Flutter failed to create a directory at "/Users/xumin/Desktop/flutter_file/blue_flu/build/af621ddbed114883e996f81e9885096f". The flutter tool cannot access the file or directory. Please ensure that the SDK and/or project is installed in a location that has read/write permissions for the current user.
原因是没有给父文件夹权限
sudo chmod -R 777 * 就可以了
