错误：Apple Mach-O链接器（Id）警告

Question

In my app I have been working to import and export the database.

I have imported some files which is required for this functionality but when i try to run the app in simulator the errors listed below occurs. I can't understand which type of errors are these. so plz help me solve this problem.

Undefined symbols for architecture i386:
  "_inflateInit2_", referenced from:
      -[NSData(NSDataExtension) gzipInflate] in NSData+CocoaDevUsersAdditions.o
  "_inflate", referenced from:
      -[NSData(NSDataExtension) gzipInflate] in NSData+CocoaDevUsersAdditions.o
  "_inflateEnd", referenced from:
      -[NSData(NSDataExtension) gzipInflate] in NSData+CocoaDevUsersAdditions.o
  "_deflateInit2_", referenced from:
      -[NSData(NSDataExtension) gzipDeflate] in NSData+CocoaDevUsersAdditions.o
  "_deflate", referenced from:
      -[NSData(NSDataExtension) gzipDeflate] in NSData+CocoaDevUsersAdditions.o
  "_deflateEnd", referenced from:
      -[NSData(NSDataExtension) gzipDeflate] in NSData+CocoaDevUsersAdditions.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

Answer 1

You didn't include the libz.tbd where those functions are. Select the project node, select your target, go to the Build Phases tab, expand "Link Binaries With Libraries", add libz.dylib, and try again.

Answer 2

将libz.dylib添加到您的框架中，它将起作用。

Answer 3

我遇到了同样的问题，感谢Jano，在我将Libz.dylib添加到项目中之后，该问题得以解决。