Simulator Flickering Issue with Latest Flutter and iOS Versions #148660
Description
Steps to reproduce
After updating Flutter to version 3.22 and iOS to version 17.5, I've encountered a bug in the iOS simulator. The simulator screen flickers whenever an animation occurs, such as when a loading indicator is displayed. This issue did not exist before the updates.
-
Update Flutter and iOS:
- Ensure your Flutter is updated to version 3.22.
- Ensure your iOS is updated to version 17.5.
-
Open a Flutter Project:
-
Add an Animation:
-
Run the Project in the iOS Simulator:
- Open the iOS simulator.
- Run the Flutter project using the command
flutter run.
-
Observe the Issue:
- Observe the simulator for any screen flickering when the animation (e.g., the loading indicator) is running.
Environment
- Flutter version: 3.22
- iOS version: 17.5
- Simulator device: [iPhone 15 pro]
Expected results
The iOS simulator should run smoothly without any screen flickering during animations. For example, when a loading indicator is displayed, the animation should appear seamlessly without any visual disturbances. The application should function as intended, providing a stable and clear user experience.
Actual results
After updating Flutter to version 3.22 and iOS to version 17.5, the iOS simulator exhibits screen flickering whenever an animation occurs. For example, when a loading indicator is displayed, the screen flickers continuously, disrupting the animation and overall user experience. This issue was not present before the updates.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: Text('Flicker Test')),
body: Center(
child: CircularProgressIndicator(),
),
),
);
}
}Screenshots or Video
Screenshots / Video demonstration
Simulator.Screen.Recording.-.iPhone.15.Pro.-.2024-05-20.at.11.44.16.mp4
Logs
Flutter Doctor output
Doctor output
flutter doctor -v
[✓] Flutter (Channel stable, 3.22.0, on macOS 14.5 23F79 darwin-x64, locale en-IN)
• Flutter version 3.22.0 on channel stable at /Users/macsho/development/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 5dcb86f68f (11 days ago), 2024-05-09 07:39:20 -0500
• Engine revision f6344b75dc
• Dart version 3.4.0
• DevTools version 2.34.3
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
• Android SDK at /Users/macsho/Library/Android/sdk
• Platform android-34, build-tools 34.0.0
• ANDROID_HOME = /Users/macsho/Library/Android/sdk
• ANDROID_SDK_ROOT = /Users/macsho/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.10+0-17.0.10b1087.21-11572160)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 15.4)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 15F31d
• CocoaPods version 1.15.2
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2023.3)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 17.0.10+0-17.0.10b1087.21-11572160)
[✓] VS Code (version 1.89.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.89.20240501
[✓] Connected device (4 available)
• Sinnoor’s iPhone (mobile) • 00008110-0016391E2E29401E • ios • iOS 17.5 21F79
• iPhone 15 Pro (mobile) • 057185C5-1CED-4300-9FDE-24444626C307 • ios •
com.apple.CoreSimulator.SimRuntime.iOS-17-5 (simulator)
• macOS (desktop) • macos • darwin-x64 • macOS 14.5 23F79 darwin-x64
• Chrome (web) • chrome • web-javascript • Google Chrome 124.0.6367.208
[✓] Network resources
• All expected network resources are available.
• No issues found!