pipe理两个NSURLConnection

我想从两个不同的kml文件做两个asynchronous请求，所以我先设置了两个请求：

NSString *server1URL = [NSString stringWithFormat:...]; NSMutableURLRequest *firstRequest =[NSMutableURLRequest requestWithURL:[NSURL URLWithString:server1URL]]; [firstRequest setHTTPMethod:@"GET"]; NSURLConnection *AConnection = [NSURLConnection connectionWithRequest:firstRequest delegate:self]; NSString *server2URL = [NSString stringWithFormat:...]; NSMutableURLRequest *secondRequest =[NSMutableURLRequest requestWithURL:[NSURL URLWithString:server2URL]]; [secondRequest setHTTPMethod:@"GET"]; NSURLConnection *BConnection = [NSURLConnection connectionWithRequest:secondRequest delegate:self]; 

然后我启动NSMutableData我将使用：

 AResponseData = [[NSMutableData alloc] init]; BResponseData = [[NSMutableData alloc] init]; 

然后，我提到这个post，并做到这一点：

 connectionToInfoMapping = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); CFDictionaryAddValue(connectionToInfoMapping, AConnection, [NSMutableDictionary dictionaryWithObject:AResponseData forKey:@"receivedData"]); CFDictionaryAddValue(connectionToInfoMapping, BConnection, [NSMutableDictionary dictionaryWithObject:BResponseData forKey:@"receivedData"]); 

好的，那么有代表：

 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { const NSMutableDictionary *connectionInfo = CFDictionaryGetValue(connectionToInfoMapping, connection); [[connectionInfo objectForKey:@"receivedData"] appendData:data]; } 

因此，我可以将数据附加到与连接匹配的正确的NSMutableData。

现在在- (void)connectionDidFinishLoading:(NSURLConnection *)connection ，我想要“如果完成，做到这一点，如果B完成，做到这一点”，我的问题是，我该怎么做？

Answer 1

 - (void)connectionDidFinishLoading:(NSURLConnection *)connection{ if( [connection isEqual: AConnection] ){ // do connection A stuff } else if( [connection isEqual: BConnection] ){ // do connection B stuff } } 

Answer 2

使用GCD和sendSynchronousRequest：请求，它们将在后台运行。

例：

 dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); dispatch_async(queue, ^{ NSURLRequest *request = [NSURLRequest requestWithURL:url1]; NSURLResponse *response; NSError *error; NSData *data1 = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; // do something with the data }); dispatch_async(queue, ^{ NSURLRequest *request = [NSURLRequest requestWithURL:url2]; NSURLResponse *response; NSError *error; NSData *data2 = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; // do something with the data }); 

Answer 3

如何为每个连接分配标签，并通过if / else或connectionDidFinishLoading中的开关检查标签？