Xcode 9 遇到:Implicit declaration

2017-10-27  本文已影响1222人  AnderQZ

最近经常遇到这个报错:

Implicit declaration of function 'select' is invalid in C99

还有这个:

Declaration of 'select' must be imported from module 'Darwin.POSIX.sys.time' before it is required

如下图:

Screen Shot 2017-10-27 at 15.19.00.png

解决办法:

导入头文件:#include <sys/time.h>
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