How to wait response and parse XML done in afnetworking iOS - iphone

Question

I want to wait until server reponse and parse XML done, then call another function. How can i do that? I used this code to send request to server and use NSXMLParser to parse XML response.
NSURL *url1 = [NSURL URLWithString:#"linkserver"];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL: url1] ;
NSDictionary *params1 = #{
#"a" : vd;
#"b" : #"all"
};
NSMutableURLRequest *afRequest = [httpClient requestWithMethod:#"GET" path:nil parameters:params1] ;
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:afRequest];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"Success");
NSString * parsexmlinput = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
[self parseXMLFile:parsexmlinput];// parse xml
[self getItemFromStatus];// wait to call another function at here???
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"error: %#", error);
}
];
[httpClient enqueueHTTPRequestOperation:operation];
}
Please give me any suggestion. Thanks much

Answer 1

You have to make your request synchronous.
refer code something like:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"https://api.twitter.com/1.1/friends/ids.json?"]
cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData
timeoutInterval:10];
[request setHTTPMethod: #"GET"];
NSError *requestError;
NSURLResponse *urlResponse = nil;
NSData *response1 = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&requestError];

Answer 2

check this tutorial Ray Wenderlich using AFnetworking.
Using blocks and callbacks
- (IBAction)xmlTapped:(id)sender{
NSString *weatherUrl = [NSString stringWithFormat:#"%#weather.php?format=xml",BaseURLString];
NSURL *url = [NSURL URLWithString:weatherUrl];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFXMLRequestOperation *operation =
[AFXMLRequestOperation XMLParserRequestOperationWithRequest:request
success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {
XMLParser.delegate = self;
[XMLParser setShouldProcessNamespaces:YES];
[XMLParser parse];
}
failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSXMLParser *XMLParser) {
UIAlertView *av = [[UIAlertView alloc] initWithTitle:#"Error Retrieving Weather"
message:[NSString stringWithFormat:#"%#",error]
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[av show];
}];
[operation start];
}

Answer 3

You can do it in synchronous way...
NSURLResponse *response = nil;
NSError *error = nil;
NSURL *url = [NSURL URLWithString:urlStr];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
httpClient.parameterEncoding = AFFormURLParameterEncoding;
NSMutableURLRequest *request = [httpClient requestWithMethod:#"POST" path:[url path] parameters:params];
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString * parsexmlinput = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
if(error) {
errorCallback(error, nil);
} else {
//parse the xml here
}
OR
You can achive it by adding [operation waitUntilFinished],after it's added to the operation queue.Refer this==>Can AFNetworking return data synchronously (inside a block)?
OR
EDIT: In case you don't want to use the AFNetworking library.I prefer this way.
NSString *action_Post =[[NSString alloc] initWithFormat:#"authToken=%#",theMutableString];
NSURL *action_Url =[NSURL URLWithString:#"ur url here"];
NSData *action_PostData = [action_Post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *action_postLength = [NSString stringWithFormat:#"%d", [action_PostData length]];//your parameter to be posted here
NSMutableURLRequest *action_Request = [[NSMutableURLRequest alloc] init];
[action_Request setURL:action_Url];
[action_Request setHTTPMethod:#"POST"];
[action_Request setValue:action_postLength forHTTPHeaderField:#"Content-Length"];
[action_Request setValue:#"application/xml" forHTTPHeaderField:#"Accept"];
//[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[action_Request setHTTPBody:action_PostData];
NSURLResponse *action_response;
NSData *action_Result = [NSURLConnection sendSynchronousRequest:action_Request returningResponse:&action_response error:&error];
if (!action_Result)
{
NSLog(#"Error");
}
else
{
//Parse your xml here
//call ur function
}
Modify it according to your GET/PUT methods.But i suggest you to go for POST method,as it is refered to be as secured one.