iOS KeyChain secItemAdd 崩溃

Question

我正在尝试使用 KeyChain 并且不使用包装器。但是当我想读取该值时，我的代码崩溃了。

代码:

CFDictionaryRef attributes = CFDictionaryCreate(NULL, keys, values, 5, NULL, NULL);

CFDataRef result;
OSStatus status = SecItemAdd(attributes, (CFTypeRef *)&result);
if (status == errSecSuccess) {
  if (result && CFGetTypeID(result) == CFDataGetTypeID()) { //crashes here
    NSLog(@"Data");

  }


  isSuccess = YES;
} else {
  fprintf(stderr, "Error while inserting into keychain osstatus:%ld\n", status);
}

错误:EXC_BAD_ACCESS

我做错了什么？我以为SecItemAdd可以返回新添加的item

编辑:

const void *keys[] = {
    kSecClass
  , kSecAttrAccessible
  , kSecAttrService
  , kSecAttrAccount
  , kSecValueData
};

const void *values[] = {
    kSecClassGenericPassword
  , kSecAttrAccessibleWhenUnlocked
  , (__bridge CFStringRef)service
  , (__bridge CFStringRef)account
  , data //CFDataRef
};

Answer 1

来自文档:

To obtain the data of the added item as an object of type CFDataRef, specify the return type key kSecReturnData with a value of kCFBooleanTrue.