How to fetch data using NSUrl session in objective-C? - objective-c

Question

I am trying to fetch JSON data and parse it using NSUrl session but getting null every time - Also in addition to that i want o show all data in table view
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:#"https://dl.dropboxusercontent.com/s/2iodh4vg0eortkl/facts.json"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request addValue:#"text/plain" forHTTPHeaderField:#"Content-Type"];
[request addValue:#"text/plain" forHTTPHeaderField:#"Accept"];
[request setHTTPMethod:#"GET"];
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: #"Value", #"Key", nil];
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request setHTTPBody:postData];
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(#"Resopnse == %#",response);
if (response != nil) {
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSLog(#"JSon dict === %#",jsonDict);
}
}];
[postDataTask resume];
May I know what i am doing wrong is anything other good way to do same?

Answer 1

Try following code.
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:#"https://dl.dropboxusercontent.com/s/2iodh4vg0eortkl/facts.json"]];
[request setHTTPMethod:#"GET"];
[request addValue:#"text/plain" forHTTPHeaderField:#"Content-Type"];
[request addValue:#"text/plain" forHTTPHeaderField:#"Accept"];
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
[[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
NSData * responseData = [requestReply dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
NSLog(#"requestReply: %#", jsonDict);
}] resume];

Answer 2

Please use the below code for the same. Hope it will solve your problem.
NSString *strUrl = [NSString stringWithFormat:yourUrl];
NSURL *url = [NSURL URLWithString:strUrl];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response,
NSData *data, NSError *connectionError)
{
if (data.length > 0 && connectionError == nil)
{
NSDictionary *dicResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];
NSLog(#"%#",dicResponse);
}
}];