Undefined symbols for architecture armv7:
"_kSecValueData", referenced from: +[WXOMTAKeyChain save:data:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecReturnData", referenced from: +[WXOMTAKeyChain load:] in libWeChatSDK.a(MTAKeyChain.o)
"_SecItemCopyMatching", referenced from: +[WXOMTAKeyChain load:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecClass", referenced from: +[WXOMTAKeyChain getKeychainQuery:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecMatchLimit", referenced from: +[WXOMTAKeyChain load:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecClassGenericPassword", referenced from: +[WXOMTAKeyChain getKeychainQuery:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecAttrService", referenced from: +[WXOMTAKeyChain getKeychainQuery:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecMatchLimitOne", referenced from: +[WXOMTAKeyChain load:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecAttrAccount", referenced from: +[WXOMTAKeyChain getKeychainQuery:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecAttrAccessibleAfterFirstUnlock",
referenced from: +[WXOMTAKeyChain getKeychainQuery:] in libWeChatSDK.a(MTAKeyChain.o)
"_kSecAttrAccessible", referenced from: +[WXOMTAKeyChain getKeychainQuery:] in libWeChatSDK.a(MTAKeyChain.o)
"_SecItemDelete", referenced from: +[WXOMTAKeyChain save:data:] in libWeChatSDK.a(MTAKeyChain.o)
+[WXOMTAKeyChain delete:] in libWeChatSDK.a(MTAKeyChain.o) "_SecItemAdd", referenced from:
+[WXOMTAKeyChain save:data:] in libWeChatSDK.a(MTAKeyChain.o) ld:
symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation)
解决办法：
添加库文件：Security.framework