From e584e72965e14b779ca06985b4a80711ec080d3f Mon Sep 17 00:00:00 2001
From: Huan Lin <hellohuanlin@gmail.com>
Date: Tue, 9 May 2023 12:51:39 -0700
Subject: [PATCH 1/2] Avoid relying on internal class details

---
 .../darwin/ios/framework/Source/FlutterPlatformViewsTest.mm | 6 +++---
 .../ios/framework/Source/FlutterPlatformViews_Internal.mm   | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
index 97285cfcc78be..d4d45a466d64e 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
@@ -1215,7 +1215,7 @@ - (void)testApplyBackdropFilterAPIChangedNoGaussianBlurFilter {
       initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]];
   NSArray* subviews = editedUIVisualEffectView.subviews;
   for (UIView* view in subviews) {
-    if ([view isKindOfClass:NSClassFromString(@"_UIVisualEffectBackdropView")]) {
+    if ([NSStringFromClass([view class]) hasSuffix:@"BackdropView"]) {
       for (CIFilter* filter in view.layer.filters) {
         if ([[filter valueForKey:@"name"] isEqual:@"gaussianBlur"]) {
           [filter setValue:@"notGaussianBlur" forKey:@"name"];
@@ -1238,7 +1238,7 @@ - (void)testApplyBackdropFilterAPIChangedInvalidInputRadius {
       initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]];
   NSArray* subviews = editedUIVisualEffectView.subviews;
   for (UIView* view in subviews) {
-    if ([view isKindOfClass:NSClassFromString(@"_UIVisualEffectBackdropView")]) {
+    if ([NSStringFromClass([view class]) hasSuffix:@"BackdropView"]) {
       for (CIFilter* filter in view.layer.filters) {
         if ([[filter valueForKey:@"name"] isEqual:@"gaussianBlur"]) {
           [filter setValue:@"invalidInputRadius" forKey:@"inputRadius"];
@@ -2773,7 +2773,7 @@ - (BOOL)validateOneVisualEffectView:(UIView*)visualEffectView
                         inputRadius:(CGFloat)inputRadius {
   XCTAssertTrue(CGRectEqualToRect(visualEffectView.frame, frame));
   for (UIView* view in visualEffectView.subviews) {
-    if (![view isKindOfClass:NSClassFromString(@"_UIVisualEffectBackdropView")]) {
+    if (![NSStringFromClass([view class]) hasSuffix:@"BackdropView"]) {
       continue;
     }
     XCTAssertEqual(view.layer.filters.count, 1u);
diff --git a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm
index 981c2c32a9ea4..133ce5abd957f 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm
@@ -121,7 +121,7 @@ + (void)prepareOnce:(UIVisualEffectView*)visualEffectView {
   }
   for (NSUInteger i = 0; i < visualEffectView.subviews.count; i++) {
     UIView* view = visualEffectView.subviews[i];
-    if ([view isKindOfClass:NSClassFromString(@"_UIVisualEffectBackdropView")]) {
+    if ([NSStringFromClass([view class]) hasSuffix:@"BackdropView"]) {
       _indexOfBackdropView = i;
       for (NSObject* filter in view.layer.filters) {
         if ([[filter valueForKey:@"name"] isEqual:@"gaussianBlur"] &&

From b873ff818746cfa1b1940f844d1a980850d0192a Mon Sep 17 00:00:00 2001
From: Huan Lin <hellohuanlin@gmail.com>
Date: Tue, 9 May 2023 14:10:07 -0700
Subject: [PATCH 2/2] also fix visual effect subview

---
 .../darwin/ios/framework/Source/FlutterPlatformViewsTest.mm     | 2 +-
 .../ios/framework/Source/FlutterPlatformViews_Internal.mm       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
index d4d45a466d64e..fa766dc91636a 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
@@ -1265,7 +1265,7 @@ - (void)testBackdropFilterVisualEffectSubviewBackgroundColor {
                                visualEffectView:visualEffectView];
   CGColorRef visualEffectSubviewBackgroundColor;
   for (UIView* view in [platformViewFilter backdropFilterView].subviews) {
-    if ([view isKindOfClass:NSClassFromString(@"_UIVisualEffectSubview")]) {
+    if ([NSStringFromClass([view class]) hasSuffix:@"VisualEffectSubview"]) {
       visualEffectSubviewBackgroundColor = view.layer.backgroundColor;
     }
   }
diff --git a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm
index 133ce5abd957f..89e1687795248 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm
@@ -130,7 +130,7 @@ + (void)prepareOnce:(UIVisualEffectView*)visualEffectView {
           break;
         }
       }
-    } else if ([view isKindOfClass:NSClassFromString(@"_UIVisualEffectSubview")]) {
+    } else if ([NSStringFromClass([view class]) hasSuffix:@"VisualEffectSubview"]) {
       _indexOfVisualEffectSubview = i;
     }
   }