任何人都可以解释这些错误的含义。我认为这些是框架/链接错误，但添加框架没有修复

Question

".objc_class_name_UILabel", referenced from:
    literal-pointer@__OBJC@__cls_refs@UILabel in libSCKitAppName.a(SCStretchableControl.o)

".objc_class_name_CAKeyframeAnimation", referenced from:
    literal-pointer@__OBJC@__cls_refs@CAKeyframeAnimation in libSCKitAppName.a(CAAnimationAdditions.o)

".objc_class_name_NSMutableURLRequest", referenced from:
    literal-pointer@__OBJC@__cls_refs@NSMutableURLRequest in libSCFoundationAppName.a(SCFileDownloadOperation.o)
    literal-pointer@__OBJC@__cls_refs@NSMutableURLRequest in libSCFoundationAppName.a(SCStorePurchaseOperation.o)
    literal-pointer@__OBJC@__cls_refs@NSMutableURLRequest in libPMAnalytics-r69.a(Beacon.o)
    literal-pointer@__OBJC@__cls_refs@NSMutableURLRequest in libPMAnalytics-r69.a(PMFBRequest.o)

"_OBJC_CLASS_$_XMLDocument", referenced from:
    objc-class-ref-to-XMLDocument in GPPublicationIssue.o
    objc-class-ref-to-XMLDocument in GPIssueIngestOperation.o

".objc_class_name_UIActivityIndicatorView", referenced from:
    literal-pointer@__OBJC@__cls_refs@UIActivityIndicatorView in libSCKitAppName.a(SCZoomableView.o)

"_OBJC_METACLASS_$_SCParserObject", referenced from:
    _OBJC_METACLASS_$_GPItemListParserObject in GPItemListParserObject.o
    _OBJC_METACLASS_$_GPStoreBodyDescription in GPStoreBodyDescription.o
    _OBJC_METACLASS_$_GPStoreHeaderBrickList in GPStoreHeaderBrickList.o
    _OBJC_METACLASS_$_GPStoreHeaderDescription in GPStoreHeaderDescription.o
    _OBJC_METACLASS_$_GPStoreHeaderProductDetailDescription in GPStoreHeaderProductDetailDescription.o
    _OBJC_METACLASS_$_GPStoreItem in GPStoreItem.o
    _OBJC_METACLASS_$_GPStorePageDescription in GPStorePageDescription.o
    _OBJC_METACLASS_$_GPStoreRootParserObject in GPStoreRootParserObject.o
    _OBJC_METACLASS_$_GPStoreHeaderPreviewPageList in GPStoreHeaderPreviewPageList.o
    _OBJC_METACLASS_$_GPStoreHeaderPreviewPageDescription in GPStoreHeaderPreviewPageDescription.o
    _OBJC_METACLASS_$_GPStoreHeaderTitleSectionDescription in GPStoreHeaderTitleSectionDescription.o
    _OBJC_METACLASS_$_GPIssueInfo in GPIssueInfo.o
    _OBJC_METACLASS_$_GPIssueInfoRootParserObject in GPIssueInfoRootParserObject.o
    _OBJC_METACLASS_$_GPLibraryRateSection in GPLibraryRateSection.o
    _OBJC_METACLASS_$_GPLibraryNextIssueSection in GPLibraryNextIssueSection.o
    _OBJC_METACLASS_$_GPLibraryRelatedSection in GPLibraryRelatedSection.o
    _OBJC_METACLASS_$_GPLibraryAfterReaderRoot in GPLibraryAfterReaderRoot.o
    _OBJC_METACLASS_$_GPLibraryAfterReaderPage in GPLibraryAfterReaderPage.o
    _OBJC_METACLASS_$_GPLibraryShareSection in GPLibraryShareSection.o
    _OBJC_METACLASS_$_GPLibraryAction in GPLibraryAction.o
    _OBJC_METACLASS_$_GPNewsPageRootObject in GPNewsPageRootObject.o
    _OBJC_METACLASS_$_GPNewsBrickSection in GPNewsBrickSection.o
    _OBJC_METACLASS_$_GPNewsNewsSection in GPNewsNewsSection.o
    _OBJC_METACLASS_$_GPNewsPage in GPNewsPage.o

"_OBJC_CLASS_$_SCImageLoadOperation", referenced from:

Answer 1

这些实际上是链接错误。确保为项目和Target选择了最新的iOS SDK。还要确保项目浏览器中没有丢失的项目。