密码输入错误一定次数断开连接

 密码输入错误一定次数断开连接

1 /*--------------------------------------------------------------------------- 
 2  * Received a server challenge：AuthenticationChallenge 
 3  *--------------------------------------------------------------------------*/  
 4 - (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge  
 5 {  
 6     // Access has failed two times...  
 7     if ([challenge previousFailureCount] > 3)  
 8     {  
 9         [urlConnection release];  
10           
11         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Authentication Error"  
12                                                         message:"Too many unsuccessul login attempts."   
13                                                        delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];  
14           
15         [alert show];  
16         [alert release];  
17     }  
18     else   
19     {  
20         // Answer the challenge  
21         NSURLCredential *cred = [[[NSURLCredential alloc] initWithUser:@"admin"   
22                                                               password:@"password"  
23                                                            persistence:NSURLCredentialPersistenceForSession] autorelease];  
24         [[challenge sender] useCredential:cred forAuthenticationChallenge:challenge];  
25     }  
26 }