我需要帮助，因为我不小心认为我删除了一些Flutter框架，现在每当我想通过Android Studio在IOS模拟器上启动应用程序时就会出现这个错误。
我已经更新了Pods并更改了pod.lock文件，但似乎什么都没有起作用。请问是否有人能够帮忙？
Xcode's output:
↳
error: the following command failed with exit code 0 but produced no further output
CompileC /Users/joshuachase/Library/Developer/Xcode/DerivedData/Runner-bhfxndfyrvpnssfyeliwkcyzjvoz/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/image_picker.build/Objects-normal/x86_64/FLTImagePickerPlugin.o /Users/joshuachase/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker-0.6.7+4/ios/Classes/FLTImagePickerPlugin.m normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:88:26: Error: Type 'DiagnosticableMixin' not found.
class PictureStream with DiagnosticableMixin {
^^^^^^^^^^^^^^^^^^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:192:44: Error: Type 'DiagnosticableMixin' not found.
abstract class PictureStreamCompleter with DiagnosticableMixin {
^^^^^^^^^^^^^^^^^^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:88:7: Error: The type 'DiagnosticableMixin' can't be mixed in.
class PictureStream with DiagnosticableMixin {
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:192:16: Error: The type 'DiagnosticableMixin' can't be mixed in.
abstract class PictureStreamCompleter with DiagnosticableMixin {
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:167:11: Error: Superclass has no method named 'debugFillProperties'.
super.debugFillProperties(properties);
^^^^^^^^^^^^^^^^^^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:171:30: Error: The method 'toStringShort' isn't defined for the class 'PictureStreamCompleter'.
- 'PictureStreamCompleter' is from 'package:flutter_svg/src/picture_stream.dart' ('../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart').
Try correcting the name to the name of an existing method, or defining a method named 'toStringShort'.
ifPresent: _completer?.toStringShort(),
^^^^^^^^^^^^^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:266:11: Error: Superclass has no method named 'debugFillProperties'.
super.debugFillProperties(description);
^^^^^^^^^^^^^^^^^^^
Command PhaseScriptExecution failed with a nonzero exit code
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Constructing build description
Could not build the application for the simulator.
Error launching application on iPhone 11.
flutter clean吗？ - undefinedflutter build ios命令，是否会出现相同的错误？ - undefined