ViewController descendants

gistfile1.txt

extension UIViewController {
   /**
    * Traverses the entire VC hirearchy downwards and collects VC'w that are of speccific PARAM: type
    * - Fixme: ⚠️️ this can be written more elegantly with flatMap
    * ## Example:
    * let vc: CustomVC? = UIApplication.shared.delegate?.window?.rootViewController?.descendants().first
    */
   func descendants<T>(type: T.Type? = nil) -> [T] {
       var childrenOfType: [T] = []
       self.children.forEach {
           if let child: T = ($0 as? T) {
               childrenOfType.append(child)
           }
           if !$0.children.isEmpty {
               childrenOfType += $0.descendants(type: type)
           }
       }
       return childrenOfType
   }
}

Must be "return childrenOfType" instead "return subViewsOfType"

Fixed. Thanks 👍

@eonist
i find the this issues on my case

Put let vc: UIViewConteoller in front or cast AS VC