fix: Resolve SDK crash caused by UIPrintPanelViewController incorrectly casting to UISplitViewController (#6771)

* fix: Resolve SDK crash caused by UIPrintPanelViewController incorrectly casting to UISplitViewController

* update changelog

* Update changelog

---------

Co-authored-by: Itay Brenner <[email protected]>

Author: philprime

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixes
 
 - Remove unnecesary dependency on `SentryCppHelper` to Sentry (#6754) (#6761)
+- Resolve SDK crash caused by UIPrintPanelViewController incorrectly casting to UISplitViewController (#6771)
 
 ## 8.57.2
 

Sources/Swift/Helper/SentryApplicationExtensions.swift

@@ -136,8 +136,18 @@ extension SentryApplication {
                 return nil
             }
         }
+
         if let splitViewController = vc as? UISplitViewController {
-            if splitViewController.viewControllers.count > 0 {
+            // We encountered a case where the private class `UIPrintPanelViewController` overrides the `isKindOfClass:` method and wrongfully
+            // allows casting to `UISplitViewController`, while not actually being a subclass:
+            //
+            //   -[UIPrintPanelViewController viewControllers]: unrecognized selector sent to instance 0x124f45e00
+            //
+            // Check if the selector exists as a double-check mechanism
+            // See: https://github.com/getsentry/sentry-cocoa/issues/6725
+            if !splitViewController.responds(to: NSSelectorFromString("viewControllers")) {
+                SentrySDKLog.warning("Failed to get viewControllers from UISplitViewController. This is a known bug in iOS 26.1")
+            } else if splitViewController.viewControllers.count > 0 {
                 return splitViewController.viewControllers
             }
         }