From 1dcd5af85eb19e1a660b23eaea715fdd085c2029 Mon Sep 17 00:00:00 2001
From: CypherPoet <CypherPoet@gmail.com>
Date: Wed, 20 Feb 2019 19:01:43 -0500
Subject: [PATCH] Override `traitCollectionDidChange` and use adaptive UI.

---
 .../Multibrowser/HomeViewController.swift         | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/31-ipad-multitasking/Multibrowser/Multibrowser/HomeViewController.swift b/31-ipad-multitasking/Multibrowser/Multibrowser/HomeViewController.swift
index 1039686..9a60685 100644
--- a/31-ipad-multitasking/Multibrowser/Multibrowser/HomeViewController.swift
+++ b/31-ipad-multitasking/Multibrowser/Multibrowser/HomeViewController.swift
@@ -76,6 +76,21 @@ class HomeViewController: UIViewController {
         }
     }
     
+    /**
+     - When we have a regular horizontal size class, we'll use horizontal stacking
+     - When we have a compact horizontal size class, we'll use vertical stacking
+     */
+    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
+        guard let horizontalSizeClasss = previousTraitCollection?.horizontalSizeClass else { return }
+        
+        switch horizontalSizeClasss {
+        case .regular, .unspecified:
+            stackView.axis = .horizontal
+        case .compact:
+            stackView.axis = .vertical
+        }
+    }
+    
     
     @IBAction func addWebView(_ sender: Any) {
         let webView = WKWebView()