From eb56ca3b0d7dec26603f45b9d9e63fc186e27eaa Mon Sep 17 00:00:00 2001
From: Giles Payne <gilespayne@gmail.com>
Date: Wed, 6 Oct 2021 21:06:30 +0900
Subject: [PATCH] Fix build on older Xcode versions

---
 modules/imgcodecs/misc/objc/ios/Mat+QuickLook.mm    | 4 ++++
 modules/imgcodecs/misc/objc/macosx/Mat+QuickLook.mm | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/modules/imgcodecs/misc/objc/ios/Mat+QuickLook.mm b/modules/imgcodecs/misc/objc/ios/Mat+QuickLook.mm
index 7bfee07eb1..84cf25879b 100644
--- a/modules/imgcodecs/misc/objc/ios/Mat+QuickLook.mm
+++ b/modules/imgcodecs/misc/objc/ios/Mat+QuickLook.mm
@@ -22,11 +22,15 @@ static UIFont* getBodoni72() {
 }
 
 static UIFont* getAnySerif() {
+#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
     if (@available(iOS 13.0, *)) {
         return [UIFont fontWithDescriptor:[[UIFontDescriptor preferredFontDescriptorWithTextStyle:UIFontTextStyleBody] fontDescriptorWithDesign:UIFontDescriptorSystemDesignSerif] size:SIZE];
     } else {
         return nil;
     }
+#else
+    return nil;
+#endif
 }
 
 static UIFont* getSystemFont() {
diff --git a/modules/imgcodecs/misc/objc/macosx/Mat+QuickLook.mm b/modules/imgcodecs/misc/objc/macosx/Mat+QuickLook.mm
index 6775f81780..bdc5eda811 100644
--- a/modules/imgcodecs/misc/objc/macosx/Mat+QuickLook.mm
+++ b/modules/imgcodecs/misc/objc/macosx/Mat+QuickLook.mm
@@ -22,11 +22,15 @@ static NSFont* getBodoni72() {
 }
 
 static NSFont* getAnySerif() {
+#if defined(__MAC_OS_X_VERSION_MAX_ALLOWED) && __MAC_OS_X_VERSION_MAX_ALLOWED >= 110000
     if (@available(macOS 11.0, *)) {
         return [NSFont fontWithDescriptor:[[NSFontDescriptor preferredFontDescriptorForTextStyle:NSFontTextStyleBody options:@{}] fontDescriptorWithDesign:NSFontDescriptorSystemDesignSerif] size:SIZE];
     } else {
         return nil;
     }
+#else
+    return nil;
+#endif
 }
 
 static NSFont* getSystemFont() {
-- 
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