NSURLConnection只下载第567个字节？

Question

我正在尝试下载http://www.vesseltracker.com/earth/vesseltrackerlight.kmz，但没有得到所有零碎。

我想：

NSData *data = [NSData dataWithContentsOfURL: serverURL options: 0 error: &error]; 

无济于事

然后切换到

- (void)startDownloadingURL:(NSURL*) url 
{ 
    // Create the request. 
    NSURLRequest *theRequest = [NSURLRequest requestWithURL:url 
      cachePolicy:NSURLRequestUseProtocolCachePolicy 
      timeoutInterval:60.0]; 

    // create the connection with the request 
// and start loading the data 
NSLog(@"SNNetworkController.startDownloadingURL [%@]", url); 
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; 
if (theConnection) { 
    // Create the NSMutableData to hold the received data. 
    // receivedData is an instance variable declared elsewhere. 
    receivedData = [[NSMutableData data] retain]; 
    } else { 
     // inform the user that the download failed. 
    NSLog(@"SNNetworkController.startDownloadingURL Download failed!"); 
    } 
} 

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
{ 
    // This method is called when the server has determined that it 
    // has enough information to create the NSURLResponse. 

    // It can be called multiple times, for example in the case of a 
    // redirect, so each time we reset the data. 

    // receivedData is an instance variable declared elsewhere. 
    [receivedData setLength:0]; 
} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
{ 
    // Append the new data to receivedData. 
    // receivedData is an instance variable declared elsewhere. 
    [receivedData appendData:data]; 
} 

- (void)connection:(NSURLConnection *)connection 
    didFailWithError:(NSError *)error 
{ 
    // release the connection, and the data object 
    [connection release]; 
    // receivedData is declared as a method instance elsewhere 
    [receivedData release]; 

    // inform the user 
    NSLog(@"SNNetworkController.didFailWithError Download failed! Error - %@", 
      [error localizedDescription]); 
} 

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{ 
    // do something with the data 
    // receivedData is declared as a method instance elsewhere 
    NSLog(@"SNNetworkController.downloadDidFinish Succeeded! Received %d bytes of data",[receivedData length]); 

    // release the connection, and the data object 
    [connection release]; 
    [receivedData release]; 
} 

但我的运气。它总是需要567字节（应该是在4k左右）我认为它可能开始解压缩并失败....

Answer 1

我下载了你用Safari列出的URL，它只有567字节长。您是否将“4k”期望放在Finder列表视图所说的内容上？由于文件分配块大小，该显示仅为近似值......文件的实际字节数显示在该文件的“Get Info ...”窗口后面的括号内。