Question

我目前正在使用以下代码为UIWebView设置默认凭据。这在iOS 6.1及更早版本中运行良好。但是，在iOS 7 Beta 6中，它根本不起作用。

我尝试加载的网页使用Windows身份验证。我可以在iOS 7中的Safari中打开它们。但是，当我运行下面的代码然后在UIWebView中打开URL时，我得到一个空的白色矩形，什么都没有加载！就像我说的，这在iOS 6.1及更早版本中完美运行。

我还尝试了第二种方法，即使用NSURLConnectionDelegate传递凭据。第二种方法在iOS 6.1及更早版本中也可以正常工作，但在iOS 7中已经破解。

有谁知道为什么会这样？类似的经历？想法？

// Authenticate
NSURLCredential *credential = [NSURLCredential credentialWithUser:@"myusername"
                                                         password:@"mypassword"
                                                      persistence:NSURLCredentialPersistenceForSession];

NSURLProtectionSpace *protectionSpace = [[NSURLProtectionSpace alloc]
                                         initWithHost:@"mysite.com"
                                         port:80
                                         protocol:@"http"
                                         realm:nil
                                         authenticationMethod:NSURLAuthenticationMethodDefault];

[[NSURLCredentialStorage sharedCredentialStorage] setDefaultCredential:credential forProtectionSpace:protectionSpace];

Answer 1

更新：此问题出现将在iOS 7.0.3中修复

我在Apple开发者论坛上回答了这个问题，但是现在iOS7还没有测试版，我会在这里重新发布。目前，iOS7中的Windows身份验证已中断。我希望很快就能解决，但在此之前，您可以通过在包含UIWebView的UIViewController中处理身份验证挑战来解决此问题。

基本上你

自己制作NSURLRequest和NSURLConnection
处理连接：didReceiveAuthenticationChallenge：
在连接中：didReceivedResponse手动将数据加载到UIWebView

下面我正在加载PDF，但无论您的内容类型如何，此过程的工作方式都相同。

//Make sure you implement NSURLConnectionDelegate and NSURLConnectionDataDelegate in your header

@interface MyViewController ()
@property (weak, nonatomic) IBOutlet UIWebView *webView;
@property (strong, nonatomic) NSURLConnection *conn;
@property (strong, nonatomic) NSMutableData *pdfData;
@end

@implementation MyViewController 


//... all of your init and other standard UIViewController methods here...


//Method that loads UIWebview. You'll probably call this in viewDidLoad or somewhere similar... 
- (void) loadWebView {

    //Make Request manually with an NSURLConnection... 
    NSString *url = //Get your url
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
    self.conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

}

//#pragma mark - NSURLConnectionDelegate

//Handle authentication challenge (NSURLConnectionDelegate)
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
    if([challenge previousFailureCount] == 0) {

        NSString *username = //Get username
        NSString *password = //Get password

        //Use credentials to authenticate
        NSURLCredential *cred = [NSURLCredential credentialWithUser:username password:password persistence:NSURLCredentialPersistencePermanent];
        [[challenge sender] useCredential:cred forAuthenticationChallenge:challenge];

    } else {

        //Cancel authentication & connection
        [[challenge sender] cancelAuthenticationChallenge:challenge];
        [self.conn cancel];
        self.conn = nil;
    }
}

//#pragma mark - NSURLConnectionDataDelegate

//Received response (NSURLConnectionDataDelegate)
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {

    //Init data
    self.pdfData = [NSMutableData data];
}

//Collect data as it comes in (NSURLConnectionDataDelegate)
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [self.pdfData appendData:data];
}

//Handle connection failure (NSURLConnectionDataDelegate)
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {

    //Clean up... 
    [self.conn cancel];
    self.conn = nil;
    self.pdfData = nil;

    //TODO: Notify user and offer next step...
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

    //Finally, load data into UIWebview here (I'm loading a PDF)...
    [self.webView loadData:self.pdfData MIMEType:@"application/pdf" textEncodingName:@"utf-8" baseURL:nil];
}


@end

Answer 2

我遇到了同样的问题 - 为Windows身份验证配置的Sharepoint站点的NSURLConnection在iOS 6.1中运行良好。在iOS 7中 - 无论我是否针对6或7定位和构建应用程序 - 所有身份验证似乎都成功（接收正确的cookie）但仍然以401响应;随cookie一起发送的所有后续请求也将收到401。

我通过转储didReceiveAuthenticationChallenge委托协议来支持willSendRequestForAuthenticationChallenge来解决这个问题。实现第二个委托协议意味着第一个永远不会被调用。

在您的委托中，实施此委托协议：

- (void)connection:(NSURLConnection *)sender willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
   if ([challenge previousFailureCount] > 0]) {
       [[challenge sender] cancelAuthenticationChallenge:challenge];
   }else{
      NSURLCredential *credential = [NSURLCredential credentialWithUser:@"username" password:@"password" persistence:NSURLPersistenceForSession];
   [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];
   }
}

我一时兴起实现这一点后，我的iOS 7 NTLM身份验证问题就消失了。

setDefaultCredential不适用于iOS 7中的UIWebView，但在早期的iOS版本中运行良好

2 个答案: