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使用IOS构建复制符号

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使用IOS构建复制符号,ios,xcode,flutter,dart,visual-studio-code,Ios,Xcode,Flutter,Dart,Visual Studio Code,我正在尝试在IOS上运行我的Flitter应用程序（在Android上它工作正常），但在尝试运行它时，我遇到以下错误： Launching lib/main.dart on iPhone 11 Pro Max in debug mode... Xcode build done. 13,6s Failed to build iOS app Error output from Xcode build: ↳

我正在尝试在IOS上运行我的Flitter应用程序（在Android上它工作正常），但在尝试运行它时，我遇到以下错误：

 Launching lib/main.dart on iPhone 11 Pro Max in debug mode...
Xcode build done.                                           13,6s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **
Xcode's output:
↳
    duplicate symbol '_OBJC_IVAR_$_GULZeroingWeakContainer._object' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler.o
    duplicate symbol '_OBJC_CLASS_$_GULAppDelegateObserver' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler.o
    duplicate symbol '_OBJC_METACLASS_$_GULAppDelegateObserver' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler.o
    duplicate symbol '_OBJC_CLASS_$_GULZeroingWeakContainer' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler.o
    duplicate symbol '_OBJC_METACLASS_$_GULZeroingWeakContainer' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler.o
    duplicate symbol '_OBJC_CLASS_$_GULAppDelegateSwizzler' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler.o
    duplicate symbol '_OBJC_METACLASS_$_GULAppDelegateSwizzler' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler.o
    duplicate symbol '_OBJC_IVAR_$_GULAppDelegateObserver._isObserving' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULAppDelegateSwizzler.o
    duplicate symbol '_GULLogError' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULLogger 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULLogger.o
    duplicate symbol '_kGULNetworkTempDirectoryName' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants.o
    duplicate symbol '_kGULNetworkHTTPStatusCodeUnavailable' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants.o
    duplicate symbol '_kGULNetworkHTTPStatusCodeNotFound' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants.o
    duplicate symbol '_kGULNetworkHTTPStatusCodeFound' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants.o
    duplicate symbol '_kGULNetworkHTTPStatusCodeNotModified' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants.o
    duplicate symbol '_kGULNetworkHTTPStatusCodeCannotAcceptTraffic' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants.o
    duplicate symbol '_kGULNetworkHTTPStatusOK' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkConstants.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._request' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._completionHandler' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_CLASS_$_GULNetworkURLSession' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_METACLASS_$_GULNetworkURLSession' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._URLSession' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._sessionConfig' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._loggerDelegate' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._backgroundNetworkEnabled' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._downloadedData' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._networkDirectoryURL' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._uploadingFileURL' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_OBJC_IVAR_$_GULNetworkURLSession._sessionID' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNetworkURLSession.o
    duplicate symbol '_GULNSDataZlibRemainingBytesKey' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNSData+zlib 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNSData+zlib.o
    duplicate symbol '_GULNSDataZlibErrorKey' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNSData+zlib 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNSData+zlib.o
    duplicate symbol '_GULNSDataZlibErrorDomain' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNSData+zlib 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULNSData+zlib.o
    duplicate symbol '_OBJC_CLASS_$_GULReachabilityChecker' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker.o
    duplicate symbol '_OBJC_METACLASS_$_GULReachabilityChecker' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker.o
    duplicate symbol '_GULReachabilityStatusString' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker.o
    duplicate symbol '_OBJC_IVAR_$_GULReachabilityChecker.reachability_' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker.o
    duplicate symbol '_OBJC_IVAR_$_GULReachabilityChecker.host_' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker 2.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/GoogleUtilities.build/Objects-normal/x86_64/GULReachabilityChecker.o
    ld: 91 duplicate symbols for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    duplicate symbol '_pb_field_iter_next' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_common 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_common.o
    duplicate symbol '_pb_field_iter_begin' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_common 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_common.o
    duplicate symbol '_pb_field_iter_find' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_common 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_common.o
    duplicate symbol '_pb_decode_svarint' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode.o
    duplicate symbol '_pb_decode_varint' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode.o
    duplicate symbol '_pb_decode_noinit' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode.o
    duplicate symbol '_pb_decode_delimited_noinit' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode.o
    duplicate symbol '_pb_istream_from_buffer' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode.o
    duplicate symbol '_pb_close_string_substream' in:
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode 3.o
        /Users/youni/Library/Developer/Xcode/DerivedData/Runner-bdpblnudevgtxmfuhxwqrsfeiwpe/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/nanopb.build/Objects-normal/x86_64/pb_decode.o
    ld: 34 duplicate symbols for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    note: Using new build systemnote: Planning buildnote: Constructing build descriptionwarning: Mapping architecture armv7 to i386. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'image_picker' from project 'Pods')warning: Mapping architecture arm64 to x86_64. Ensure that this target's Architectures and Valid Architectures build settings are configured correctly for the iOS Simulator platform. (in target 'image_picker' from project 'Pods')
Could not build the application for the simulator.
Error launching application on iPhone 11 Pro Max.
Exited (sigterm)
目标平台：IOS 目标操作系统版本/浏览器：9.0 设备：iphone11promax

使用“颤振分析”命令，发现的问题只是一些未使用的导入或变量。 颤振医生-v：

[✓] Flutter (Channel stable, v1.9.1+hotfix.5, on Mac OS X 10.14.6 18G103, locale it-IT)
    • Flutter version 1.9.1+hotfix.5 at /Users/youni/Desktop/YoUni/flutter
    • Framework revision 1aedbb1835 (4 weeks ago), 2019-10-17 08:37:27 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0

[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from: https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK components.
      (or visit https://flutter.dev/setup/#android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.
      You may also want to add it to your PATH environment variable.


[✓] Xcode - develop for iOS and macOS (Xcode 11.0)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.0, Build version 11A420a
    • CocoaPods version 1.6.0

[!] Android Studio (version 3.4)
    • Android Studio at /Applications/Android Studio.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)

[✓] VS Code (version 1.39.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.6.0

[✓] Connected device (1 available)
    • iPhone 11 Pro Max • AC410C15-8848-486F-B911-2826D9BCD39F • ios • com.apple.CoreSimulator.SimRuntime.iOS-13-0 (simulator)

! Doctor found issues in 2 categories.
我将image_picker插件升级到最新版本，第一次应用程序正常运行时，第二次出现此错误。所以我不明白这个错误是由这个插件引起的还是其他原因引起的。如果我错过了或您需要一些其他信息，请告诉我。
另外，由于字符限制，我不得不删除Xcode输出的一些行，如果您需要完整的日志，请告诉我。

这对我很有效-对于报告警告的目标，请将“有效体系结构”设置更改为：

$(VALID_ARCHS)
x86_64
您是否可以尝试将部署目标更改为，例如，13.2？我希望这会有所帮助

当project位于iCloud目录中时，会发生这种情况，导致文件重复。我看到了两种变通方法：

1-从根项目中删除重复文件始终在不使用-delete的情况下运行find命令，以确保没有删除不需要的文件

find . -name \*\ 2.\*
find . -name \*\ 2.\* -delete
find . -name \*\ 3.\*
find . -name \*\ 3.\* -delete
flutter clean
flutter run
2-使用以下命令清洁/重新安装吊舱（在颤振项目根上）

最终的解决方案是从iCloud目录中删除颤振项目。不过，我也在iCloud目录中使用它，以确保备份我的“gitignored”文件。我也在寻找更好的解决方案

让我知道它是否有效。

当
flatter package get
未完成或由于连接问题或类似问题而陷入死锁时，会发生这种情况

以下命令将执行临时修复

  cd ios/
  pod cache clean --all
  pod deintegrate --verbose
  pod setup --verbose
  pod install --verbose
我希望有帮助

直到我发现我有一个flatter/.pub缓存目录，其中包含文件的多个副本，显然每次都会复制到~/Library/Developer/Xcode/DerivedData/

删除.pub缓存目录和所有现有的DerivedData目录后，我的构建再次开始工作

我的开发文件夹在iCloud上，也许这与为什么要启动它有关。奇怪的是，.pub缓存目录还没有（还）回来，我需要继续关注它。

当我收到这些奇怪的东西时，有时执行“flutter clean”会有所帮助。以防万一你还没试过。我很抱歉，但对我来说没用。我还试图删除DeriveData文件夹并运行flutter clean，但没有任何效果。顺便说一下，谢谢你的回答。作为IOS部署目标，最高版本是13.0，但没有任何更改。 
  cd ios/
  pod cache clean --all
  pod deintegrate --verbose
  pod setup --verbose
  pod install --verbose