Question

我在植入简单的NSURLConnection时遇到了这个奇怪的问题...

方法didReceiveData得到调用，我很高兴尝试追加接收数据，但是... nada！

确实存在一些数据（因为长度表示但是appendData不附加数据！

我开始对这个问题感到头疼，在迟到之前我需要一些帮助： - ）

这里有一些代码可供参考：

我的标题......

@interface ActionViewController : UITableViewController {
 Site *site;

 NSURLConnection *siteConnection;
 NSMutableData *receivedData;
    UIView *waitView;
    UIActivityIndicatorView *activityIndicator;

 int nConnections;
    BOOL fail;
}

我的实施..

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    // Append the new data to receivedData.
 NSLog(@"Received %d bytes of data",[data length]);
    [receivedData appendData:data];
 NSLog(@"Received %d bytes of data",[receivedData length]);
}

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

    NSLog(@"Succeeded! Received %d bytes of data",[receivedData length]);

 [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
 [activityIndicator stopAnimating];
 waitView.hidden = YES;

    // release the connection
    [connection release];
}

控制台输出......

[Session started at 2010-08-21 21:27:55 -0400.]
2010-08-21 21:28:19.263 myApp[2042:207] Received 108 bytes of data
2010-08-21 21:28:19.263 myApp[2042:207] Received 0 bytes of data
2010-08-21 21:28:19.263 myApp[2042:207] Succeeded! Received 0 bytes of data

我不明白！ HELP !!!

BTW，数据是一个简单的xml结果，看起来像这样......

<donnee>0</donnee><donnee>0</donnee><donnee>0</donnee><donnee>1</donnee><donnee>0</donnee><donnee>0</donnee>

Answer 1

好吧，在本网站的另一个问题中得到了我的回答NSMutableData ...忘了初始化这个东西！（代码18或将消息发送到nil的剩余部分是Objective-C的NICE特征）

receivedData = [[NSMutableData alloc] init];

在NSURLConnection的didReceiveData方法中，appendData存在奇怪的问题

1 个答案: