[iOS] Permission dialog when pasting text from universal clipboard may be closed before user has had time to allow pasting

[HaloWang]

Steps to Reproduce

1. flutter create handoff_clipboard
2. prepare a macbook and any iOS deivce
3. make sure Apple's 'Handoff' feature is enabled on the devices above.
4. add a TextField() at somewhere of the lib/main.dart
5. run flutter on the ios device
6. cmd+c some text on the screen of macOS
7. tap TextField widget on the screen of iOS
8. tap "Paste"
9. There flash an alert and then disappear, leave a Error in console (Xcode/vscode): [Pasteboard] ...requesting item failed with error: Error Domain=PBErrorDomain Code=13 "Operation not authorized." UserInfo={NSLocalizedDescription=Operation not authorized.}
10. tap paste again, the alert will stay on the screen, looks good.

some codes in starter project, if useful

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          // 🚧 add this line
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
            // 🚧 add this line
            TextField(),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ),
    );
  }

flutter doctor

➜  ~ flutter doctor          
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.7.5, on macOS 13.2.1 22D68 darwin-arm64, locale en-CN)
[!] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.
[✓] Xcode - develop for iOS and macOS (Xcode 14.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2022.1)
[✓] VS Code (version 1.75.1)
[✓] Proxy Configuration
[✓] Connected device (3 available)
[✓] HTTP Host Availability

[danagbemava-nc]

Issue is reproducible on the latest versions of flutter.

The bug didn't reproduce for me when I was just copy/pasting text on the iPhone but when handoff entered the picture, the bug reproduced.

Pasting from Mac	Pasting from iPad
RPReplay_Final1677490522.MP4	RPReplay_Final1677491473.MP4

Related: #103163

This did not reproduce on macOS

code sample

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: const Center(
        child: TextField(),
      ),
    );
  }
}

logs

Launching lib/main.dart on Nexus in debug mode...
Automatically signing iOS for device deployment using specified development team in Xcode project: X8NNQ9CYL2
Xcode build done.                                           20.2s
(lldb) 2023-02-27 09:50:19.805448+0000 Runner[10557:2212630] [SceneConfiguration] Info.plist contained no UIScene configuration dictionary (looking for configuration named "(no name)")
[SceneConfiguration] Info.plist contained no UIScene configuration dictionary (looking for configuration named "(no name)")
Connecting to VM Service at ws://127.0.0.1:50017/VBYbgachHuY=/ws
Successfully load keyboard extensions
[SceneConfiguration] Info.plist contained no UIScene configuration dictionary (looking for configuration named "(no name)")
[Pasteboard] ...requesting item failed with error: Error Domain=PBErrorDomain Code=13 "Operation not authorized." UserInfo={NSLocalizedDescription=Operation not authorized.}
Application finished.
Exited

flutter doctor -v

[✓] Flutter (Channel stable, 3.7.5, on macOS 13.2.1 22D68 darwin-arm64, locale en-GB)
    • Flutter version 3.7.5 on channel stable at /Users/nexus/dev/sdks/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision c07f788888 (4 days ago), 2023-02-22 17:52:33 -0600
    • Engine revision 0f359063c4
    • Dart version 2.19.2
    • DevTools version 2.20.1

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
    • Android SDK at /Users/nexus/Library/Android/sdk
    • Platform android-33, build-tools 33.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14C18
    • CocoaPods version 1.11.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[!] Android Studio (version 2022.1)
    • 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
    ✗ Unable to find bundled Java version.
    • Try updating or re-installing Android Studio.

[!] Android Studio (version 2022.1)
    • Android Studio at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/221.6008.13.2211.9477386/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
    ✗ Unable to find bundled Java version.
    • Try updating or re-installing Android Studio.

[✓] IntelliJ IDEA Community Edition (version 2022.3.2)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • 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

[✓] VS Code (version 1.75.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.58.0

[✓] Connected device (5 available)
    • M2007J20CG (mobile)    • adb-5dd3be00-17AYzd._adb-tls-connect._tcp. • android-arm64  • Android 12 (API 31)
    • Nexus (mobile)         • 00008020-001875E83A38002E                  • ios            • iOS 16.3.1 20D67
    • iPhone 14 Pro (mobile) • 7256EA18-F2CB-4F96-9398-80DC7756A275       • ios            • com.apple.CoreSimulator.SimRuntime.iOS-16-2 (simulator)
    • macOS (desktop)        • macos                                      • darwin-arm64   • macOS 13.2.1 22D68 darwin-arm64
    • Chrome (web)           • chrome                                     • web-javascript • Google Chrome 110.0.5481.100
    ! Error: Dean’s iPad is busy: Waiting to connect and unlock the device. Xcode will continue when Dean’s iPad is finished. (code -10)

[✓] HTTP Host Availability
    • All required HTTP hosts are available

! Doctor found issues in 2 categories.
[!] Flutter (Channel master, 3.8.0-16.0.pre.57, on macOS 13.2.1 22D68 darwin-arm64, locale en-GB)
    • Flutter version 3.8.0-16.0.pre.57 on channel master at /Users/nexus/dev/sdks/flutters
    ! Warning: `flutter` on your path resolves to /Users/nexus/dev/sdks/flutter/bin/flutter, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutters. Consider adding /Users/nexus/dev/sdks/flutters/bin to the front of your path.
    ! Warning: `dart` on your path resolves to /Users/nexus/dev/sdks/flutter/bin/dart, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutters. Consider adding /Users/nexus/dev/sdks/flutters/bin to the front of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 45723adf4d (5 hours ago), 2023-02-26 23:35:37 -0500
    • Engine revision 88b48c357b
    • Dart version 3.0.0 (build 3.0.0-275.0.dev)
    • DevTools version 2.22.1
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
    • Android SDK at /Users/nexus/Library/Android/sdk
    • Platform android-33, build-tools 33.0.0
    • Java binary at: /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/221.6008.13.2211.9477386/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14C18
    • CocoaPods version 1.11.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.1)
    • 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 11.0.15+0-b2043.56-8887301)

[✓] Android Studio (version 2022.1)
    • Android Studio at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/221.6008.13.2211.9477386/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 11.0.15+0-b2043.56-8887301)

[✓] IntelliJ IDEA Community Edition (version 2022.3.2)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • 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

[✓] VS Code (version 1.75.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.58.0

[✓] Connected device (7 available)
    • M2007J20CG (mobile)    • adb-5dd3be00-17AYzd._adb-tls-connect._tcp. • android-arm64  • Android 12 (API 31)
    • Dean’s iPad (mobile)   • 00008103-000825C811E3401E                  • ios            • iOS 16.3.1 20D67
    • Nexus (mobile)         • 00008020-001875E83A38002E                  • ios            • iOS 16.3.1 20D67
    • iPhone 14 Pro (mobile) • 7256EA18-F2CB-4F96-9398-80DC7756A275       • ios            • com.apple.CoreSimulator.SimRuntime.iOS-16-2 (simulator)
    • macOS (desktop)        • macos                                      • darwin-arm64   • macOS 13.2.1 22D68 darwin-arm64
    • Web Server (web)       • web-server                                 • web-javascript • Flutter Tools
    • Chrome (web)           • chrome                                     • web-javascript • Google Chrome 110.0.5481.100
    ! Error: Dean’s iPad is busy: Waiting to connect and unlock the device. Xcode will continue when Dean’s iPad is finished. (code -10)

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.

[justinmc]

CC @jmagman Do we expect Handoff to work with Flutter right now? I haven't ever tried it.