Question

我一直在试图弄清楚为什么NSURLConnection没有向我的班级调用它的委托方法。该方法将在99.999％的时间内正常工作，但在奇怪的情况下，将创建NSURLConnection，然后不回调。我已经使用调试信息检查了线程，以确保它在主线程上执行（此函数只能通过按下始终在主线程上的UI元素来调用）。我还检查了那时的连接数，并且已经多次检查过1次因此我无法达到任何形式的连接最大计数。用于此次调用的URL每次都相同，因此我排除了错误的URL，因为它在大多数时间都有效

下面的代码显示了被调用的函数：

- (void) getProperties:(NSString *) userID propertyFlag:(PropertyFlag)propertyFlag delegate:(id) target setState:(id) state
{
    if(!userID)
    {
        NSException *anException = [[NSException alloc] initWithName:NSInvalidArgumentException reason:@"userId is equal to nil" userInfo:nil];
        [anException raise];
    }

    NSDictionary *userState = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:target, state, self, FUNCTION_NAME, nil]
                                                      forKeys:[NSArray arrayWithObjects:@"callback", @"state", @"_self", @"request", nil]];

    // Create the connection state handler and set the delegates and type
    ConnectionStateHandler *connectionStateHandler = [[ConnectionStateHandler alloc] init];
    connectionStateHandler.delegate = self;
    connectionStateHandler.state = userState;

    // create the target URL
    NSString *targetURL = [NSString stringWithFormat:@"someurl"];
    NSURL *url = [NSURL URLWithString:targetURL];

    DLog(@"getProperties:propertyFlag:delegate:setState - url: %@", targetURL);
    DLog(@"Is%@ main thread", ([NSThread isMainThread] ? @"" : @" NOT"));

    // create the request
    NSMutableURLRequest *request = [PSMNSURLRequestBuilder createRequestWithURL:url];

    connectionStateHandler.connection = [[[NSURLConnection alloc] initWithRequest:request delegate:connectionStateHandler] autorelease];
}

我已经实现了所有必需的委托方法，如前所述，它通常正常工作。如果有人能给我任何关于除了线程，连接数和错误URL以外的其他问题的任何想法，我会非常感谢它！

提前感谢任何评论者

编辑：

我在ConnectionStateHandler对象中实现了以下委托方法（每个方法都有登录以显示它们何时被调用，但是它们在极少数情况下没有被调用）：

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error 
- (NSURLRequest *)connection: (NSURLConnection *)inConnection willSendRequest:(NSURLRequest *)inRequest redirectResponse: (NSURLResponse *)inRedirectResponse;
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
- (void)connectionDidFinishLoading:(NSURLConnection *)connection

未调用NSURLConnection委托

0 个答案: