编译器错误:体系结构x86_64的未定义符号

Question

Undefined symbols for architecture x86_64:
  "_CFMakeCollectable", referenced from:
      -[ASIFormDataRequest encodeURL:] in ASIFormDataRequest.o
      -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
      -[ASIHTTPRequest checkRequestStatus] in ASIHTTPRequest.o
      -[ASIHTTPRequest readResponseHeaders] in ASIHTTPRequest.o
      -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
      -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
      -[ASIHTTPRequest handleStreamComplete] in ASIHTTPRequest.o
      ...
  "_CFReadStreamCopyError", referenced from:
      -[ASIHTTPRequest handleStreamError] in ASIHTTPRequest.o
  "_CFReadStreamCopyProperty", referenced from:
      -[ASIHTTPRequest checkRequestStatus] in ASIHTTPRequest.o
      -[ASIHTTPRequest readResponseHeaders] in ASIHTTPRequest.o
      -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
      -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
      -[ASIHTTPRequest handleStreamComplete] in ASIHTTPRequest.o
  "_CFReadStreamHasBytesAvailable", referenced from:
      -[ASIHTTPRequest handleBytesAvailable] in ASIHTTPRequest.o
  "_CFReadStreamOpen", referenced from:
      -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
  "_CFReadStreamSetClient", referenced from:
      -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
      -[ASIHTTPRequest scheduleReadStream] in ASIHTTPRequest.o
      -[ASIHTTPRequest unscheduleReadStream] in ASIHTTPRequest.o
  "_CFReadStreamSetProperty", referenced from:
      -[ASIHTTPRequest startRequest] in ASIHTTPRequest.o
      -[PFHTTPCommand scheduleInCurrentThread] in Parse(PFHTTPCommand.o)

我在尝试构建时收到此错误。有人可以指出出了什么问题吗？

Answer 1

似乎您包含头文件，但缺少 .m 文件。另外，似乎您还没有发布整个错误列表。

通常，当您没有将所有 .m 文件包含在构建阶段时，会出现此类问题。