fix(ios): compile native capture plugin on Flutter 3.35

Look up registrar.viewController at runtime and fall back to the key
window so hosted 0.8.x still builds on Flutter 3.35. Bump tugboat and
tugboat_dio to 0.8.16.

Author: Chinmay-KB

docs/README.md

@@ -58,7 +58,7 @@ gates, canaries) are not listed below.
 
 ## Current compatibility
 
-- package version: `0.8.15` (`0.8.x` patch; Android plugin uses Maven Central
+- package version: `0.8.16` (`0.8.x` patch; Android plugin uses Maven Central
   `capture-runtime` `0.1.0`; iOS plugin uses CocoaPods `TugboatCaptureRuntime`
   `0.1.0` and requires iOS 15);
 - native runtime: `capture-runtime` `0.1.0` on Maven Central;

docs/releases/compatibility.md

@@ -2,6 +2,7 @@
 
 | Adapter | Adapter version | Native runtime |
 | --- | --- | --- |
+| Flutter `tugboat` | 0.8.16 | Same hosted runtimes as 0.8.15. iOS plugin looks up `registrar.viewController` at runtime so Flutter 3.35 hosts compile. |
 | Flutter `tugboat` | 0.8.15 | Android `com.gettugboat.sdk:capture-runtime:0.1.0` from Maven Central. Apple `TugboatCaptureRuntime` `0.1.0` from CocoaPods trunk. Plugin iOS floor 15. |
 | Flutter `tugboat` | 0.8.14 | Android `com.gettugboat.sdk:capture-runtime:0.1.0` from Maven Central. Apple `TugboatCaptureRuntime` 0.1.x compiled from monorepo sources (unpublished CocoaPod is not required). Plugin iOS floor 12; native capture still reports unsupported below iOS 15. |
 | Flutter `tugboat` | 0.8.13 | Android `capture-runtime` 0.1.x compiled from monorepo sources (hosted Maven is not required). Apple `TugboatCaptureRuntime` 0.1.x compiled from monorepo sources (unpublished CocoaPod is not required). Plugin iOS floor 12; native capture still reports unsupported below iOS 15. |
@@ -10,8 +11,9 @@
 | Apple `TugboatCaptureRuntime` | 0.1.0 | CocoaPods trunk / SwiftPM git tag; iOS 15 live Flutter-layer CPU path |
 | `@tugboat/react-native` | — | not started |
 
-Flutter `0.8.15` consumes Android `capture-runtime` `0.1.0` from Maven Central
-and Apple `TugboatCaptureRuntime` `0.1.0` from CocoaPods. Native capture stays
+Flutter `0.8.16` compiles on Flutter 3.35 and consumes Android
+`capture-runtime` `0.1.0` from Maven Central and Apple
+`TugboatCaptureRuntime` `0.1.0` from CocoaPods. Native capture stays
 opt-in. The first native-default adapter is still planned as Flutter `0.9.0`.
 
 CI requires this table to change whenever Flutter adapter source or the

sdks/flutter/packages/tugboat/CHANGELOG.md

@@ -1,3 +1,11 @@
+## 0.8.16
+
+### Fixed
+
+- The iOS plugin compiles on Flutter 3.35. `registrar.viewController` is a
+  Flutter 3.38 API, so look it up at runtime and fall back to the key window
+  when resolving the live Flutter view for opt-in native CPU capture.
+
 ## 0.8.15
 
 The iOS plugin depends on CocoaPods `TugboatCaptureRuntime` `0.1.0` and

sdks/flutter/packages/tugboat/README.md

@@ -5,10 +5,18 @@ checkpoints around meaningful interactions, compact structural anchors, route
 transitions, scrolling evidence, and optional viewport semantic maps. Capture
 can be sent to the local exploration WebSocket, the HTTP collector, or both.
 
-The current package version is `0.8.15`. Session JSON writers and readers use
+The current package version is `0.8.16`. Session JSON writers and readers use
 schema version `10` only. Structural fingerprints use fingerprint schema
 version `6`.
 
+## 0.8.16
+
+The iOS plugin compiles on Flutter 3.35. Native CPU capture still loads
+CocoaPods `TugboatCaptureRuntime` `0.1.0` and Maven Central
+`com.gettugboat.sdk:capture-runtime:0.1.0`. Native capture stays opt-in
+(`nativeCpuExperimental`). Keep
+`TugboatScreenshotCaptureBackend.flutterRepaintBoundary` in production.
+
 ## 0.8.15
 
 iOS native CPU capture loads CocoaPods `TugboatCaptureRuntime` `0.1.0` and
@@ -123,7 +131,7 @@ events.
 
 ```yaml
 dependencies:
-  tugboat: ^0.8.15
+  tugboat: ^0.8.16
 ```
 
 Then import the public barrel:
@@ -139,8 +147,8 @@ Install from pub.dev; a GitHub checkout is not required.
 
 ```yaml
 dependencies:
-  tugboat: ^0.8.15
-  tugboat_dio: ^0.8.15
+  tugboat: ^0.8.16
+  tugboat_dio: ^0.8.16
 ```
 
 See the [`tugboat_dio`](https://pub.dev/packages/tugboat_dio) package.

sdks/flutter/packages/tugboat/android/build.gradle

@@ -1,5 +1,5 @@
 group = "com.tugboat.flutter"
-version = "0.8.15"
+version = "0.8.16"
 
 buildscript {
     ext.kotlin_version = "2.2.20"

sdks/flutter/packages/tugboat/example/pubspec.yaml

@@ -32,7 +32,7 @@ resolution: workspace
 dependencies:
   flutter:
     sdk: flutter
-  tugboat: ^0.8.15
+  tugboat: ^0.8.16
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.

sdks/flutter/packages/tugboat/ios/Classes/TugboatPlugin.swift

@@ -52,12 +52,36 @@ public class TugboatPlugin: NSObject, FlutterPlugin, NativeCaptureHostApi {
   }
 
   private func flutterView() -> UIView? {
-    guard let controller = registrar?.viewController else {
+    guard let controller = hostViewController() else {
       return nil
     }
     return findFlutterView(controller.view) ?? controller.view
   }
 
+  /// Flutter 3.38+ exposes `registrar.viewController`. The package floor is
+  /// Flutter 3.35, which does not declare that property, so look it up at
+  /// runtime and fall back to the key window.
+  private func hostViewController() -> UIViewController? {
+    if let registrar {
+      let selector = NSSelectorFromString("viewController")
+      if registrar.responds(to: selector),
+         let controller = registrar.perform(selector)?.takeUnretainedValue()
+           as? UIViewController
+      {
+        return controller
+      }
+    }
+    return keyWindowRootViewController()
+  }
+
+  private func keyWindowRootViewController() -> UIViewController? {
+    let windows = UIApplication.shared.connectedScenes
+      .compactMap { $0 as? UIWindowScene }
+      .flatMap(\.windows)
+    let keyWindow = windows.first(where: \.isKeyWindow) ?? windows.first
+    return keyWindow?.rootViewController
+  }
+
   private func findFlutterView(_ view: UIView) -> UIView? {
     let name = NSStringFromClass(type(of: view))
     if name == "FlutterView" || name.hasSuffix(".FlutterView") {

sdks/flutter/packages/tugboat/ios/tugboat.podspec

@@ -4,7 +4,7 @@
 #
 Pod::Spec.new do |s|
   s.name             = 'tugboat'
-  s.version          = '0.8.15'
+  s.version          = '0.8.16'
   s.summary          = 'Screenshot-based session replay with compact interaction anchors for Tugboat.'
   s.description      = <<-DESC
     Flutter adapter for Tugboat session replay. Native CPU capture is experimental

sdks/flutter/packages/tugboat/lib/src/sdk_version.dart

@@ -1,3 +1,3 @@
 // Keep this in sync with this package's pubspec.yaml. The SDK version test
 // reads pubspec.yaml directly so release bumps fail fast if this drifts.
-const tugboatSdkVersion = '0.8.15';
+const tugboatSdkVersion = '0.8.16';

sdks/flutter/packages/tugboat/pubspec.yaml

@@ -1,7 +1,7 @@
 name: tugboat
 description: >-
   Screenshot-based session replay with compact interaction anchors for Tugboat.
-version: 0.8.15
+version: 0.8.16
 repository: https://github.com/blendto/tugboat-flutter
 issue_tracker: https://github.com/blendto/tugboat-flutter/issues
 homepage: https://github.com/blendto/tugboat-flutter