try 在Web浏览器中运行Flutter 应用程序时出错.
以下是我在运行该应用程序时获得的输出:
Launching lib/main.dart on Chrome in debug mode...
Waiting for connection from debug service on Chrome...
../../../.pub-cache/hosted/pub.dartlang.org/wav
e-0.1.0/lib/config.dart:46:13: Error: Method not found: 'throwNullError'.
throwNullError('custom', 'colors` or `gradients');
^^^^^^^^^^^^^^
../../../.pub-cache/hosted/pub.dartlang.org/wave-0.1.0/lib/config.dart:60:13: Error: Method not found: 'throwNullError'.
throwNullError('custom', 'durations');
^^^^^^^^^^^^^^
../../../.pub-cache/hosted/pub.dartlang.org/wave-0.1.0/lib/config.dart:66:13: Error: Method not found: 'throwNullError'.
throwNullError('custom', 'heightPercentages');
^^^^^^^^^^^^^^
../../../.pub-cache/hosted/pub.dartlang.org/flutter_platform_widgets-0.60.2/lib/src/platform_app_bar.dart:209:9: Error: No named parameter with the name 'actionsForegroundColor'.
actionsForegroundColor: data?.actionsForegroundColor,
^^^^^^^^^^^^^^^^^^^^^^
../../FlutterProjects/SDK/flutter/packages/flutter/lib/src/cupertino/nav_bar.dart:220:9: Context: Found this candidate, but the arguments don't match.
const CupertinoNavigationBar({
^^^^^^^^^^^^^^^^^^^^^^
../../../.pub-cache/hosted/pub.dartlang.org/flutter_platform_widgets-0.60.2/lib/src/platform_app_bar.dart:229:7: Error: No named parameter with the name 'actionsForegroundColor'.
actionsForegroundColor: data?.actionsForegroundColor,
^^^^^^^^^^^^^^^^^^^^^^
../../FlutterProjects/SDK/flutter/packages/flutter/lib/src/cupertino/nav_bar.dart:220:9: Context: Found this candidate, but the arguments don't match.
const CupertinoNavigationBar({
^^^^^^^^^^^^^^^^^^^^^^
../../../.pub-cache/hosted/pub.dartlang.org/flutter_neumorphic-3.0.3/lib/src/widget/app_bar.dart:147:57: Error: No named parameter with the name 'nullOk'.
final ScaffoldState scaffold = Scaffold.of(context, nullOk: true);
^^^^^^
../../FlutterProjects/SDK/flutter/packages/flutter/lib/src/material/scaffold.dart:1930:24: Context: Found this candidate, but the arguments don't match.
static ScaffoldState of(BuildContext context) {
^^
../../FlutterProjects/SDK/flutter/packages/flutter_localizations/lib/src/material_localizations.dart:413:7: Error: Method 'replaceFirst' cannot be called on 'String?' because it is potentially null.
Try calling using ?. instead.
).replaceFirst(r'$selectedRowCount', formatDecimal(selectedRowCount));
^^^^^^^^^^^^
../../FlutterProjects/SDK/flutter/packages/flutter_localizations/lib/src/material_localizations.dart:550:7: Error: Method 'replaceFirst' cannot be called on 'String?' because it is potentially null.
Try calling using ?. instead.
).replaceFirst(r'$licenseCount', formatDecimal(licenseCount));
^^^^^^^^^^^^
../../FlutterProjects/SDK/flutter/packages/flutter_localizations/lib/src/material_localizations.dart:659:7: Error: Method 'replaceFirst' cannot be called on 'String?' because it is potentially null.
Try calling using ?. instead.
).replaceFirst(r'$remainingCount', formatDecimal(remainingCount));
^^^^^^^^^^^^
../../../.pub-cache/hosted/pub.dartlang.org/chewie-0.9.10/lib/src/chewie_player.dart:83:7: Error: No named parameter with the name 'resizeToAvoidBottomPadding'.
resizeToAvoidBottomPadding: false,
^^^^^^^^^^^^^^^^^^^^^^^^^^
../../FlutterProjects/SDK/flutter/packages/flutter/lib/src/material/scaffold.dart:1437:9: Context: Found this candidate, but the arguments don't match.
const Scaffold({
^^^^^^^^
../../../.pub-cache/hosted/pub.dartlang.org/chewie-0.9.10/lib/src/chewie_player.dart:276:17: Error: The method 'inheritFromWidgetOfExactType' isn't defined for the class 'BuildContext'.
- 'BuildContext' is from 'package:flutter/src/widgets/framework.dart' ('../../FlutterProjects/SDK/flutter/packages/flutter/lib/src/widgets/framework.dart').
Try correcting the name to the name of an existing method, or defining a method named 'inheritFromWidgetOfExactType'.
context.inheritFromWidgetOfExactType(_ChewieControllerProvider)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Failed to compile application.
以下是我的Flutter doctor 输出:
[✓] Flutter (Channel master, 1.26.0-2.0.pre.419, on macOS 11.1 20C69 darwin-x64, locale en-GB)
• Flutter version 1.26.0-2.0.pre.419 at /Users/sanket/Desktop/FlutterProjects/SDK/flutter
• Framework revision 913d5933c1 (4 hours ago), 2021-01-19 22:34:03 -0800
• Engine revision b58dbc88fc
• Dart version 2.12.0 (build 2.12.0-240.0.dev)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
• Android SDK at /Users/sanket/Library/Android/sdk
• Platform android-30, build-tools 30.0.2
• ANDROID_HOME = /Users/sanket/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
• All Android licenses accepted.
[!] Xcode - develop for iOS and macOS
• Xcode at /Applications/Xcode2.app/Contents/Developer
• Xcode 12.0, Build version 12A7209
! Xcode 12.0.0 out of date (12.0.1 is recommended).
Download the latest version or update via the Mac App Store.
• CocoaPods version 1.10.0
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 4.1)
• 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 1.8.0_242-release-1644-b3-6915495)
[✓] Connected device (2 available)
• AOSP on IA Emulator (mobile) • emulator-5554 • android-x86 • Android 9 (API 28) (emulator)
• Chrome (web) • chrome • web-javascript • Google Chrome 87.0.4280.141
! Doctor found issues in 1 category.
Process finished with exit code 0
请帮我解决这个错误，我的应用程序之前在浏览器中运行，但我不知道它什么时候停止工作.
我试着升级了Flutter 翼和dart 的版本来解决这个问题，但是仍然不能工作.