在重新启动应用程序之前，iOS中基于证书的客户端身份验证无效

Question

当我从服务器下载p12文件并将其设置为NSURLCredential时：

- (NSURLCredential *)getCredential 
{
     NSURLCredential *credential = nil;
     NSString *thePath = //Certificate path
     NSData *PKCS12Data = [[NSData alloc] 

initWithContentsOfFile:thePath];
CFDataRef inPKCS12Data = (__bridge  CFDataRef)PKCS12Data;

OSStatus status = 1; // an error
SecIdentityRef myIdentity;
SecTrustRef myTrust;
if (PKCS12Data)
    status = extractIdentityAndTrust(inPKCS12Data, &myIdentity, &myTrust); 

if (status == noErr) {
    SecCertificateRef myCert = NULL;
    status = SecIdentityCopyCertificate (myIdentity, &myCert);  
    if (status == noErr) {
        SecPolicyRef myPolicy = SecPolicyCreateBasicX509(); 
        SecCertificateRef certArray[1] = { myCert };
        CFArrayRef myCerts = CFArrayCreate(NULL, (void *)certArray, 1, NULL);
        status = SecTrustCreateWithCertificates(myCerts, myPolicy, &myTrust);   

        SecTrustResultType trustResult;
        if (status == noErr) {
            status = SecTrustEvaluate(myTrust, &trustResult);
        }
        if (status == noErr) {
            credential = [NSURLCredential credentialWithIdentity:myIdentity
                                                certificates:(__bridge NSArray *)myCerts
                                                 `enter code here`persistence:NSURLCredentialPersistenceNone];
            }
            CFRelease(myCerts); 
        }
    }

        return credential;
    }

// extractIdentityAndTrust方法

OSStatus extractIdentityAndTrust(CFDataRef inPKCS12Data, SecIdentityRef *outIdentity, SecTrustRef *outTrust)

{

OSStatus securityError = errSecSuccess;

NSString* password = gDataManager.certPass;//CFSTR("qqqqq11");
const void *keys[] =   { kSecImportExportPassphrase };
const void *values[] = { (__bridge  const void *)(password) };
CFDictionaryRef optionsDictionary = CFDictionaryCreate(NULL, keys, values, 1, NULL, NULL);

CFArrayRef items = CFArrayCreate(NULL, 0, 0, NULL);
securityError = SecPKCS12Import(inPKCS12Data, optionsDictionary, &items);
if (securityError == 0) {
    CFDictionaryRef myIdentityAndTrust = CFArrayGetValueAtIndex (items, 0);
    const void *tempIdentity = NULL;
    tempIdentity = CFDictionaryGetValue (myIdentityAndTrust, kSecImportItemIdentity);
    *outIdentity = (SecIdentityRef)tempIdentity;
    const void *tempTrust = NULL;
    tempTrust = CFDictionaryGetValue (myIdentityAndTrust, kSecImportItemTrust);
    *outTrust = (SecTrustRef)tempTrust;
} else {
    NSError *error = [NSError errorWithDomain:NSOSStatusErrorDomain code:securityError userInfo:nil];
    NSLog(@"Error: %@", [error description]);
}

if (optionsDictionary)
    CFRelease(optionsDictionary);

return securityError;

}

当我这样做时，它不起作用。但如果我关闭并打开应用程序，它的工作正常。有人知道如何解决这个问题吗？

谢谢！