iphone - 将 PayPal 与 iOS 应用程序集成编译错误

Question

这是我在 stackoverflow 上发表的第一篇文章，但该网站在过去一年左右的时间里已经帮助我加载了 - 非常感谢!

无论如何，我正在尝试将 PayPal 支付 iOS 库集成到我一直在制作的 iPhone 应用程序中，但是当我去编译该应用程序时，我第二次尝试获取支付对象的实例时遇到 95 错误。

我遇到的错误类型如下所示:

  "_OBJC_CLASS_$_NSUserDefaults", referenced from:


  objc-class-ref-to-NSUserDefaults in libPayPalMEP.a(PPUtils.o)


  objc-class-ref-to-NSUserDefaults in libPayPalMEP.a(PPContext.o)

“inflateInit”，引用自:

  -[GZipper DR] in libPayPalMEP.a(GZipper.o)

“_xmlNodeListGetString”，引用自:

  +[NSString(USAdditions) deserializeNode:] in libPayPalMEP.a(USAdditions.o)


  -[common_PhoneNumberType obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[common_AccountIdentifier obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[common_BaseAddress obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[common_ClientDetailsType obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[common_CurrencyType obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[common_ErrorData obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[common_ResponseEnvelope obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[common_FaultMessage obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[common_RequestEnvelope obfp_deserializeElementsFromNode:] in libPayPalMEP.a(common.o)


  -[i_CT obfp_deserializeElementsFromNode:] in libPayPalMEP.a(ap.o)

鉴于到处都有很多 .o 扩展名，我猜这是一个链接错误，而不是特定于 paypal 库的错误，但我不知道从哪里开始寻找这个问题。我四处搜索了很多，但没有发现任何接近问题的东西，所以我猜我在将库添加到我的项目时做了一些非常愚蠢的事情。我已经按照文档的“如何添加..”部分进行了操作，所以真的不确定发生了什么。我过去为其他项目添加了其他库，但它们比这个简单得多。

任何帮助将不胜感激

干杯

西蒙

附言。为那些好奇的人在此处找到的图书馆文档 paypal lib docs iOS

编辑 1:

好吧，多亏了 Jim 31，我的错误已经消失了，但我仍然剩下 64 - 这是 S O 允许我发布的完整编译错误记录，抱歉长度 - 我试过了围绕它挖掘我应该寻找的线索，但我认为这超出了我目前的能力，所以我还没有走得太远 - 再次感谢您的帮助!

Undefined symbols: "_OBJC_CLASS_$_NSUserDefaults", referenced from: objc-class-ref-to-NSUserDefaults in libPayPalMEP.a(PPUtils.o) objc-class-ref-to-NSUserDefaults in libPayPalMEP.a(PPContext.o) "_OBJC_METACLASS_$_UIImageView", referenced from: _OBJC_METACLASS_$_PayPalTabView in libPayPalMEP.a(PayPalTabView.o) "_OBJC_CLASS_$_UIFont", referenced from: objc-class-ref-to-UIFont in libPayPalMEP.a(PayPal.o) objc-class-ref-to-UIFont in libPayPalMEP.a(PayPalMEPUtility.o) objc-class-ref-to-UIFont in libPayPalMEP.a(PayPalViewClass.o) objc-class-ref-to-UIFont in libPayPalMEP.a(PayPalGrandTotalView.o) objc-class-ref-to-UIFont in libPayPalMEP.a(ReceiverDetailsView.o) "_OBJC_CLASS_$_UIButton", referenced from: objc-class-ref-to-UIButton in libPayPalMEP.a(PayPal.o) objc-class-ref-to-UIButton in libPayPalMEP.a(PayPalViewClass.o) objc-class-ref-to-UIButton in libPayPalMEP.a(PayPalTabView.o) objc-class-ref-to-UIButton in libPayPalMEP.a(PayPalPaymentDetailsView.o) objc-class-ref-to-UIButton in libPayPalMEP.a(PayPalExpandingView.o) "_OBJC_CLASS_$_NSError", referenced from: objc-class-ref-to-NSError in libPayPalMEP.a(PayPal.o) objc-class-ref-to-NSError in libPayPalMEP.a(AdaptivePayments.o) "_OBJC_CLASS_$_NSHTTPURLResponse", referenced from: objc-class-ref-to-NSHTTPURLResponse in libPayPalMEP.a(AdaptivePayments.o) "_OBJC_CLASS_$_NSThread", referenced from: objc-class-ref-to-NSThread in libPayPalMEP.a(PayPalPageTracking.o) objc-class-ref-to-NSThread in libPayPalMEP.a(PayPalProgressIndicator.o) objc-class-ref-to-NSThread in libPayPalMEP.a(PayPalCreatePINViewController.o) "_OBJC_CLASS_$_NSDateFormatter", referenced from: objc-class-ref-to-NSDateFormatter in libPayPalMEP.a(PPUtils.o) objc-class-ref-to-NSDateFormatter in libPayPalMEP.a(USAdditions.o) objc-class-ref-to-NSDateFormatter in libPayPalMEP.a(PayPalViewClass.o) objc-class-ref-to-NSDateFormatter in libPayPalMEP.a(NSDate+ISO8601Unparsing.o) "_OBJC_CLASS_$_NSBundle", referenced from: objc-class-ref-to-NSBundle in libPayPalMEP.a(PPUtils.o) objc-class-ref-to-NSBundle in libPayPalMEP.a(PayPalPageTracking.o) objc-class-ref-to-NSBundle in libPayPalMEP.a(PPMobileInterrogationReq.o) "_OBJC_CLASS_$_UIView", referenced from: objc-class-ref-to-UIView in libPayPalMEP.a(PPMEPRootViewController.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalLoginViewController.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalMEPUtility.o) _OBJC_CLASS_$_PayPalProgressIndicator in libPayPalMEP.a(PayPalProgressIndicator.o) _OBJC_CLASS_$_PayPalViewClass in libPayPalMEP.a(PayPalViewClass.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalViewClass.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalPreapprovalCodeViewController.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalCreatePINViewController.o) _OBJC_CLASS_$_PayPalErrorView in libPayPalMEP.a(PayPalErrorView.o) _OBJC_CLASS_$_PayPalAmountView in libPayPalMEP.a(PayPalAmountView.o) _OBJC_CLASS_$_PayPalExpandableImageView in libPayPalMEP.a(PayPalExpandableImageView.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalExpandableImageView.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalPaymentDetailsView.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalShoppingCartView.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalExpandingViewWithDrawer.o) _OBJC_CLASS_$_PayPalTotalView in libPayPalMEP.a(PayPalTotalView.o) _OBJC_CLASS_$_PayPalGrandTotalView in libPayPalMEP.a(PayPalGrandTotalView.o) _OBJC_CLASS_$_PayPalExpandingView in libPayPalMEP.a(PayPalExpandingView.o) objc-class-ref-to-UIView in libPayPalMEP.a(PayPalExpandingView.o) _OBJC_CLASS_$_PayPalPleaseWaitView in libPayPalMEP.a(PayPalPleaseWaitView.o) objc-class-ref-to-UIView in libPayPalMEP.a(ReceiverDetailsView.o) "_OBJC_CLASS_$_NSOperation", referenced from: _OBJC_CLASS_$_AdaptivePaymentsSOAP11BindingOperation in libPayPalMEP.a(AdaptivePayments.o) "_OBJC_CLASS_$_NSLocale", referenced from: objc-class-ref-to-NSLocale in libPayPalMEP.a(PPStringUtil.o) objc-class-ref-to-NSLocale in libPayPalMEP.a(PPUtils.o) "_OBJC_CLASS_$_NSException", referenced from: objc-class-ref-to-NSException in libPayPalMEP.a(PPStringUtil.o) objc-class-ref-to-NSException in libPayPalMEP.a(USAdditions.o) "_OBJC_CLASS_$_UIColor", referenced from: objc-class-ref-to-UIColor in libPayPalMEP.a(PayPal.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PPMEPRootViewController.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalMEPUtility.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalProgressIndicator.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalViewClass.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalCreatePINViewController.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalTabView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalErrorView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalHelpViewController.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalAmountView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalExpandableImageView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalPaymentDetailsView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalShoppingCartView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalExpandingViewWithDrawer.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalTotalView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalGrandTotalView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalExpandingView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(PayPalPleaseWaitView.o) objc-class-ref-to-UIColor in libPayPalMEP.a(ReceiverDetailsView.o) "_OBJC_CLASS_$_UIViewController", referenced from: _OBJC_CLASS_$_PPMEPRootViewController in libPayPalMEP.a(PPMEPRootViewController.o) _OBJC_CLASS_$_PayPalLoginViewController in libPayPalMEP.a(PayPalLoginViewController.o) _OBJC_CLASS_$_PayPalFatalErrorViewController in libPayPalMEP.a(PayPalFatalErrorViewController.o) _OBJC_CLASS_$_PayPalCreatePINViewController in libPayPalMEP.a(PayPalCreatePINViewController.o) _OBJC_CLASS_$_PayPalReviewViewController in libPayPalMEP.a(PayPalReviewViewController.o) _OBJC_CLASS_$_PayPalHelpViewController in libPayPalMEP.a(PayPalHelpViewController.o) "_OBJC_CLASS_$_NSURLConnection", referenced from: objc-class-ref-to-NSURLConnection in libPayPalMEP.a(PPMobileConnect.o) objc-class-ref-to-NSURLConnection in libPayPalMEP.a(AdaptivePayments.o) "_OBJC_CLASS_$_NSMutableSet", referenced from: objc-class-ref-to-NSMutableSet in libPayPalMEP.a(PayPalCreatePINViewController.o) "_OBJC_CLASS_$_NSObject", referenced from: _OBJC_CLASS_$_PayPal in libPayPalMEP.a(PayPal.o) _OBJC_CLASS_$_PayPalPhoneUtil in libPayPalMEP.a(PayPalPhoneUtil.o) _OBJC_CLASS_$_PPStringUtil in libPayPalMEP.a(PPStringUtil.o) _OBJC_CLASS_$_PayPalInvoiceItem in libPayPalMEP.a(PayPalInvoiceItem.o) _OBJC_CLASS_$_PayPalAdvancedPayment in libPayPalMEP.a(PayPalAdvancedPayment.o) _OBJC_CLASS_$_PayPalContext in libPayPalMEP.a(PayPalContext.o) _OBJC_CLASS_$_PPImageUtil in libPayPalMEP.a(PPImageUtil.o) _OBJC_CLASS_$_PayPalMEPUtility in libPayPalMEP.a(PayPalMEPUtility.o) _OBJC_CLASS_$_PayPalInvoiceData in libPayPalMEP.a(PayPalInvoiceData.o) _OBJC_CLASS_$_PPUtils in libPayPalMEP.a(PPUtils.o) _OBJC_CLASS_$_PPReceiverPaymentDetails in libPayPalMEP.a(PayPalReceiverPaymentDetails.o) _OBJC_CLASS_$_PayPalPageTracking in libPayPalMEP.a(PayPalPageTracking.o) _OBJC_CLASS_$_PPTransactionManager in libPayPalMEP.a(PPTransactionManager.o) _OBJC_CLASS_$_WebServiceCaller in libPayPalMEP.a(PPTransactionManager.o) _OBJC_CLASS_$_PPMobileAPIInterface in libPayPalMEP.a(PPMobileAPIInterface.o) _OBJC_CLASS_$_PayPalPreapprovalDetails in libPayPalMEP.a(PayPalPreapprovalDetails.o) _OBJC_CLASS_$_PPMobileAPIRes in libPayPalMEP.a(PPMobileAPIRes.o) _OBJC_CLASS_$_SOAPFault in libPayPalMEP.a(USAdditions.o) _OBJC_CLASS_$_USBoolean in libPayPalMEP.a(USAdditions.o) _OBJC_CLASS_$_PayPalErrorObject in libPayPalMEP.a(PayPalErrorObject.o) _OBJC_CLASS_$_common_RequestEnvelope in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_FaultMessage in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_ResponseEnvelope in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_ErrorData in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_CurrencyType in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_ClientDetailsType in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_BaseAddress in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_AccountIdentifier in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_PhoneNumberType in libPayPalMEP.a(common.o) _OBJC_CLASS_$_PayPalReceiverAmounts in libPayPalMEP.a(PayPalReceiverAmounts.o) _OBJC_CLASS_$_i_DM in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BV in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DL in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BU in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DK in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BT in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DJ in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BS in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DI in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BR in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DH in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BQ in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DG in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BP in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DF in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BO in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DE in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BN in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DD in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BM in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DC in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BL in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DB in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BK in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_DA in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BJ in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CZ in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BI in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CX in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CW in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CV in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CU in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CS in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CR in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CQ in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CP in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CN in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CO in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CM in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CL in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CJ in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CK in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_J in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CI in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CH in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CG in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CD in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CE in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CF in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CC in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CB in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_CA in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BY in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BZ in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BX in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_BW in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_i_K in libPayPalMEP.a(ap.o) _OBJC_CLASS_$_PPContext in libPayPalMEP.a(PPContext.o) _OBJC_CLASS_$_PayPalSystemPreference in libPayPalMEP.a(PayPalSystemPreference.o) _OBJC_CLASS_$_PPMobileAuthenticateReq in libPayPalMEP.a(PPMobileAuthenticateReq.o) _OBJC_CLASS_$_PPMobileInterrogationReq in libPayPalMEP.a(PPMobileInterrogationReq.o) _OBJC_CLASS_$_PayPalAmounts in libPayPalMEP.a(PayPalAmounts.o) _OBJC_CLASS_$_PPMobileConnect in libPayPalMEP.a(PPMobileConnect.o) _OBJC_CLASS_$_PayPalAddress in libPayPalMEP.a(PayPalAddress.o) _OBJC_CLASS_$_AdaptivePaymentsSOAP11BindingResponse in libPayPalMEP.a(AdaptivePayments.o) _OBJC_CLASS_$_AdaptivePaymentsSOAP11Binding_envelope in libPayPalMEP.a(AdaptivePayments.o) _OBJC_CLASS_$_AdaptivePaymentsSOAP11Binding in libPayPalMEP.a(AdaptivePayments.o) _OBJC_CLASS_$_AdaptivePayments in libPayPalMEP.a(AdaptivePayments.o) _OBJC_CLASS_$_PPMobileRemoveDeviceAuthReq in libPayPalMEP.a(PPMobileRemoveDeviceAuthReq.o) _OBJC_CLASS_$_PPMobileCreatePINReq in libPayPalMEP.a(PPMobileCreatePINReq.o) _OBJC_CLASS_$_USGlobals in libPayPalMEP.a(USGlobals.o) _OBJC_CLASS_$_PayPalCurrencyUtil in libPayPalMEP.a(PayPalCurrencyUtil.o) "_OBJC_CLASS_$_NSString", referenced from: objc-class-ref-to-NSString in libPayPalMEP.a(PayPal.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalPhoneUtil.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalLoginViewController.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPUtils.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalPageTracking.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPTransactionManager.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPMobileAPIInterface.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPMobileInterrogationRes.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPMobileAPIRes.o) l_OBJC_$_CATEGORY_NSString_$_USAdditions in libPayPalMEP.a(USAdditions.o) objc-class-ref-to-NSString in libPayPalMEP.a(USAdditions.o) _OBJC_CLASS_$_common_ErrorParameter in libPayPalMEP.a(common.o) objc-class-ref-to-NSString in libPayPalMEP.a(common.o) objc-class-ref-to-NSString in libPayPalMEP.a(ap.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalViewClass.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPContext.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalSystemPreference.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPMobileInterrogationReq.o) _OBJC_CLASS_$_Obfuscation in libPayPalMEP.a(Obfuscation.o) objc-class-ref-to-NSString in libPayPalMEP.a(Obfuscation.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPMobileConnect.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalReviewViewController.o) objc-class-ref-to-NSString in libPayPalMEP.a(AdaptivePayments.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPMobileRemoveDeviceAuthReq.o) l_OBJC_$_CATEGORY_NSString_$_ISO8601Unparsing in libPayPalMEP.a(NSDate+ISO8601Unparsing.o) objc-class-ref-to-NSString in libPayPalMEP.a(NSDate+ISO8601Unparsing.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalAmountView.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalPaymentDetailsView.o) objc-class-ref-to-NSString in libPayPalMEP.a(PPMobileCreatePINReq.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalCurrencyUtil.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalTotalView.o) objc-class-ref-to-NSString in libPayPalMEP.a(PayPalGrandTotalView.o) objc-class-ref-to-NSString in libPayPalMEP.a(ReceiverDetailsView.o) "_OBJC_CLASS_$_UIImage", referenced from: objc-class-ref-to-UIImage in libPayPalMEP.a(PPImageUtil.o) objc-class-ref-to-UIImage in libPayPalMEP.a(PayPalProgressIndicator.o) "_OBJC_CLASS_$_UILabel", referenced from: objc-class-ref-to-UILabel in libPayPalMEP.a(PayPal.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalProgressIndicator.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalViewClass.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalCreatePINViewController.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalTabView.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalErrorView.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalHelpViewController.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalAmountView.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalPaymentDetailsView.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalTotalView.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalGrandTotalView.o) objc-class-ref-to-UILabel in libPayPalMEP.a(PayPalPleaseWaitView.o) objc-class-ref-to-UILabel in libPayPalMEP.a(ReceiverDetailsView.o) "_OBJC_METACLASS_$_UIView", referenced from: _OBJC_METACLASS_$_PayPalProgressIndicator in libPayPalMEP.a(PayPalProgressIndicator.o) _OBJC_METACLASS_$_PayPalViewClass in libPayPalMEP.a(PayPalViewClass.o) _OBJC_METACLASS_$_PayPalErrorView in libPayPalMEP.a(PayPalErrorView.o) _OBJC_METACLASS_$_PayPalAmountView in libPayPalMEP.a(PayPalAmountView.o) _OBJC_METACLASS_$_PayPalExpandableImageView in libPayPalMEP.a(PayPalExpandableImageView.o) _OBJC_METACLASS_$_PayPalTotalView in libPayPalMEP.a(PayPalTotalView.o) _OBJC_METACLASS_$_PayPalGrandTotalView in libPayPalMEP.a(PayPalGrandTotalView.o) _OBJC_METACLASS_$_PayPalExpandingView in libPayPalMEP.a(PayPalExpandingView.o) _OBJC_METACLASS_$_PayPalPleaseWaitView in libPayPalMEP.a(PayPalPleaseWaitView.o) "_OBJC_CLASS_$_NSCalendar", referenced from: objc-class-ref-to-NSCalendar in libPayPalMEP.a(USAdditions.o) objc-class-ref-to-NSCalendar in libPayPalMEP.a(NSDate+ISO8601Unparsing.o) "_OBJC_CLASS_$_NSData", referenced from: objc-class-ref-to-NSData in libPayPalMEP.a(PPImageUtil.o) l_OBJC_$_CATEGORY_NSData_$_MBBase64 in libPayPalMEP.a(USAdditions.o) l_OBJC_$_CATEGORY_NSData_$_USAdditions in libPayPalMEP.a(USAdditions.o) objc-class-ref-to-NSData in libPayPalMEP.a(USAdditions.o) objc-class-ref-to-NSData in libPayPalMEP.a(Obfuscation.o) _OBJC_CLASS_$_GZipper in libPayPalMEP.a(GZipper.o) objc-class-ref-to-NSData in libPayPalMEP.a(GZipper.o) "_OBJC_CLASS_$_NSDate", referenced from: objc-class-ref-to-NSDate in libPayPalMEP.a(PayPal.o) objc-class-ref-to-NSDate in libPayPalMEP.a(PayPalLoginViewController.o) objc-class-ref-to-NSDate in libPayPalMEP.a(PPMobileAPIInterface.o) l_OBJC_$_CATEGORY_NSDate_$_USAdditions in libPayPalMEP.a(USAdditions.o) objc-class-ref-to-NSDate in libPayPalMEP.a(USAdditions.o) objc-class-ref-to-NSDate in libPayPalMEP.a(common.o) objc-class-ref-to-NSDate in libPayPalMEP.a(ap.o) objc-class-ref-to-NSDate in libPayPalMEP.a(PPMobileConnect.o) objc-class-ref-to-NSDate in libPayPalMEP.a(AdaptivePayments.o) l_OBJC_$_CATEGORY_NSDate_$_ISO8601Unparsing in libPayPalMEP.a(NSDate+ISO8601Unparsing.o) objc-class-ref-to-NSDate in libPayPalMEP.a(NSDate+ISO8601Unparsing.o) "_OBJC_METACLASS_$_NSOperation", referenced from: _OBJC_METACLASS_$_AdaptivePaymentsSOAP11BindingOperation in libPayPalMEP.a(AdaptivePayments.o) "_OBJC_CLASS_$_NSNotificationCenter", referenced from: objc-class-ref-to-NSNotificationCenter in libPayPalMEP.a(PPMEPRootViewController.o) ".objc_class_name_PayPal", referenced from: literal-pointer@_OBJC@_cls_refs@PayPal in des3AppDelegate.o "_OBJC_METACLASS_$_UIViewController", referenced from: _OBJC_METACLASS_$_PPMEPRootViewController in libPayPalMEP.a(PPMEPRootViewController.o) _OBJC_METACLASS_$_PayPalLoginViewController in libPayPalMEP.a(PayPalLoginViewController.o) _OBJC_METACLASS_$_PayPalFatalErrorViewController in libPayPalMEP.a(PayPalFatalErrorViewController.o) _OBJC_METACLASS_$_PayPalCreatePINViewController in libPayPalMEP.a(PayPalCreatePINViewController.o) _OBJC_METACLASS_$_PayPalReviewViewController in libPayPalMEP.a(PayPalReviewViewController.o) _OBJC_METACLASS_$_PayPalHelpViewController in libPayPalMEP.a(PayPalHelpViewController.o) "_OBJC_CLASS_$_NSAutoreleasePool", referenced from: objc-class-ref-to-NSAutoreleasePool in libPayPalMEP.a(PayPal.o) objc-class-ref-to-NSAutoreleasePool in libPayPalMEP.a(PayPalPageTracking.o) objc-class-ref-to-NSAutoreleasePool in libPayPalMEP.a(PayPalProgressIndicator.o) "_OBJC_CLASS_$NSURL", referenced from: objc-class-ref-to-NSURL in libPayPalMEP.a(PayPalPageTracking.o) objc-class-ref-to-NSURL in libPayPalMEP.a(PPMobileConnect.o) objc-class-ref-to-NSURL in libPayPalMEP.a(AdaptivePayments.o) "_objc_empty_vtable", referenced from: _OBJC_METACLASS_$_PayPal in libPayPalMEP.a(PayPal.o) _OBJC_CLASS_$_PayPal in libPayPalMEP.a(PayPal.o) _OBJC_METACLASS_$_PayPalPhoneUtil in libPayPalMEP.a(PayPalPhoneUtil.o) _OBJC_CLASS_$_PayPalPhoneUtil in libPayPalMEP.a(PayPalPhoneUtil.o) _OBJC_METACLASS_$_PPStringUtil in libPayPalMEP.a(PPStringUtil.o) _OBJC_CLASS_$_PPStringUtil in libPayPalMEP.a(PPStringUtil.o) _OBJC_METACLASS_$_PPMEPRootViewController in libPayPalMEP.a(PPMEPRootViewController.o) _OBJC_CLASS_$_PPMEPRootViewController in libPayPalMEP.a(PPMEPRootViewController.o) _OBJC_METACLASS_$_PayPalInvoiceItem in libPayPalMEP.a(PayPalInvoiceItem.o) _OBJC_CLASS_$_PayPalInvoiceItem in libPayPalMEP.a(PayPalInvoiceItem.o) _OBJC_METACLASS_$_PayPalAdvancedPayment in libPayPalMEP.a(PayPalAdvancedPayment.o) _OBJC_CLASS_$_PayPalAdvancedPayment in libPayPalMEP.a(PayPalAdvancedPayment.o) _OBJC_METACLASS_$_PayPalContext in libPayPalMEP.a(PayPalContext.o) _OBJC_CLASS_$_PayPalContext in libPayPalMEP.a(PayPalContext.o) _OBJC_METACLASS_$_PayPalLoginViewController in libPayPalMEP.a(PayPalLoginViewController.o) _OBJC_CLASS_$_PayPalLoginViewController in libPayPalMEP.a(PayPalLoginViewController.o) _OBJC_METACLASS_$_PPImageUtil in libPayPalMEP.a(PPImageUtil.o) _OBJC_CLASS_$_PPImageUtil in libPayPalMEP.a(PPImageUtil.o) _OBJC_METACLASS_$_PayPalMEPUtility in libPayPalMEP.a(PayPalMEPUtility.o) _OBJC_CLASS_$_PayPalMEPUtility in libPayPalMEP.a(PayPalMEPUtility.o) _OBJC_METACLASS_$_PayPalInvoiceData in libPayPalMEP.a(PayPalInvoiceData.o) _OBJC_CLASS_$_PayPalInvoiceData in libPayPalMEP.a(PayPalInvoiceData.o) _OBJC_METACLASS_$_PPUtils in libPayPalMEP.a(PPUtils.o) _OBJC_CLASS_$_PPUtils in libPayPalMEP.a(PPUtils.o) _OBJC_METACLASS_$_PPReceiverPaymentDetails in libPayPalMEP.a(PayPalReceiverPaymentDetails.o) _OBJC_CLASS_$_PPReceiverPaymentDetails in libPayPalMEP.a(PayPalReceiverPaymentDetails.o) _OBJC_METACLASS_$_PayPalPageTracking in libPayPalMEP.a(PayPalPageTracking.o) _OBJC_CLASS_$_PayPalPageTracking in libPayPalMEP.a(PayPalPageTracking.o) _OBJC_METACLASS_$_PPTransactionManager in libPayPalMEP.a(PPTransactionManager.o) _OBJC_CLASS_$_PPTransactionManager in libPayPalMEP.a(PPTransactionManager.o) _OBJC_METACLASS_$_WebServiceCaller in libPayPalMEP.a(PPTransactionManager.o) _OBJC_CLASS_$_WebServiceCaller in libPayPalMEP.a(PPTransactionManager.o) _OBJC_METACLASS_$_PPMobileAPIInterface in libPayPalMEP.a(PPMobileAPIInterface.o) _OBJC_CLASS_$_PPMobileAPIInterface in libPayPalMEP.a(PPMobileAPIInterface.o) _OBJC_METACLASS_$_PPMobileInterrogationRes in libPayPalMEP.a(PPMobileInterrogationRes.o) _OBJC_CLASS_$_PPMobileInterrogationRes in libPayPalMEP.a(PPMobileInterrogationRes.o) _OBJC_METACLASS_$_PayPalPreapprovalDetails in libPayPalMEP.a(PayPalPreapprovalDetails.o) _OBJC_CLASS_$_PayPalPreapprovalDetails in libPayPalMEP.a(PayPalPreapprovalDetails.o) _OBJC_METACLASS_$_PPMobileAPIRes in libPayPalMEP.a(PPMobileAPIRes.o) _OBJC_CLASS_$_PPMobileAPIRes in libPayPalMEP.a(PPMobileAPIRes.o) _OBJC_METACLASS_$_SOAPFault in libPayPalMEP.a(USAdditions.o) _OBJC_CLASS_$_SOAPFault in libPayPalMEP.a(USAdditions.o) _OBJC_METACLASS_$_USBoolean in libPayPalMEP.a(USAdditions.o) _OBJC_CLASS_$_USBoolean in libPayPalMEP.a(USAdditions.o) _OBJC_METACLASS_$_PayPalErrorObject in libPayPalMEP.a(PayPalErrorObject.o) _OBJC_CLASS_$_PayPalErrorObject in libPayPalMEP.a(PayPalErrorObject.o) _OBJC_METACLASS_$_common_RequestEnvelope in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_RequestEnvelope in libPayPalMEP.a(common.o) _OBJC_METACLASS_$_common_FaultMessage in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_FaultMessage in libPayPalMEP.a(common.o) _OBJC_METACLASS_$_common_ResponseEnvelope in libPayPalMEP.a(common.o) _OBJC_CLASS_$_common_ResponseEnvelope in libPayPalMEP.a(common.o)

Answer 1

构建应用程序时需要链接到 libxml2。他们应该在文档中提到这一点，我敢肯定这是导致很多人出现这个问题的原因。

右键单击目标，选择Get Info，转到General 选项卡，然后将libxml2.dylib 添加到链接库中。