欢迎
我在导入flatter_colorpicker包时遇到问题当我在我的项目中导入它时：import 'package:flutter_colorpicker/flutter_colorpicker.dart';我得到这个错误：
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_colorpicker-0.5.0/lib/src/hsv_picker.dart:730:43: Error: The parameter 'event' of the method 'AlwaysWinPanGestureRecognizer.addAllowedPointer' has type 'PointerDownEvent', which does not match the corresponding type, 'PointerEvent', in the overridden method, 'DragGestureRecognizer.addAllowedPointer'.
- 'PointerDownEvent' is from 'package:flutter/src/gestures/events.dart' ('/C:/src/flutter/packages/flutter/lib/src/gestures/events.dart').
- 'PointerEvent' is from 'package:flutter/src/gestures/events.dart' ('/C:/src/flutter/packages/flutter/lib/src/gestures/events.dart').
Change to a supertype of 'PointerEvent', or, for a covariant parameter, a subtype.
void addAllowedPointer(PointerDownEvent event) {
^
/C:/src/flutter/packages/flutter/lib/src/gestures/monodrag.dart:256:8: Context: This is the overridden method ('addAllowedPointer').
void addAllowedPointer(PointerEvent event) {
^
这是扑动医生的结果
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 2.2.1, on Microsoft Windows [Version 10.0.17763.1577], locale en-US)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[√] Chrome - develop for the web
[√] Android Studio (version 3.6)
[√] IntelliJ IDEA Community Edition (version 2021.1)
[√] VS Code (version 1.56.2)
[√] Connected device (3 available)
• No issues found!
这是项目的依赖项：
dependencies:
flutter:
sdk: flutter
shared_preferences: ^2.0.6
flutter_colorpicker: ^0.5.0
有人有解决方案吗？感谢每一个
只需将flatter_colorpicker版本更改为0.4.0
一个选项是将协变关键字添加到addAllowedPointer(协变PointerEvent事件(｛
正在给出错误，但此选项只能解决您计算机上的问题
这些可能会有所帮助：将pubspec.yaml中的依赖项更改为：
dependencies:
flutter:
sdk: flutter
flutter_colorpicker: ^0.6.0
运行flutter clean，然后再次添加依赖项，这对我有效：(