UIActivityIndicator is not moving up when scrolled in tableview - ios

Question

I have a UITableviewcontroller and a activity indicator added to it.
When ever my table scroll, the indicator also moves up and goes out of bounds. Instead I want to display indicator even if the table scrolls
I checked this post: UIActivityIndicator scrolls with tableView which says I need to use UIViewcontroller instead of Tableviewcontroller.
Since I have many tableviewcontrollers added in application, isnt it possible to scroll indicator along with tableview.
My UIActivityIndicator is helper class across entire application where I control to display and remove spinner
extension UIViewController {
class func displaySpinner(onView : UIView) -> UIView {
let spinnerView = UIView.init(frame: onView.frame)
spinnerView.backgroundColor = UIColor.init(red: 0.5, green: 0.5, blue: 0.5, alpha: 0.5)
let ai = UIActivityIndicatorView.init(activityIndicatorStyle: .whiteLarge)
ai.startAnimating()
ai.center = spinnerView.center
DispatchQueue.main.async {
spinnerView.addSubview(ai)
onView.addSubview(spinnerView)
}
return spinnerView
}
class func removeSpinner(spinner :UIView) {
DispatchQueue.main.async {
spinner.removeFromSuperview()
}
}
}

Answer 1

You can do it if it's not an extension say the code is inside the tableController and
let indicator = UIActivityIndicator()
then use
func scrollViewDidScroll(_ scrollView: UIScrollView) {
// change frame of indicator by scrollview.contentOffset.y
}
You can also extend
class MyTableConWithIndicator:UITableViewController {
let indicator = UIActivityIndicator()
func scrollViewDidScroll(_ scrollView: UIScrollView) {
// change y'frame of indicator by scrollview.contentOffset.y
}
func addIndicator() {}
func removeIndicator() ()
}
Then extend from it in every tableController
class MyTable:MyTableConWithIndicator {}