火焰錯誤：無法運行聲音 null 安全

Question

安裝火焰后，當我在 flutter（顫振運行）中運行我的應用程序時。 關於 null 安全性，我收到了一個很長的錯誤：

Running Gradle task 'assembleDebug'...
Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

 - package:flame
 - package:ordered_set
 - package:box2d_flame
 - package:audioplayers
 - package:path_provider
 - package:flutter_svg
 - package:path_provider_linux
 - package:path_provider_windows
 - package:path_provider_platform_interface
 - package:uuid
 - package:xdg_directories
 - package:plugin_platform_interface
 - package:crypto
 - package:convert
 - package:path_drawing
 - package:xml
 - package:path_parsing
 - package:petitparser
...

Answer 1

您正在使用不支持 null 安全性的舊版本 (0.29.3)，您必須使用 1.0.0 的較新版本候選版本之一。

dependencies:
  flame: ^1.0.0-releasecandidate.11

https://pub.dev/packages/flame/versions/1.0.0-releasecandidate.11/install