some updates

packages/webview_flutter/webview_flutter_wkwebview/example/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>11.0</string>
 </dict>
 </plist>

packages/webview_flutter/webview_flutter_wkwebview/example/ios/Podfile

@@ -1,5 +1,5 @@
 # Uncomment this line to define a global platform for your project
-# platform :ios, '9.0'
+# platform :ios, '11.0'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'

packages/webview_flutter/webview_flutter_wkwebview/example/ios/Runner.xcodeproj/project.pbxproj

@@ -614,7 +614,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -664,7 +664,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = "1,2";

packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFInstanceManagerTests.m

@@ -3,7 +3,9 @@
 // found in the LICENSE file.
 
 #import <XCTest/XCTest.h>
+
 @import webview_flutter_wkwebview;
+@import webview_flutter_wkwebview.Test;
 
 @interface FWFInstanceManagerTests : XCTestCase
 @end

packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFUIViewHostApiTests.m

@@ -45,4 +45,5 @@ - (void)testSetOpaque {
   OCMVerify([mockUIView setOpaque:YES]);
   XCTAssertNil(error);
 }
+
 @end

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFInstanceManager.h

@@ -82,21 +82,6 @@ typedef void (^FWFOnDeallocCallback)(long identifier);
  */
 - (long)identifierForInstance:(nonnull NSObject *)instance
     identifierWillBePassedToFlutter:(BOOL)willBePassed;
-
-/**
- * The number of instances stored as a strong reference.
- *
- * Added for debugging purposes.
- */
-- (NSUInteger)strongInstanceCount;
-
-/**
- * The number of instances stored as a weak reference.
- *
- * Added for debugging purposes. NSMapTables that store keys or objects as weak reference will be
- * reclaimed nondeterministically.
- */
-- (NSUInteger)weakInstanceCount;
 @end
 
 NS_ASSUME_NONNULL_END

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFInstanceManager.m

@@ -3,6 +3,9 @@
 // found in the LICENSE file.
 
 #import "FWFInstanceManager.h"
+#import "FWFInstanceManager_Test.h"
+
+#import <objc/runtime.h>
 
 // Attaches to an object to receive a callback when the object is deallocated.
 @interface FWFFinalizer : NSObject
@@ -51,7 +54,7 @@ @interface FWFInstanceManager ()
 
 @implementation FWFInstanceManager
 // Identifiers are locked to a specific range to avoid collisions with objects
-// created simultaneously by Dart.
+// created simultaneously from Dart.
 // Host uses identifiers >= 2^16 and Dart is expected to use values n where,
 // 0 <= n < 2^16.
 long const FWFMinHostCreatedIdentifier = 65536;

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFInstanceManager_Test.h

@@ -0,0 +1,26 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import <webview_flutter_wkwebview/FWFInstanceManager.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FWFInstanceManager ()
+/**
+ * The number of instances stored as a strong reference.
+ *
+ * Added for debugging purposes.
+ */
+- (NSUInteger)strongInstanceCount;
+
+/**
+ * The number of instances stored as a weak reference.
+ *
+ * Added for debugging purposes. NSMapTables that store keys or objects as weak reference will be
+ * reclaimed nondeterministically.
+ */
+- (NSUInteger)weakInstanceCount;
+@end
+
+NS_ASSUME_NONNULL_END

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.m

@@ -6,6 +6,7 @@
 #import "FWFWebViewConfigurationHostApi.h"
 
 @interface FWFNavigationDelegateFlutterApiImpl ()
+// This reference must be weak to prevent a circular reference with the objects it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
@@ -60,6 +61,7 @@ - (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigat
 
 @interface FWFNavigationDelegateHostApiImpl ()
 @property(weak) id<FlutterBinaryMessenger> binaryMessenger;
+// This reference must be weak to prevent a circular reference with the objects it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.m

@@ -6,6 +6,7 @@
 #import "FWFDataConverters.h"
 
 @interface FWFObjectFlutterApi ()
+// This reference must be weak to prevent a circular reference with the objects it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
@@ -33,6 +34,7 @@ - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessen
 @end
 
 @interface FWFObjectHostApiImpl ()
+// This reference must be weak to prevent a circular reference with the objects it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.m

@@ -30,5 +30,4 @@ - (void)createWithIdentifier:(nonnull NSNumber *)identifier
   FWFUIDelegate *uIDelegate = [[FWFUIDelegate alloc] init];
   [self.instanceManager addDartCreatedInstance:uIDelegate withIdentifier:identifier.longValue];
 }
-
 @end

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FlutterWebView.modulemap

@@ -7,5 +7,6 @@ framework module webview_flutter_wkwebview {
   explicit module Test {
     header "FlutterWebView_Test.h"
     header "FLTCookieManager_Test.h"
+    header "FWFInstanceManager_Test.h"
   }
 }

packages/webview_flutter/webview_flutter_wkwebview/lib/src/common/instance_manager.dart

@@ -193,9 +193,11 @@ class InstanceManager {
   }
 
   int _nextUniqueIdentifier() {
-    while (containsIdentifier(_nextIdentifier)) {
+    late int identifier;
+    do {
+      identifier = _nextIdentifier;
       _nextIdentifier = (_nextIdentifier + 1) % _maxDartCreatedIdentifier;
-    }
-    return _nextIdentifier;
+    } while (containsIdentifier(identifier));
+    return identifier;
   }
 }

packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit_api_impls.dart

@@ -6,7 +6,6 @@ import 'dart:async';
 import 'dart:math';
 
 import 'package:flutter/painting.dart' show Color;
-import 'package:flutter/services.dart';
 import 'package:webview_flutter_wkwebview/src/foundation/foundation.dart';
 
 import '../common/instance_manager.dart';

packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit_webview_widget.dart

@@ -18,14 +18,14 @@ import 'web_kit/web_kit.dart';
 class WebKitWebViewWidget extends StatefulWidget {
   /// Constructs a [WebKitWebViewWidget].
   const WebKitWebViewWidget({
-    Key? key,
+    super.key,
     required this.creationParams,
     required this.callbacksHandler,
     required this.javascriptChannelRegistry,
     required this.onBuildWidget,
     this.configuration,
     @visibleForTesting this.webViewProxy = const WebViewWidgetProxy(),
-  }) : super(key: key);
+  });
 
   /// The initial parameters used to setup the WebView.
   final CreationParams creationParams;