How to check for `nil` in while loop condition in Swift?

Question

How to check for nil in while loop in Swift? I\'m getting error on this:

var count: UInt = 0
var view: UIView = self
while view.superview != nil { /         


        

Answer 1

The syntax of while allows for optional binding. Use:

var view: UIView = self
while let sv = view.superview {
  count += 1
  view = sv
}

[Thanks to @ben-leggiero for noting that view need not be Optional (as in the question itself) and for noting Swift 3 incompatibilities]