如何使用苹果的钥匙扣？(How do I use Apple Keychain?)

我使用的尝试使用scifihifi-iphone（从GitHub）来存储和检索用户名和密码。 然而，当我添加类SFHFKeychainUtils我收到以下错误：

  "_kSecAttrAccount", referenced from:
      _kSecAttrAccount$non_lazy_ptr in SFHFKeychainUtils.o
  "_SecItemDelete", referenced from:
      +[SFHFKeychainUtils deleteItemForUsername:andServiceName:error:] in SFHFKeychainUtils.o
  "_kSecReturnAttributes", referenced from:
      _kSecReturnAttributes$non_lazy_ptr in SFHFKeychainUtils.o
  "_kSecClass", referenced from:
      _kSecClass$non_lazy_ptr in SFHFKeychainUtils.o
  "_kSecClassGenericPassword", referenced from:
      _kSecClassGenericPassword$non_lazy_ptr in SFHFKeychainUtils.o
  "_SecItemAdd", referenced from:
      +[SFHFKeychainUtils storeUsername:andPassword:forServiceName:updateExisting:error:] in SFHFKeychainUtils.o
  "_kSecAttrLabel", referenced from:
      _kSecAttrLabel$non_lazy_ptr in SFHFKeychainUtils.o
  "_SecItemUpdate", referenced from:
      +[SFHFKeychainUtils storeUsername:andPassword:forServiceName:updateExisting:error:] in SFHFKeychainUtils.o
  "_kSecAttrService", referenced from:
      _kSecAttrService$non_lazy_ptr in SFHFKeychainUtils.o
  "_kSecReturnData", referenced from:
      _kSecReturnData$non_lazy_ptr in SFHFKeychainUtils.o
  "_SecItemCopyMatching", referenced from:
      +[SFHFKeychainUtils getPasswordForUsername:andServiceName:error:] in SFHFKeychainUtils.o
      +[SFHFKeychainUtils getPasswordForUsername:andServiceName:error:] in SFHFKeychainUtils.o
  "_kSecValueData", referenced from:
      _kSecValueData$non_lazy_ptr in SFHFKeychainUtils.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

我该怎么面对呢？ 当我点击了错误，它没有考虑我在代码中的任何地方。

Answer 1:

添加Security.framework ，然后重建。 有时候，我觉得我必须建立干净，然后重新生成。

要添加此，右键点击Xcode中的目标，然后添加- >现有的框架，并选择（或浏览）到Security.framework 。

文章来源: How do I use Apple Keychain?