swift - 架构 i386 的 undefined symbol : "_OBJC_CLASS_$_SecIdentity"

Question

Xcode 不允许我编译这段代码:

func getIdentity(keychainArray: NSArray) -> SecIdentity? {
    let dict = keychainArray[0] as Dictionary<String,AnyObject>
    let key = kSecImportItemIdentity.takeRetainedValue()
    return dict[key] as SecIdentity?
}

编译器因以下错误而退出:

Undefined symbols for architecture i386:
"_OBJC_CLASS_$_SecIdentity", referenced from:
 __TFC9messenger10Connection19streamOpenCompletedfS0_FT_T_ in Connection.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我测试了一些东西，发现 SecIdentity 是一个类型别名。我发现当我尝试将某些内容转换为类型别名时，编译器总是会生成这些错误消息。如果我将它转换为一个类(例如 NSObject/NSDictionary)它确实有效，但 CFDictionary 也会导致错误。这有帮助吗？

Answer 1

SecIdentity and friends是安全框架的一部分，因此听起来您需要链接到它。