From 094c0c40d8e398a565829ae6914569d6095d4ed3 Mon Sep 17 00:00:00 2001
From: Ivan Smolin <ivan.smolin@touchin.ru>
Date: Tue, 11 Jul 2023 16:30:34 +0300
Subject: [PATCH] build: prevent compile-time failure in application extensions

---
 .../Extensions/UIViewController+FixedTopOffet.swift   | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/TIUIElements/Sources/Helpers/Extensions/UIViewController+FixedTopOffet.swift b/TIUIElements/Sources/Helpers/Extensions/UIViewController+FixedTopOffet.swift
index a370590b..bf1c3de1 100644
--- a/TIUIElements/Sources/Helpers/Extensions/UIViewController+FixedTopOffet.swift
+++ b/TIUIElements/Sources/Helpers/Extensions/UIViewController+FixedTopOffet.swift
@@ -11,7 +11,16 @@ public extension UIViewController {
         if #available(iOS 13.0, *) {
             statusBarHeight = window?.windowScene?.statusBarManager?.statusBarFrame.height ?? 0
         } else {
-            statusBarHeight = UIApplication.shared.statusBarFrame.height
+            // prevent compile-time failure: 'shared' is unavailable in application extensions for iOS
+
+            let sharedSelector = Selector(("shared"))
+
+            if UIApplication.responds(to: sharedSelector),
+               let sharedApplication = UIApplication.perform(sharedSelector).takeRetainedValue() as? UIApplication {
+                statusBarHeight = sharedApplication.statusBarFrame.height
+            } else { // application extension, statusBarFrame is not applicable
+                statusBarHeight = .zero
+            }
         }
 
         let navigationBarHeight = navigationBar?.bounds.height ?? 0