xcode – 命令… swiftc失败,退出代码为1

CompileSwiftSources normal x86_64 com.apple.xcode.tools.swift.compiler
cd "/Users/user/Documents/Music Kit A"
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -target x86_64-apple-macosx10.10 -module-name Music_Kit_A -Onone -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -g -module-cache-path /Users/user/Library/Developer/Xcode/DerivedData/ModuleCache -I /Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Products/Debug -F /Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Products/Debug -c -j4 /Users/user/Documents/Music Kit A/Music Kit A/AppDelegate.swift /Users/user/Documents/Music Kit A/Music Kit A/main.swift -output-file-map /Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/Objects-normal/x86_64/Music Kit A-OutputFileMap.json -parseable-output -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/Objects-normal/x86_64/Music_Kit_A.swiftmodule -Xcc -I/Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/Music Kit A-generated-files.hmap -Xcc -I/Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/Music Kit A-own-target-headers.hmap -Xcc -I/Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/Music Kit A-all-target-headers.hmap -Xcc -iquote -Xcc /Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/Music Kit A-project-headers.hmap -Xcc -I/Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Products/Debug/include -Xcc -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -Xcc -I/Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/DerivedSources/x86_64 -Xcc -I/Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/DerivedSources -Xcc -DDEBUG=1 -emit-objc-header -emit-objc-header-path /Users/user/Library/Developer/Xcode/DerivedData/Music_Kit_A-cimwnaollginmxefzprqiioyrhfl/Build/Intermediates/Music Kit A.build/Debug/Music Kit A.build/Objects-normal/x86_64/Music_Kit_A-Swift.h

Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc failed with exit code 1

我尝试过的：

>清理项目
>评论我的最后更改
>创建一个新项目并传输代码

当我创建一个新项目时,这个错误就会消失,但是另一个错误就是说有一个隐含的主要入口点.搜索整个项目的主要功能,但没有任何显示.我的整个代码是here,如果有任何用处的话.