Issue with AFNetworking - ios

Question

My client webservice send me a result like this:
{"login":{"EMAIL":"none","ID":"none","NOME":"none"}}
So, in AFN doesn't work.
But, if have one more result works:
{"login":[{"EMAIL":"none","ID":"none","NOME":"none"},{"EMAIL":"none","ID":"none","NOME":"none"}]}
My code:
NSDictionary *paramLogin = [NSDictionary dictionaryWithObjectsAndKeys:_txtEmail.text, #"email",_txtSenha.text, #"senha", nil];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:#"http://webservice.info" parameters:paramLogin success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"%#" , responseObject );
for (NSDictionary *retLogin in [responseObject valueForKeyPath:#"login"]) {
nome = [retLogin objectForKey:#"nome"];
email = [retLogin objectForKey:#"email"];
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
why it is like this? or what I've to do ?

Answer 1

Sometimes [responseObject valueForKeyPath:#"login"] returns and array, sometimes it returns a dictionary. You need to test for this.
id loginValue = [responseObject valueForKeyPath:#"login"];
if ([loginValue isKindOfClass:[NSDictionary class]]) {
nome = [loginValue objectForKey:#"nome"];
email = [loginValue objectForKey:#"email"];
} else if ([loginValue isKindOfClass:[NSArray class]]) {
for (NSDictionary *retLogin in [responseObject valueForKeyPath:#"login"]) {
nome = [retLogin objectForKey:#"nome"];
email = [retLogin objectForKey:#"email"];
}
} else {
// ERROR: Unexpected value
}
When you have 1 value, then loginValue is an NSDictionary. It contains {"EMAIL":"none","ID":"none","NOME":"none"}.
When you have more than 1 value, then loginValue is an NSArray. The array contains [<NSDictionary>, <NSDictionary>]. Each of of these dictionaries contains {"EMAIL":"none","ID":"none","NOME":"none"}.

Answer 2

Problem is with your json data structure. It's not consistent.
{"login":{"EMAIL":"none","ID":"none","NOME":"none"}}
Here [responseObject valueForKeyPath:#"login"] is a single NSDictionary object.
But here,
{"login":[{"EMAIL":"none","ID":"none","NOME":"none"},{"EMAIL":"none","ID":"none","NOME":"none"}]}
Here [responseObject valueForKeyPath:#"login"] is an NSArray. So your fast enumeration works.
Best solution is to ask your webservice developer to send an array all the time, even 'login' has a single object. so it should look like this,
{"login": [{"EMAIL":"none","ID":"none","NOME":"none"}]} //notice square brackets
Otherwise you have to modify your code to check for an NSDictionary instead of array when there's only one object.

Answer 3

I suspect the issue is that you aren't retaining the AFHTTPRequestOperationManager object.
Assuming this code is in something like viewDidAppear:
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:...];
Then manager will be destroyed before it has a chance to complete.
Instead add a property and store the manager object in that:
#interface MyViewController ()
#property (nonatomic) AFHTTPRequestOperationManager *manager;
#end
and use:
self.manager = [AFHTTPRequestOperationManager manager];
[self.manager GET:...];

Answer 4

if you are getting response like that than use below code
NSMutableArray *category = [[NSMutableArray alloc]init];
category = [responseObject objectForKey:#"login"];
for(int i = 0; i < [category count]; i++)
{
NSDictionary *dic = [category objectAtIndex:i];
nome = [dic objectForKey:#"nome"];
email = [dic objectForKey:#"email"];
}