Swift TableViewCell empty when cell has values - ios

Question

I have a custom cell with some simple labels and a UIImage. Everything appears to be set correctly, and stepping through the debugger shows that everything is getting a value and even using the print in the debugger shows that the labels have text. However my table view is still empty when executed. I have been looking at this for too long and cannot figure out the problem.
Here is the cell code
class CurrentFileCell: UITableViewCell {
#IBOutlet weak var nameLabel: UILabel!
#IBOutlet weak var statusImage: UIImageView!
#IBOutlet weak var dateLabel: UILabel!
var currentContent: AircraftContent! {
didSet{
setStyles(Constants.appStyleSetting)
self.nameLabel.text = currentContent.contentName
self.dateLabel.text = currentContent.contentStatus
self.statusImage.image = UIImage(named: "color_label_circle_green")
}
}
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
private func setStyles(settings: StyleSettings) {
let tableFont = UIFont(name: settings.bodyFont, size: CGFloat(settings.tableFontSize))
nameLabel.font = tableFont
dateLabel.font = tableFont
// Text color
let tableFontColor = settings.tableFontColor
nameLabel.textColor = tableFontColor
dateLabel.textColor = tableFontColor
}
Here is the ViewController code with a tableview inside.
class CurrentFilesViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
var content: AircraftContent?
#IBOutlet weak var currentFiles: UILabel!
#IBOutlet weak var downloadingLabel: UILabel!
#IBOutlet weak var readyLabel: UILabel!
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.delegate = self
self.tableView.dataSource = self
self.content = loadContent()
setStyles(Constants.appStyleSetting)
//self.tableView.reloadData()
// Do any additional setup after loading the view.
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("CurrentFileCell", forIndexPath: indexPath) as? CurrentFileCell
cell?.currentContent = content
return cell!
}
func loadContent() -> AircraftContent {
return (NSKeyedUnarchiver.unarchiveObjectWithFile(AircraftContent.ArchiveURL.path!) as? AircraftContent)!
}
private func setStyles(settings: StyleSettings) {
let titleFont = UIFont(name: settings.bodyFont, size: CGFloat(settings.titleFontSize))
let key = UIFont(name: settings.bodyFont, size: CGFloat(settings.tableFontSize))
currentFiles.font = titleFont
downloadingLabel.font = key
readyLabel.font = key
// Text color
let titleFontColor = settings.titleFontColor
currentFiles.textColor = titleFontColor
downloadingLabel.textColor = titleFontColor
readyLabel.textColor = titleFontColor
}
Here are some images showing the debug location where the cell is not empty, and also printing out the label which has a value, but isn't being shown during simulation.
http://imgur.com/a/dBkpe
This is an image showing the prototype cell. The cell has the correct class set as well as the identifier.
http://imgur.com/PKtFTeQ
Lastly another image showing that the prototype cell is linked to the labels within the CurrentFileCell.
http://imgur.com/nW0QUjM
Any help at all with this would be appreciated. I have tried recreating everything but continue to be stumped as it seems like everything is how it should be.

Answer 1

You have to implement the 'heightForRowAtIndexPath' method for the table view
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
let height:CGFloat = 75
return height
}

Answer 2

You may consider registering the custom class as it does not appear that you did. You can do that by using the following code in the viewDidLoad of your View Controller.
tableView.registerClass(CurrentFileCell.self, forCellReuseIdentifier: "cell")
If you are using an external nib you will want to use registerNib instead like so:
tableView.registerNib(UINib(name:"ReplaceWithYourNibName", bundle: nil), forCellReuseIdentifier: "ReuseIdentifier")
Of course, replace ReplaceWithYourNibName and ReuseIdentifier with the appropriate values. In addition, if your nib is in a different bundle specify that instead of nil (nil defaults to the main bundle).
However, do not use both registerClass and registerNib as whichever one you call last will be used and they were designed to be mutually exclusive. Whenever you make a custom UITableViewCell you must use either of the two for it to work unless you have set it explicitly in the storyboard.
Also, you could instead, use prototype cells to define your custom cell, which would, I believe, automatically register the cell. But only if you did not use prototype cells make sure to use registerClass or registerNib.
Good luck! Hope this helps!

Answer 3

If your cell is a static cell, then you need to comment out these methods in UITableViewDataSource:
/* 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
} */

Answer 4

I had the same issue.
Data has values and cell rows are showing empty.
I figured it by adding
contentView.addSubview(titleLabel)
where cell values are being set.