ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory. 是什么意思啊
你好,请问你安装成功了吗,要怎么安装啊,命令要用什么去执行,我没有看懂啊
小白一枚,请问 iOS 怎么安装啊,感觉看不懂啊