send date to server and get a string back - ios

Question

I'm sending to my server user detail and it is supposed to return a user id as a string,
the data received at my server bat I can get the string.
The code:
NSString *urlStr = [NSString stringWithFormat:#"url/////api/%#/%#",
[Email.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
[Password.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
nil];
NSString *content = #"field1=42&field2=Hello";
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:urlStr]];
[request setHTTPMethod:#"GET"];
[request setHTTPBody:[content dataUsingEncoding:NSISOLatin1StringEncoding]];
[NSURLConnection connectionWithRequest:request delegate:self];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
if (connection) {
NSLog(#"good conection");
[_receivedData appendData:_data];
NSString *DataString = [[NSString alloc] initWithData:_receivedData encoding:NSUTF8StringEncoding];
NSLog(#"foo1: %#", DataString);
NSLog(#"foo2: %#", _receivedData);
}
2014-01-03 22:27:57.322 App[962:70b] foo1:
2014-01-03 22:27:57.323 App[962:70b] foo2: (null)

Answer 1

Implement following NSURLConnection delegate to fetch data asynchronously.
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
// A response has been received, this is where we initialize the instance var you created
// so that we can append data to it in the didReceiveData method
// Furthermore, this method is called each time there is a redirect so reinitializing it
// also serves to clear it
_responseData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
// Append the new data to the instance variable you declared
[_responseData appendData:data];
}
- (NSCachedURLResponse *)connection:(NSURLConnection *)connection
willCacheResponse:(NSCachedURLResponse*)cachedResponse {
// Return nil to indicate not necessary to store a cached response for this connection
return nil;
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
// The request is complete and data has been received
// You can parse the stuff in your instance variable now
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
// The request has failed for some reason!
}