相关疑难解决方法(0)

在我的XCode 5项目中,我使用RestKit进行REST通信.使用模拟器一切正常,但生成ipa文件,我收到以下错误:

ld: warning: ignoring file /Users/joseph/Library/Developer/Xcode/DerivedData/XXXXXXXXXX-gdwdekevxtdfivfpsnmyykeqhulk/Build/Products/Debug-iphoneos/libRestKit.a, missing required architecture arm64 in file /Users/joseph/Library/Developer/Xcode/DerivedData/XXXXXXXXXXXXX-gdwdekevxtdfivfpsnmyykeqhulk/Build/Products/Debug-iphoneos/libRestKit.a (2 slices)
Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_RKRelationshipMapping", referenced from:
      objc-class-ref in classname-xxx.o
  "_OBJC_CLASS_$_RKObjectMapping", referenced from:
      objc-class-ref in classname-xxx.o
  "_OBJC_CLASS_$_RKRequestDescriptor", referenced from:
      objc-class-ref in classname-xxx.o
  "_OBJC_CLASS_$_RKObjectManager", referenced from:
      objc-class-ref in classname-xxx.o
  "_OBJC_CLASS_$_RKResponseDescriptor", referenced from:
      objc-class-ref in classname-xxx.o

  "_RKStatusCodeIndexSetForClass", referenced from:
      -[classname-xxx classname-Method] in classname-xxx.o
      -[classname-xxx classname-Method] in classname-xxx.o
      -[classname-xxx classname-Method] in classname-xxx.o
      -[classname-xxx classname-Method] in classname-xxx.o
      -[classname-xxx classname-Method] in classname-xxx.o
  "_RKMIMETypeJSON", referenced from:
      -[classname-xxxinitWithURLBase:timeOut:] in classname-xxx.o …