Flutter的坑

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