Blinking table view cell - swift

Question

After adding a new set of data to a table view, i'd like to have the cell that displays the new data blink green for 5 seconds. I used an extension to UIView. I call the extension within "cellForRowAtIndexPath" but it turns the cell green permanently and it never turns back to default background color again. Heres the extension i am using:
extension UIView {
func blink(duration: TimeInterval = 0.5, delay: TimeInterval = 0.0, alpha: CGFloat = 0.0) {
UIView.animate(withDuration: duration, delay: delay, options: [.curveEaseInOut, .repeat, .autoreverse], animations: {
self.backgroundColor = .systemGreen
})
}
}
self.blink() is called within "cellForRowAtIndexPath"
I have no idea why the animation isnt working, does anyone have a solution?

Answer 1

Heres a working answer i now managed to find for my problem.
First the blinking extension:
Using .repeat .autoreverse i wasnt able to stop the animation at the exact time that it turned back to default color which didnt look nice. So I decided to write the animation myself and let the cell blink 3 times this way:
extension UIView {
func blink(duration: TimeInterval = 1.4, repetitions: Int = 3) {
var remainingReps = repetitions
UIView.animate(withDuration: duration, animations: {
self.backgroundColor = Colors.primaryAlpha
}) { (error) in
UIView.animate(withDuration: duration, animations: {
self.backgroundColor = .systemBackground
}) { (error) in
remainingReps -= 1
if remainingReps > 0 {
self.blink(duration: duration, repetitions: remainingReps)
}
}
}
}
}
You can choose yourself how many times you want the cell to blink by its "repetitions" parameter.
Now in your tableview add following code for tableView willDisplay cell:
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
let dataSet = myData[indexPath.row]
let myCell = cell as! YourCellType
myCell.checkIfShouldBlink(data: dataSet)
}
}
Finally within your TableViewCell Class:
func checkIfShouldBlink(data: MyDataObject){
//Here you can implement any kind of logic to have the cell blink depending
//on your dataSet. In my case for exmaple, if the timestamp of the data is
//less than 5 secs old (new Data) i have the cell blink.
if data.whatEverLogicYouWantToPutHere{
self.blink()
}
}