[TwoLineTitleViewDemoController] Fix demo crash for iOS 26.* and macCatalyst 26.* (#2240)

* Fix up demo inputs

* Add macCatalyst as well

* Add XCUITests

* PR Comments and Vision build

* [TEST] Bump xcode version to see if test flakiness goes away

Author: nodes11

Demos/FluentUIDemo_iOS/FluentUI.Demo.xcodeproj/project.pbxproj

@@ -99,6 +99,7 @@
 		92E977B726C7144F008E10A8 /* UIResponder+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 92E977B526C713F3008E10A8 /* UIResponder+Extensions.swift */; };
 		92E977B826C7144F008E10A8 /* DemoControllerScrollView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 92E977B426C713F3008E10A8 /* DemoControllerScrollView.swift */; };
 		92EFD3E42BDA28F100DB35F2 /* TooltipDemoController_SwiftUI.swift in Sources */ = {isa = PBXBuildFile; fileRef = 92EFD3E32BDA28F100DB35F2 /* TooltipDemoController_SwiftUI.swift */; };
+		94F99E762F22D39800E4C4B0 /* TwoLineTitleViewTest.swift in Sources */ = {isa = PBXBuildFile; fileRef = 94F99E752F22D39800E4C4B0 /* TwoLineTitleViewTest.swift */; };
 		A589F856211BA71000471C23 /* LabelDemoController.swift in Sources */ = {isa = PBXBuildFile; fileRef = A589F855211BA71000471C23 /* LabelDemoController.swift */; };
 		A591A3F420F429EB001ED23B /* Demos.swift in Sources */ = {isa = PBXBuildFile; fileRef = A591A3F320F429EB001ED23B /* Demos.swift */; };
 		A5CEC21020E436F10016922A /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5CEC20F20E436F10016922A /* AppDelegate.swift */; };
@@ -240,6 +241,7 @@
 		92E977B426C713F3008E10A8 /* DemoControllerScrollView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DemoControllerScrollView.swift; sourceTree = "<group>"; };
 		92E977B526C713F3008E10A8 /* UIResponder+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIResponder+Extensions.swift"; sourceTree = "<group>"; };
 		92EFD3E32BDA28F100DB35F2 /* TooltipDemoController_SwiftUI.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = TooltipDemoController_SwiftUI.swift; sourceTree = "<group>"; };
+		94F99E752F22D39800E4C4B0 /* TwoLineTitleViewTest.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TwoLineTitleViewTest.swift; sourceTree = "<group>"; };
 		A589F855211BA71000471C23 /* LabelDemoController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LabelDemoController.swift; sourceTree = "<group>"; };
 		A591A3F320F429EB001ED23B /* Demos.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Demos.swift; sourceTree = "<group>"; };
 		A5961FA8218A61BB00E2A506 /* PopupMenuDemoController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PopupMenuDemoController.swift; sourceTree = "<group>"; };
@@ -405,6 +407,7 @@
 				3A83F90A2953BB2700EF6629 /* TableViewHeaderFooterViewTest.swift */,
 				EC0A83E3299ED3630010ED3E /* TextFieldTest.swift */,
 				3A83F90C2953BB3500EF6629 /* TooltipTest.swift */,
+				94F99E752F22D39800E4C4B0 /* TwoLineTitleViewTest.swift */,
 				3A83F90E2953BB4000EF6629 /* TypographyTokensTest.swift */,
 			);
 			path = FluentUIDemoTests;
@@ -797,6 +800,7 @@
 				3A83F8D52953B92D00EF6629 /* GlobalColorTokensTest.swift in Sources */,
 				3A83F8F32953BA9500EF6629 /* PersonaListViewTest.swift in Sources */,
 				3A83F8D32953B91900EF6629 /* CardNudgeTest.swift in Sources */,
+				94F99E762F22D39800E4C4B0 /* TwoLineTitleViewTest.swift in Sources */,
 				3AA92B69298DD958001C0464 /* AliasColorTokensTest.swift in Sources */,
 				3A83F90D2953BB3500EF6629 /* TooltipTest.swift in Sources */,
 				3A83F8D92953B94D00EF6629 /* DateTimePickerTest.swift in Sources */,

Demos/FluentUIDemo_iOS/FluentUI.Demo/Demos/TwoLineTitleViewDemoController.swift

@@ -107,7 +107,15 @@ class TwoLineTitleViewDemoController: DemoController {
         makeExampleNavigationItem {
             $0.title = "Centered Title"
             $0.fluentConfiguration.titleStyle = .system
+#if os(visionOS)
             $0.fluentConfiguration.subtitle = "Custom icon"
+#else
+            if #available(iOS 26.0, macCatalyst 26, *) {
+                $0.subtitle = "Custom icon"
+            } else {
+                $0.fluentConfiguration.subtitle = "Custom icon"
+            }
+#endif
             $0.fluentConfiguration.titleImage = UIImage(named: "ic_fluent_star_24_regular")
             $0.fluentConfiguration.customSubtitleTrailingImage = UIImage(named: "ic_fluent_star_16_regular")
             $0.fluentConfiguration.titleAccessory = .init(location: .subtitle, style: .custom)
@@ -116,7 +124,15 @@ class TwoLineTitleViewDemoController: DemoController {
         makeExampleNavigationItem {
             $0.title = "Leading Title"
             $0.fluentConfiguration.titleStyle = .leading
+            #if os(visionOS)
             $0.fluentConfiguration.subtitle = "Subtitle"
+            #else
+            if #available(iOS 26.0, macCatalyst 26, *) {
+                $0.subtitle = "Subtitle"
+            } else {
+                $0.fluentConfiguration.subtitle = "Subtitle"
+            }
+            #endif
             $0.fluentConfiguration.titleImage = UIImage(named: "ic_fluent_star_24_regular")
             $0.fluentConfiguration.customSubtitleTrailingImage = UIImage(named: "ic_fluent_star_16_regular")
             $0.fluentConfiguration.titleAccessory = .init(location: .title, style: .downArrow)

Demos/FluentUIDemo_iOS/FluentUIDemoTests/TwoLineTitleViewTest.swift

@@ -0,0 +1,15 @@
+//
+//  Copyright (c) Microsoft Corporation. All rights reserved.
+//  Licensed under the MIT License.
+//
+
+import XCTest
+
+class TwoLineTitleViewTest: BaseTest {
+    override var controlName: String { "TwoLineTitleView" }
+
+    // launch test that ensures the demo app does not crash and is on the correct control page
+    func testLaunch() throws {
+        XCTAssert(app.navigationBars[controlName].exists)
+    }
+}

scripts/xcode_select_current_version.sh

@@ -3,7 +3,7 @@
 if [ -n "$XCODE_PATH_OVERRIDE" ]; then # If someone calls this with the XCODE_PATH_OVERRIDE variable set to a path to a developer dir, use it instead
     XCODE_PATH="$XCODE_PATH_OVERRIDE"
 else
-    XCODE_PATH='/Applications/Xcode_26.0.app/Contents/Developer'
+    XCODE_PATH='/Applications/Xcode_26.2.app/Contents/Developer'
 fi
 
 echo "Running command: sudo xcode-select --switch $XCODE_PATH"