How can I animate the progressBar in a custom prototype cell? - ios

Question

I'm trying to have the following animation in my custom UITableViewCell:
When a user checks off a task, the progressBar should go from 0.0 to 1.0 in 5 seconds
What I've tried
Doing the animation in the delegate method in the TableVC:
let cell = tableView.cellForRow(at: IndexPath(item: indexSection!, section: indexRow!)) as? TaskCell
cell?.progressBar.setProgress(1.0, animated: true)
This doesn't work because it seems like the cell doesn't exist (print(cell!) gives a fatal error)
Doing the animation in TaskCell.swift
#IBAction func checkBoxAction(_ sender: Any) {
if items![indexRow!].checked {
delegate?.changeButton(state: false, indexSection: indexSection!, indexRow: indexRow!, itemID: itemID)
UIView.self.animate(withDuration: 1.0) {
self.progressBar.setProgress(0.0, animated: true)
}
} else {
delegate?.changeButton(state: true, indexSection: indexSection!, indexRow: indexRow!, itemID: itemID)
UITableViewCell.animate(withDuration: 5.0) {
self.progressBar.setProgress(1.0, animated: true)
}
}
}
This does set the progress bar, but it doesn't animate it. The progress bar abruptly changes. This is what happens
Could anyone shine a light on what I'm doing wrong? Am I calling the animation function incorrectly or am I doing it in the wrong place?
Thanks,
Matt

Answer 1

I have just created a simplified example and for me the following code works:
CustomTableViewCell
class CustomTableViewCell: UITableViewCell
#IBOutlet weak var progressView: UIProgressView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
#IBAction func startButtonDidTap(_ sender: UIButton) {
UIView.animate(withDuration: 2) {
self.progressView.setProgress(0.5, animated: true)
}
}
}
ViewController
class ViewController: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "reuseID", for: indexPath) as? CustomTableViewCell else { return UITableViewCell() }
return cell
}
}
Of course you need a proper storyboard configuration in order to run my code...