Xode10 Error: Multiple commands produce和#import的时候闪退

最快的临时规避方案：Xcode -> File -> Project Settings -> Build System -> Legacy Build System.

或者 Xcode -> File -> Workspace Setting -> Build System ->(Legacy Build System) -> Done 运行项目即可。

1.点击项目工程：File +Project/Workspace settings

2.Change the build system to Legacy Build system .

 

 

二、stdlibc++ headers not found,Xcode10

warning: include path for stdlibc++ headers not found; pass '-std=libc++' on the command line to use the libc++ standard library instead [-Wstdlibcxx-not-found] 

Build Setting->C++ Standard Library->libstdc++

修改为

Build Setting->C++ Standard Library->libc++