How to use AFNetworking to create JSON array - ios

Question

I am currently trying to create a JSON array like I do here like this:
NSURL *url = [NSURL URLWithString:currentJSON];
NSData *jsonData = [NSData dataWithContentsOfURL:url];
NSError *error = nil;
if (jsonData) {
result = [NSJSONSerialization JSONObjectWithData:jsonData
options:NSJSONReadingMutableContainers
error:&error];
}
Which works fine. Apart from I want it to time out if the internet connection is not great.
So I then wen to AFNetworking where I wrote code like this:
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:currentJSON parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSError *error = nil;
result = [NSJSONSerialization JSONObjectWithData:responseObject
options:NSJSONReadingMutableContainers
error:&error];
[[NSUserDefaults standardUserDefaults] setObject:result forKey:#"All"];
[[NSUserDefaults standardUserDefaults] synchronize];
} failure:^(AFHTTPRequestOperation *operation, NSError *error)
{
result = [[NSUserDefaults standardUserDefaults] mutableArrayValueForKey:#"All"];
}
But this method always runs to a failure How come? What am I doing wrong?

Answer 1

Check that server is sending JSON using correct content type 'application/json'. AFNetowrking checks this out of the box and if receives something else (for example 'text/html'), failure block will be called.
Also AFNetworking does JSON to object parsing out of the box. 'id responseObject' is already the result of '[NSJSONSerialization JSONObjectWithData]'.
If you can't change content type sent by server, you could add that content type to accepted types using following snippet
NSMutableSet *accepted = [NSMutableSet set];
[accepted addObject:#"text/html"];
[accepted addObject:#"application/json"];
manager.responseSerializer.acceptableContentTypes = accepted;

Answer 2

Try this :
NSURL *url = [NSURL URLWithString:string];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
result = (NSDictionary *)responseObject;
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
}];
[operation start];