管理两个 NSURLConnection

我想从两个不同的 kml 文件执行两个异步请求，因此我首先设置两个请求：

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];

然后我初始化NSMutableData我将使用：

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

那么我参考一下this发布并执行此操作：

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

好的，接下来有代表：

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

因此，这样我就可以将数据附加到与连接匹配的正确 NSMutableData 中。

Now in - (void)connectionDidFinishLoading:(NSURLConnection *)connection，我想要“如果A完成，就这样做，如果B完成，就这样做”，我的问题是，我该怎么做？

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