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我想通過使用+credentialWithIdentity:certificates:persistence:方法創建一個NSURLCredential。但是它返回零。NSURLCredential創建返回null
我已經完成了以下步驟。首先我創建一個私鑰和公鑰，然後生成一個證書並將其添加到我的鑰匙串中。 第一個問題，當我這樣做：
static const uint8_t certificateIdentifier[] = "test.certificate";
NSData * certificateTag = [NSData dataWithBytes:certificateIdentifier length:sizeof(certificateIdentifier)];
SecCertificateRef cert = SecCertificateCreateWithData(NULL, (__bridge CFDataRef) certificadoData);
NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
[dictionary setObject:(__bridge id)kSecClassCertificate forKey:(__bridge id)kSecClass];
[dictionary setObject:certificateTag forKey:(__bridge id)kSecAttrApplicationTag];
[dictionary setObject:(__bridge id)(cert) forKey:(__bridge id<NSCopying>)(kSecValueRef)];
OSStatus status = SecItemAdd((__bridge CFDictionaryRef)dictionary, NULL);
狀態告訴我，我certificateTag是無效參數。 如果我不把這個標籤，我可以把我的鑰匙串中的證書，然後
(void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
我把
SecIdentityRef myIdentity;
SecCertificateRef myCertificate;
NSMutableDictionary * queryCertificate = [[NSMutableDictionary alloc] init];
[queryCertificate setObject:(__bridge id)kSecClassIdentity forKey:(__bridge id)kSecClass];
[queryCertificate setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef];
OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)queryCertificate, (CFTypeRef *)&myIdentity);
status = SecIdentityCopyCertificate(myIdentity, &myCertificate);
const void *certs[] = { myCertificate };
CFArrayRef certsArray = CFArrayCreate(NULL, certs, 1, NULL);
NSURLCredential *credential = [NSURLCredential credentialWithIdentity:myIdentity certificates:(__bridge NSArray*)certsArray persistence:NSURLCredentialPersistencePermanent];
[[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];
我的身份和證書正確方法，但該證書內一直沒有返回，不是一個錯誤，只是null。 任何想法爲什麼？