IOS 8 Dynamic Self Sizing UITableViewCell with UILabel

Question

IOS 8 Dynamic Self Sizing UITableViewCell with UILabel

I looked through all the questions regarding a similar problem, and I still have this problem no matter what I do. I am on iOS 8.3.

You can find the full code at: https://github.com/DanielRakh/CellHeightTest.git

I have a cell that dynamically resizes based on the contents of a UILabel, which ranges from single to multi-line text. Everything seems fine at first, but when I start to scroll quickly and quickly switch directions

I get a warning in the debugger:

2015-03-10 02:02:00.630 CellHeight[21115:3711275] Warning once only:      

Detected a case where constraints ambiguously suggest a height of zero
for a tableview cell content view. We're considering the collapse
unintentional and using standard height instead.

This is how it looks in the simulator. I noted the discrepancies in red:

enter image description here

IB, UILabel, (11), (11), (8) (8) 45pts:

. , , IBOutlet :

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
    
    @IBOutlet weak var tableView: UITableView!
    
    var arr = [String]()
    

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        for _ in 1...10 {
            
            arr.append("This is an amount of text.")
            arr.append("This is an even larget amount of text. This should move to other lines of the label and mace the cell grow.")
            arr.append("This is an even larger amount of text. That should move to other lines of the label and make the cell grow. Crossing fingers. This is an even larger amount of text. That should move to other lines of the label and make the cell grow. Crossing fingers.")
        }
        
        tableView.rowHeight = UITableViewAutomaticDimension
        tableView.estimatedRowHeight = 45.0

    }
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        tableView.reloadData()
    }
    
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return arr.count
    }
    
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! TstTableViewCell
        cell.tstLabel.text = arr[indexPath.row]
        return cell
    }

}