How to resolve multiple NSURLconnection with separated data - ios

Question

I have 2 separate NSURLConnection.
NSURLConnection * connection_users;
NSURLConnection * connection_cards;
Then i created the data with parameters, etc. and I finish with:
connection_users = [[NSURLConnection alloc] initWithRequest: url_request_users delegate: self startImmediately: YES];
In the delegate method:
- (void) connection: (NSURLConnection *) connection didReceiveData: (NSData *) data
i Checked if the connection is for the connection_users:
if (connection == connection_users) / / do something as an example:
NSDictionary * json_response = [NSJSONSerialization JSONObjectWithData: data options: kNilOptions error: & error];
Use the "data" that came from the method.
Before closing the "if" I create the next connection to "connection_cards", doing the same things
Out of "if" but within the same method I do another "if" to "connection_cards" and do the same thing with JSONObjectWithData.
Only the "data" that comes from the method is always of the first connection.
What is happening differently? For the second connection was initiated then you should receive the "data" corresponding.
Already canceled the first connection before starting the second to see if solved, but no.
How to obtain the "data" correct for second connection?
PS: if you need more codes, please let me know.
EDITED:
As Wain ask
url_request_users = [[NSMutableURLRequest alloc] init];
NSMutableString *post_users = [[NSMutableString alloc] init];
[post_users appendFormat:#"%#", [NSString stringWithFormat:#"email=%#&senha=%#",
[[alert textFieldAtIndex:0] text],
senha_md5]];
[url_request_users setURL:[NSURL URLWithString:WBS_USERS_RECOVER]];
[url_request_users addValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[url_request_users setHTTPMethod:#"POST"];
[url_request_users setHTTPBody:[post_users dataUsingEncoding:NSUTF8StringEncoding]];
connection_users = [[NSURLConnection alloc] initWithRequest:url_request_users delegate:self startImmediately:YES];

Answer 1

For n different connections you will need n different NSMutableData which contains result of related NSURLConnection. A basic example for your question;
NSMutableData *data_users;
NSMutableData *data_cards;
Than on your didRecieveData;
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
if (connection == connection_users) {
[data_users appendData:data];
} else if ( connection == connection_cards) {
[data_cards appendData:data];
}
}
This way you can keep track of your data's and connection's seperately. Remember to clear leftovers for your datas when your connection is over
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
if (connection == connection_users) {
// use data from data_users
NSDictionary * json_response = [NSJSONSerialization JSONObjectWithData:[data_users copy] options: kNilOptions error: & error];
data_users = [[NSMutableData alloc] init]; // clear data users
}
// do the same for cards connection
}
Last thing to do is to allocate your data before you call this function;
url_request_users = [[NSMutableURLRequest alloc] init];
NSMutableString *post_users = [[NSMutableString alloc] init];
[post_users appendFormat:#"%#", [NSString stringWithFormat:#"email=%#&senha=%#",
[[alert textFieldAtIndex:0] text],
senha_md5]];
[url_request_users setURL:[NSURL URLWithString:WBS_USERS_RECOVER]];
[url_request_users addValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[url_request_users setHTTPMethod:#"POST"];
[url_request_users setHTTPBody:[post_users dataUsingEncoding:NSUTF8StringEncoding]];
data_users = [[NSMutableData alloc] init]; // add this line in your code
connection_users = [[NSURLConnection alloc] initWithRequest:url_request_users delegate:self startImmediately:YES];