AFNetworking Empty Request Body - ios

Question

I am trying to make a simple request with the new AFNetworking 2.0 release and I cannot seem to get it to post. I get a response back from the server "Expecting text/json or application/json body" but according to the documentation on AFNetworking's GitHub page, I'm doing everything as I should be. It's also worth mentioning that it appears the operation.request.HTTPBody in the last line of my code always appears to be nil.
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *request = #{#"email": self.email.text, #"password": self.password.text};
[manager POST:login parameters:request constructingBodyWithBlock:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"DONE!");
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failed to log in: %#", operation.responseString);
NSLog(#"Here's the request: %#", operation.request.HTTPBody);
}];

Answer 1

According to the documentation
POST:parameters:constructingBodyWithBlock:success:failure
is for multipart POST requests and its default serialized is not JSON.
Creates and runs an AFHTTPRequestOperation with a multipart POST request.
You want to use
POST:parameters:success:failure:
instead, as follows
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *request = #{#"email": self.email.text, #"password": self.password.text};
[manager POST:login parameters:request success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"DONE!");
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failed to log in: %#", operation.responseString);
}];

Answer 2

Try
- (AFHTTPRequestOperation *)POST:(NSString *)URLString parameters:(NSDictionary *)parameters success:(void ( ^ ) ( AFHTTPRequestOperation *operation , id responseObject ))success failure:(void ( ^ ) ( AFHTTPRequestOperation *operation , NSError *error ))failure
This method don't require the constructBody block. I don't think the block can be nil.