问题描述:用“pod update”更新,遇到如下错误

Pull is not possible because you have unmerged files.

Please, fix them up in the work tree, and then use 'git add/rm <file>'

as appropriate to mark resolution, or use 'git commit -a'.


A bug was found in libgit2 and they had to execute a force push on the specs repo. This is what broke everyone's CocoaPods setup.

You can find the official post about this issue on the CocoaPods blog :

The recommended way to fix your setup is to execute the following commands :

$ pod repo remove master
$ pod setup

If that doesn't work, you can also delete manually all your cached specs :

$ rm -rf ~/.cocoapods/
$ pod setup


问题描述:使用CocoaPods加了TestFlight类库:pod 'TestFlightSDK', '~> 2.0.2'

报如下错误:"_OBJC_CLASS_$_TestFlight", referenced from:


In the Build Settings, do not override "Other Linker Flags". If it is bold, select it press backspace, it should be back to its normal state. If it is not fixed, delete all flags, remove and reinstall Pods and that should fix it.

可能是Other Linker Flags自定义的时候CocoaPods就不更新的关系。


问题描述:想更新CocoaPods,在终端运行sudo gem update cocoapods,出现如下错误:

Updating cocoapods
Building native extensions. This could take a while...
ERROR: Error installing cocoapods:
ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h
Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/xcodeproj-0.13.1 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/xcodeproj-0.13.1/ext/xcodeproj/gem_make.out

问题解决:Go to Xcode, Preferences -> Downloads,download Command Line Tools.


Undefined symbols for architecture i386:
"_FBTokenInformationExpirationDateKey", referenced from:
-[PFFacebookTokenCachingStrategy cacheTokenInformation:] in Parse(PFFacebookTokenCachingStrategy.o)
-[PFFacebookTokenCachingStrategy expirationDate] in Parse(PFFacebookTokenCachingStrategy.o)
-[PFFacebookTokenCachingStrategy setExpirationDate:] in Parse(PFFacebookTokenCachingStrategy.o)
"_FBTokenInformationTokenKey", referenced from:
-[PFFacebookTokenCachingStrategy accessToken] in Parse(PFFacebookTokenCachingStrategy.o)
-[PFFacebookTokenCachingStrategy setAccessToken:] in Parse(PFFacebookTokenCachingStrategy.o)
"_FBTokenInformationUserFBIDKey", referenced from:
-[PFFacebookTokenCachingStrategy facebookId] in Parse(PFFacebookTokenCachingStrategy.o)
-[PFFacebookTokenCachingStrategy setFacebookId:] in Parse(PFFacebookTokenCachingStrategy.o)
"_OBJC_CLASS_$_FBAppCall", referenced from:
objc-class-ref in Parse(PFFacebookAuthenticationProvider.o)
"_OBJC_CLASS_$_FBRequest", referenced from:
objc-class-ref in Parse(PFFacebookAuthenticationProvider.o)
"_OBJC_CLASS_$_FBSession", referenced from:
objc-class-ref in Parse(PFFacebookAuthenticationProvider.o)
"_OBJC_CLASS_$_FBSessionTokenCachingStrategy", referenced from:
_OBJC_CLASS_$_PFFacebookTokenCachingStrategy in Parse(PFFacebookTokenCachingStrategy.o)
"_OBJC_METACLASS_$_FBSessionTokenCachingStrategy", referenced from:
_OBJC_METACLASS_$_PFFacebookTokenCachingStrategy in Parse(PFFacebookTokenCachingStrategy.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
方法二:设置单独的静态库,使用-force_load /path/libname.a来替换之前的配置-all_load _ObjC