iPhoneOS12.1.sdk，低版本xcode不能编译程序到高版本的手机上

低版本xcode不能编译程序到高版本的手机上，只有将新版本的xcode里的sdk添加进旧版xcode中，重启xcode运行

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-10-20 05:04  iPhoneOS12.1.sdk\
     文件         195  2018-10-09 03:51  iPhoneOS12.1.sdk\Entitlements.plist
     文件        1673  2018-10-09 03:51  iPhoneOS12.1.sdk\SDKSettings.plist
     目录           0  2018-10-20 05:04  iPhoneOS12.1.sdk\System\
     目录           0  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\
     目录           0  2018-10-20 05:04  iPhoneOS12.1.sdk\System\Library\CoreServices\
     文件         489  2018-10-19 11:09  iPhoneOS12.1.sdk\System\Library\CoreServices\SystemVersion.plist
     目录           0  2018-10-20 05:04  iPhoneOS12.1.sdk\System\Library\frameworks\
     目录           0  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\
     文件       98568  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\Accelerate.tbd
     目录           0  2018-10-20 05:04  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\
     目录           0  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\
     目录           0  2018-10-20 09:48  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\
     目录           0  2018-10-20 09:48  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\BNNS\
     文件       23108  2018-10-16 13:39  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\BNNS\bnns.h
     文件       47325  2018-10-16 13:39  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\cblas.h
     文件      495337  2018-08-21 09:19  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\clapack.h
     目录           0  2018-10-20 09:48  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\
     文件        7868  2018-08-21 09:19  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\arithmetic.h
     文件        3780  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\base.h
     文件        2874  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\linear_systems.h
     文件         614  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\LinearAlgebra.h
     文件       20575  2018-10-20 05:07  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\matrix.h
     文件        1769  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\norms.h
     文件        6113  2018-10-16 13:39  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\object.h
     文件        3397  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\splat.h
     文件       12440  2018-10-16 13:39  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\LinearAlgebra\vector.h
     目录           0  2018-10-20 09:47  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\Quadrature\
     文件        8395  2018-10-20 05:06  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\Quadrature\Integration.h
     文件        1393  2018-10-20 05:05  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\Quadrature\Quadrature.h
     目录           0  2018-10-20 09:47  iPhoneOS12.1.sdk\System\Library\frameworks\Accelerate.framework\frameworks\vecLib.framework\Headers\Sparse\
............此处省略4021个文件信息