问题1:Waiting for another flutter command to release the startup lock...
解决方案:
1.关闭Android Studio
2.打开flutter安装目录/bin/cache
3.删除lockfile文件
4.此时可在命令行再执行flutter相关命令,完美解决
问题2:/Users/xxx/Library/Developer/Xcode/DerivedData/Runner-acjlsfxxstpxiugijrpmhlepowux/Build/Products/Debug-iphoneos/Runner.app/Frameworks/Flutter.framework: Permission denied
解决方案:
1.flutter channel master
2.flutter upgrade