Flutter： How to fix ITMS90809： Deprecated API Usage Apple 将停止接受使用 UIWebView API 的应用程序提交

在提交我的最新版本时，苹果突然返回了一条消息，说有一个问题，特别是:

ITMS-90809:不推荐的API使用——苹果将停止接受使用UIWebView API的应用提交.更多信息请参见https://developer.apple.com/documentation/uikit/uiwebview.

因为我没有使用webview插件，所以我不知道UIWebView API在哪里使用.对如何解决这个问题有什么建议吗？

使用最新的稳定Flutter 版本1.7.8+hotfix.4以及包含以下软件包时，会出现此错误:

http: ^0.12.0
shared_preferences: ^0.4.3
intl: any
permission_handler: ^2.1.2
contacts_service: ^0.2.8
image: ^2.0.5
cached_network_image: ^1.0.0
url_launcher: ^5.0.1
path_provider: ^0.5.0+1
after_layout: ^1.0.7
connectivity: ^0.4.3+1
device_info: ^0.4.0+2
firebase_auth: ^0.11.1+7
firebase_messaging: ^5.1.2
firebase_analytics: ^5.0.0
notification_permissions: ^0.4.0

所有软件包都已更新到最新版本.

flutter doctor的输出是:

[✓] Flutter (Channel stable, v1.7.8+hotfix.4, on Mac OS X 10.14.6 18G87, locale en-US)
    • Flutter version 1.7.8+hotfix.4 at /Users/per/flutter
    • Framework revision 20e59316b8 (6 weeks ago), 2019-07-18 20:04:33 -0700
    • Engine revision fee001c93f
    • Dart version 2.4.0

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at /Users/per/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 10.3, Build version 10G8
    • CocoaPods version 1.7.4

[✓] iOS tools - develop for iOS devices
    • ios-deploy 1.9.4

[✓] Android Studio (version 3.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 31.3.1
    • Dart plugin version 181.5656
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[✓] VS Code (version 1.31.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 2.25.1

[✓] Connected device (1 available)
    • Nexus 6P • 5VT7N15C31001152 • android-arm64 • Android 8.1.0 (API 27)

• No issues found!