刚开始接触swift，想着在mac上用 swift REPL，敲一些简单的语法，不需要一句简单的print用xcode还要编译。结果按照网上和书本的相关教程，不管怎样都无法正常使用swift REPL，尝试过stack overflow上的一些解决方案，始终无法解决，求使用过的有经验者帮帮忙。
osx version：10.10.5
xcode version：7.2.1
先转换xcode目录
sudo xcode-select -s /Applications/Xcode.app/Contents/Developer再运行xcrun swift或者swift
$ xcrun swift
Welcome to Apple Swift version 2.1.1 (swiftlang-700.1.101.15 clang-700.1.81). Type :help for assistance.
warning: Swift error in module repl_swift:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module dyld:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CoreFoundation:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libedit.3.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libz.1.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libpanel.5.4.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libncurses.5.4.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libSystem.B.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libauto.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libDiagnosticMessagesClient.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libicucore.A.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libobjc.A.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libcache.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libcommonCrypto.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libcompiler_rt.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libcopyfile.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libcorecrypto.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libdispatch.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libdyld.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libkeymgr.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module liblaunch.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libmacho.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libquarantine.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libremovefile.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_asl.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_blocks.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_c.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_configuration.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_coreservices.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_coretls.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_dnssd.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_info.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_kernel.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_m.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_malloc.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_network.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_networkextension.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_notify.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_platform.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_pthread.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_sandbox.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_secinit.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_stats.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsystem_trace.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libunc.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libunwind.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libxpc.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libc++.1.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libc++abi.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libswiftCore.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libswiftDarwin.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module Foundation:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libextension.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libarchive.2.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libxml2.2.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CFNetwork:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module SystemConfiguration:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module Security:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CoreServices:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module liblangid.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module IOKit:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libCRFSuite.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libbz2.1.0.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module liblzma.5.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libbsm.0.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libsqlite3.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libkxld.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libxar.1.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libpam.2.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libOpenScriptingUtil.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module FSEvents:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CarbonCore:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module Metadata:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module OSServices:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module SearchKit:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module AE:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module LaunchServices:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module DictionaryServices:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module DiskArbitration:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module NetFS:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module NetAuth:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module loginsupport:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module DataDetectorsCore:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module TCC:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libmecabra.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module ApplicationServices:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CoreGraphics:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CoreText:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module ImageIO:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module ATS:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module ColorSync:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module HIServices:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module LangAnalysis:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module PrintCore:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module QD:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module SpeechSynthesis:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module IOSurface:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module Accelerate:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module MultitouchSupport:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module vImage:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module vecLib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libvDSP.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libvMisc.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libLAPACK.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libBLAS.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libLinearAlgebra.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libFontParser.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libFontRegistry.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module AppleVPA:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module AppleJPEG:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libJPEG.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libTIFF.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libPng.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libGIF.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libJP2.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libRadiance.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module OpenGL:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CoreVideo:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libGLU.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libGFXShared.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libGL.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libGLImage.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libCVMSPluginSupport.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libCoreVMClient.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libcups.2.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module Kerberos:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module GSS:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libresolv.9.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libiconv.2.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module Heimdal:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libheimdal-asn1.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module OpenDirectory:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CommonAuth:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CFOpenDirectory:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module SecurityFoundation:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CoreAudio:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module AudioToolbox:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module LanguageModeling:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libcmph.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module CoreData:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module ServiceManagement:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
warning: Swift error in module libxslt.1.dylib:
Error creating module Swift AST context: couldn't get a ClangImporter
Debug info from this module will be unavailable in the debugger.
error: Error creating target Swift AST context: (null)
配置完之后，无法使用，在google搜索了一下，在stack overflow上看到个答案：
stack overflow答案 按照这个答案中的提示将文件夹转换成了系统自带的swift之后，可以进入xcrun swift界面，但是任然无法使用
sudo xcode-select --switch /Library/Developer/CommandLineTools
~ ZH$ xcode-select -p
/Library/Developer/CommandLineTools
~ ZH$ xcrun swift
Welcome to Swift version 1.2. Type :help for assistance.
1> print("hello world")
Error in auto-import:
failed to get module 'Swift' from AST context
1>
网上找来找去也就这两种配置，在我mac上都无法使用，求解决方法。
你好。同为新手，我也遇到了这个问题，暂时也没找到解决办法，请问你已经解决了吗
我的问题，更新版本便可解决，至于具体原因在哪儿，我就不清楚了，因为没时间去深究，能用了就好。所以有遇到和我问题类似情况的朋友们，不妨先升级，再试试看，如果不行再找其他方案。