Apple Mach-O链接器错误。 链接器命令失败，退出代码为1

Question

My App worked fine the last couple of days, but suddenly I get this error.

I already tried these things:

• Restart Xcode & mac
• Clean Projects
• Clean Derived Data Folder

Here is the error:

ld /Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Products/Debug-iphonesimulator/sampleappTests.xctest/sampleappTests normal x86_64
    cd /Users/someuser/Development/Workspaces/2015/ios/myapp
    export IPHONEOS_DEPLOYMENT_TARGET=8.2
    export PATH="/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode-beta.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -bundle -isysroot /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.3.sdk -L/Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Products/Debug-iphonesimulator -F/Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Products/Debug-iphonesimulator -F/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.3.sdk/Developer/Library/Frameworks -F/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks -F/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.3.sdk/Developer/Library/Frameworks -filelist /Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Intermediates/sampleapp.build/Debug-iphonesimulator/sampleappTests.build/Objects-normal/x86_64/sampleappTests.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -bundle_loader /Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Products/Debug-iphonesimulator/myapp.app/myapp -Xlinker -objc_abi_version -Xlinker 2 -framework XCTest -L/Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator -Xlinker -add_ast_path -Xlinker /Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Intermediates/sampleapp.build/Debug-iphonesimulator/sampleappTests.build/Objects-normal/x86_64/sampleappTests.swiftmodule -mios-simulator-version-min=8.2 -Xlinker -dependency_info -Xlinker /Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Intermediates/sampleapp.build/Debug-iphonesimulator/sampleappTests.build/Objects-normal/x86_64/sampleappTests_dependency_info.dat -o /Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Products/Debug-iphonesimulator/sampleappTests.xctest/sampleappTests

ld: file not found: /Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dohndrkqlwlrkeggboazluaanniz/Build/Products/Debug-iphonesimulator/myapp.app/myapp
clang: error: linker command failed with exit code 1 (use -v to see invocation)

And here is one more warning

ld: warning: linking against dylib not safe for use in application extensions: /Users/someuser/Library/Developer/Xcode/DerivedData/myapp-dsaagxaaoxqxgxcwdhubkhreboeb/Build/Products/Debug-iphonesimulator/Pods/Alamofire.framework/Alamofire

Answer 1

Removing the Checkbox for the Test-Targets fixed the problem.

Answer 2

If you run into this problem with Cocoapods during unit testing, you can just add pods to your testing target and run pod update in the terminal. Here comes my example and it solves the problem:

target 'YourProject' do
    # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
    use_frameworks!

    # Pods for YourProject
    pod 'RAMAnimatedTabBarController', '~> 2.0.13'
    pod 'XLPagerTabStrip', '~> 7.0'
    pod 'ZFRippleButton'
    pod 'Alamofire', '~> 4.4'
    pod 'SWXMLHash', '~> 4.0.0'
    pod 'SQLite.swift', '~> 0.11.3'
    pod 'DZNEmptyDataSet'
    pod 'PKHUD', '~> 4.0'

    target 'YourProjectTests' do
        # inherit! :search_paths
        # Pods for testing
        pod 'RAMAnimatedTabBarController', '~> 2.0.13'
        pod 'XLPagerTabStrip', '~> 7.0'
        pod 'ZFRippleButton'
        pod 'Alamofire', '~> 4.4'
        pod 'SWXMLHash', '~> 4.0.0'
        pod 'SQLite.swift', '~> 0.11.3'
        pod 'DZNEmptyDataSet'
        pod 'PKHUD', '~> 4.0'
    end

    target 'YourProjectUITests' do
        inherit! :search_paths
        # Pods for testing
    end

end

After adding pods above, run pod update .