test label"
label.textColor = UIColor.redColor()
cell.foregroundView.addSubview(label)
}
.........
What am I doing wrong?
UPDATE:
I've taken a picture of my current achievements and I've gotten the cell to expand, however, as you can see, there's now room for two other labels, but how do I add them?

Answer 1

Cells get re"used" - that means to save memory iOS uses your UI-Elements only as an placeholder, and sets your values in
cellForRowAtIndexPath
In that case, its much more memory efficient to create 2 (or more) different cell Layouts in Storyboard, and give every cell an different identifier.
For example:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let item = yourPopulatingArray[indexPath.row] as Item
var cellIdentifier = "cellLayout1"
if item.anyPropertyToCheckforLayout {
cellIdentifier = "cellLayout2"
}
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! BusDepartureTableViewCell