在SecItemUpdate中隐藏TouchId弹出窗口

I have seen in some touchId apps where on SecItemUpdate the touchId UI screen never pops up and the update still happens. I need similar functionality for my app and based on what I have read from Apple Developer's guide (my understanding maybe wrong) have come up with some options but they don't seem to work. Here's what I have done so far.

Setting kSecUseNoAuthenticationUI to YES, an error code -25308 is returned. Setting kSecUseNoAuthenticationUI to NO, an error code -50 is returned. If I don't include kSecUseNoAuthenticationUI, then the default authentication UI pops up.

我在一些touchId应用中见过，SecItemUpdate会显示touchId UI屏幕，而更新仍然会发生。我的应用程序需要类似的功能，根据我从苹果开发者指南(我的理解可能是错误的)中读到的内容，我提出了一些选项，但似乎并不奏效。这是我到目前为止所做的。将kSecUseNoAuthenticationUI设置为YES，返回一个错误代码-25308。将kSecUseNoAuthenticationUI设置为NO，返回错误代码-50。如果不包含kSecUseNoAuthenticationUI，则会弹出默认的身份验证UI。

NSDictionary *query = @{(__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
                        (__bridge id)kSecAttrService: @"SampleService",
                        (__bridge id)kSecUseNoAuthenticationUI: @YES
                        };

NSDictionary *changes = @{
    (__bridge id)kSecValueData: [@"UPDATED_SECRET_PASSWORD_TEXT" dataUsingEncoding:NSUTF8StringEncoding]
    };

dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    OSStatus status = SecItemUpdate((__bridge CFDictionaryRef)query, (__bridge CFDictionaryRef)changes);
    NSString *msg = [NSString stringWithFormat:NSLocalizedString(@"SEC_ITEM_UPDATE_STATUS", nil), [self keychainErrorToString:status]];
    [super printResult:self.textView message:msg];
});]

So I am lost at this point. Appreciate if you can give me some pointers on how to disable this touchId UI popup on SecItemUpdate. Thanks

所以我在这一点上迷失了。如果您能给我一些关于如何禁用这个touchId UI的提示，请在SecItemUpdate上给我一些提示。谢谢

2 个解决方案

#1

If you take a look at video WWDC 2014 Session 711, the kSecUseNoAuthenticationUI is mentioned around 31:35.

如果你看一下视频WWDC 2014第711节，你会发现kSecUseNoAuthenticationUI在31:35左右。

You can look also in "SecItem.h" :

你也可以在“SecItem”中查找。h”:

 @constant kSecUseNoAuthenticationUI Specifies a dictionary key whose value
        is a CFBooleanRef. If provided with a value of kCFBooleanTrue, the error
        errSecInteractionNotAllowed will be returned if the item is attempting
        to authenticate with UI.

I'm not sure you can both disable the pop-up and perform an update.

我不确定您是否可以禁用弹出窗口并执行更新。

What I suppose to understand : setting the kSecUseNoAuthenticationUI option will not display the pop-up. But if you 're trying to access to an item that requires an authentication, it will fail by indicating you that the item by returning a errSecInteractionNotAllowed as the operation result

我想理解的是:设置kSecUseNoAuthenticationUI选项将不会显示弹出窗口。但是，如果您试图访问需要身份验证的项，它将失败，因为它将返回一个errSecInteractionNotAllowed作为操作结果，从而指示您该项

#2

According to the iOS8 release notes, this supposed is the case and you should delete and re-add your item

根据iOS8发布说明，应该是这样的，应该删除并重新添加项目

if (status == errSecDuplicateItem) { // exists
      status = SecItemDelete((__bridge CFDictionaryRef)attributes);

      if (status == errSecSuccess) {
        status = SecItemAdd((__bridge CFDictionaryRef)attributes, nil);
      }
}

#1