[!] Flutter (Channel stable, 2.0.5, on macOS 11.3 20E232 darwin-x64, locale
zh-Hans-CN)
? Downloaded executables cannot execute on host.
See https://github.com/flutter/flutter/issues/6207 for more information
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
? Android licenses not accepted. To resolve this, run: flutter doctor
--android-licenses
[?] Xcode - develop for iOS and macOS
[?] Chrome - develop for the web
[?] Android Studio (version 4.1)
[?] VS Code (version 1.52.1)
[?] Connected device (1 available)
! Error: Errors were encountered while preparing your device for
development. Please check the Devices and Simulators Window. (code -1)
! Error: iPad is not connected. Xcode will continue when iPad is connected.
(code -13)
! Doctor found issues in 2 categories.
重新安装flutter时，运行flutter doctor，报如上述提示。
报错一：
[!] Flutter (Channel stable, 2.0.5, on macOS 11.3 20E232 darwin-x64, locale
zh-Hans-CN)
? Downloaded executables cannot execute on host.
See https://github.com/flutter/flutter/issues/6207 for more information
参考文章：https://blog.csdn.net/u012359453/article/details/82431133
由于 我这次是重新安装，所以我觉得可能是缓存的问题，所以使用了清除缓存的方法。执行命令后，再次运行flutter doctor，报错消失。
解决方案：
rm -rf ~/flutter/bin/cache
报错二：
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
? Android licenses not accepted. To resolve this, run: flutter doctor
--android-licenses
报错中已经给出解决方案。运行后根据提示进行操作，再次执行flutter doctor，报错解决。
解决方案：
flutter doctor --android-licenses
