AFNetworking example

example.m

AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithBaseURL:[NSURL URLWithString:@"https://maps.googleapis.com"]];

manager.responseSerializer = [AFJSONResponseSerializer serializer];

NSDictionary *param = @{@"address": @"str"};

[manager GET:@"/maps/api/geocode/json"
         parameters:param
            success:^(NSURLSessionDataTask * _Nonnull task, id  _Nonnull responseObject) {
                // Map your model objects with responseObject
            }
            failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
                // Error handling
            }];