How to identify WHICH NSURLConnection did finish loading when there are multiple ones?

iphone, nsurlconnection, uiviewcontroller, xcode

Solution

You keep pointers to both connections in the delegate, and compare these to the `connection` parameter in `connection:didReceiveData:` and `connectiondidFinishLoading:`

For example:

@interface Foo : NSObject {
    NSURLConnection *connection1;
    NSURLConnection *connection2;
}

and

connection1 = [NSURLConnection connectionWithRequest:request1 delegate:self];
connection2 = [NSURLConnection connectionWithRequest:request2 delegate:self];

and

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    if(connection == connection1) {
        // Connection 1
    } else if(connection == connection2) {
        // Connection 2
    }
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    if(connection == connection1) {
        // Connection 1
    } else if(connection == connection2) {
        // Connection 2
    }
}

Problem

Multiple NSURLConnections being started (in a single UIViewController) to gather different kinds of data. When they return (-connectionDidFinishLoading) I wanna do stuff with the data, depending on the type of data that has arrived. But one prob, HOW DO I KNOW WHICH NSURLConnection returned? I need to know so I can take action specific to the type of data that came. (Eg. display a twitter update if it was the twitter xml data)(Eg. display an image if it was a photo) How do people usually solve this?

Original source