What is the best way to check if a UIAlertController is already presenting?

Question

I have a tableview which, when loaded, each cell could possibly return an NSError, which I have chosen to display in a UIAlertController. Problem is I get this error in the

Answer 1

For latest Swift language you can use following:

var alert = presentedViewController

if alert != nil && (alert is UIAlertController) {
    // YES UIAlertController is already presented*
} else {
    // UIAlertController is not presented OR visible.
}