github代碼，運行提示 沒有查看的權限

The file "UIMenuBarDemo" couldn't be opened because you don't have permission to view it.

github上下載了代碼，運行時出現以下提示：

選擇 Build settings頁面，找到 Compiler for C/C++/Objective-C

選擇支持的編譯器便可。