工程在不小心刪除了一個連結庫的情況下，突然出現了下面錯誤：

Undefined symbols for architecture i386:
  "_u_errorName", referenced from:
      _rkl_NSExceptionForRegex in libPods.a(RegexKitLite.o)
      _rkl_makeNSError in libPods.a(RegexKitLite.o)
      _rkl_userInfoDictionary in libPods.a(RegexKitLite.o)
  "_u_strlen", referenced from:
      _rkl_userInfoDictionary in libPods.a(RegexKitLite.o)
  "_uregex_appendReplacement", referenced from:
      _rkl_replaceAll in libPods.a(RegexKitLite.o)
  "_uregex_appendTail", referenced from:
      _rkl_replaceAll in libPods.a(RegexKitLite.o)
  "_uregex_clone", referenced from:
      -[RKLBlockEnumerationHelper initWithRegex:options:string:range:error:] in libPods.a(RegexKitLite.o)
  "_uregex_close", referenced from:
      _rkl_clearCachedRegex in libPods.a(RegexKitLite.o)
  "_uregex_end", referenced from:
      _rkl_performRegexOp in libPods.a(RegexKitLite.o)
      _rkl_findRanges in libPods.a(RegexKitLite.o)
      _rkl_search in libPods.a(RegexKitLite.o)
  "_uregex_find", referenced from:
      _rkl_search in libPods.a(RegexKitLite.o)
  "_uregex_findNext", referenced from:
      _rkl_search in libPods.a(RegexKitLite.o)
      _rkl_replaceAll in libPods.a(RegexKitLite.o)
  "_uregex_groupCount", referenced from:
      _rkl_getCachedRegex in libPods.a(RegexKitLite.o)
  "_uregex_open", referenced from:
      _rkl_getCachedRegex in libPods.a(RegexKitLite.o)
  "_uregex_reset", referenced from:
      _rkl_replaceAll in libPods.a(RegexKitLite.o)
  "_uregex_setText", referenced from:
      -[RKLBlockEnumerationHelper initWithRegex:options:string:range:error:] in libPods.a(RegexKitLite.o)
      _rkl_clearCachedRegexSetTo in libPods.a(RegexKitLite.o)
      _rkl_setCachedRegexToString in libPods.a(RegexKitLite.o)
  "_uregex_start", referenced from:
      _rkl_performRegexOp in libPods.a(RegexKitLite.o)
      _rkl_findRanges in libPods.a(RegexKitLite.o)
      _rkl_search in libPods.a(RegexKitLite.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
 

啊舒服的阿薩德阿薩德發阿薩德發阿薩德發

才發現是Other Linker Flags，缺少了licucore。

然後在Other Linker Flags後面，新增“-licucore”就可以了。