dmytro-anokhin

extension UIResponder {

    /// The responder chain from the target responder (self)
    ///     to the `UIApplication` and the app delegate
    var responderChain: [UIResponder] {
        var responderChain: [UIResponder] = []
        var currentResponder: UIResponder? = self

        while currentResponder != nil {
            responderChain.append(currentResponder!)

dmytro-anokhin

extension UIWindow {
    /// Traverse the window's view hierarchy in the same way as the Debug View Hierarchy tool in Xcode.
    ///
    /// `traverseHierarchy` uses Depth First Search (DFS) to traverse the view hierarchy starting in the window. This way the method can traverse all sub-hierarchies in a correct order.
    ///
    /// - parameters:
    ///     - visitor: The closure executed for every view object in the hierarchy
    ///     - responder: The view object, `UIView`, `UIViewController`, or `UIWindow` instance.
    ///     - level: The depth level in the view hierarchy.
    func traverseHierarchy(_ visitor: (_ responder: UIResponder, _ level: Int) -> Void) {

dmytro-anokhin

extension UIWindow {

    /// Print the app's key window hierarchy.
    class func printKeyWindowHierarchy() {
        UIApplication.shared.keyWindow?.printHierarchy()
    }
    
    /// Prints the window's view hierarchy.
    func printHierarchy() {
        traverseHierarchy { responder, level in

designatednerd

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>beers_on_wall</key>
	<dict>
		<key>NSStringLocalizedFormatKey</key>
		<string>%#@beers@</string>
		<key>beers</key>
		<dict>