How to call webService Using NSURLConnection in ios - ios

Question

Actually I am using now JSON classes for calling web-services but now i want to call that webservice using NSURLConnection any one provide me code for that.
Please provide me details of frameworks what i have to import.
Thank you in advance.

Answer 1

NSURL *url = [NSURL URLWithString:stringurl];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[NSURLConnection sendAsynchronousRequest:urlRequest queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
{
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSLog(#"%#",dictionary);
}];
You Can use this.

Answer 2

You can Do like this using Synchronous :
NSURL *url=[NSURL URLWithString:urlString];
NSURLRequest *req=[NSURLRequest requestWithURL:url];
NSData *data=[NSURLConnection sendSynchronousRequest:req returningResponse:nil error:nil];
NSString *response=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *dd=[response JSONValue];
OR Using Delegate Method
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];
NSURLResponse *response = nil;
// Create url connection and fire request
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
#pragma mark NSURLConnection Delegate Methods
- (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
NSString* newStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSError* error;
NSDictionary* json = [NSJSONSerialization JSONObjectWithData:data
options:kNilOptions
error:&error];
// NSArray* latestLoans = [json objectForKey:#"loans"];
NSLog(#"json: %#", json);
[_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!
// Check the error var
}

Answer 3

Use below code forrcalling SOAP web service (POST) :
-(NSString *)posturl:(NSString *)url withpoststring:(NSString *)postString {
NSString *post = postString;
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%lu", (unsigned long)[postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
NSString *URL = url;
NSLog(#"%#", URL);
NSLog(#"%#",post);
[request setURL:[NSURL URLWithString:URL]];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSError *error;
NSURLResponse *response;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *data = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
if ([data isEqualToString:#""]) {
} else {
data = stringByStrippingHTML(data);
}
return data;
}