Im trying to implement CometChat in my swift application. I managed to import the Objective-c framework successfully via a bridging header. But now I'm stuck trying to call Objective-C methods from swift.

This is the method from the interface i want to call:

```
- (void)loginWithURL:(NSString *)siteURL
            username:(NSString *)username
            password:(NSString *)password
             success:(void(^)(NSDictionary *response))success
             failure:(void(^)(NSError *error))failure;

```

And this is how the method is called from Objective-C:

```
 [cometChat loginWithURL:@"localhost/cometchat/" username:usernameTextField.text password:passwordTextField.text success:^(NSDictionary *response) {

                    NSLog(@"SDK log : Username/Password Login Success %@",response);

                    [self handleLogin];

                } failure:^(NSError *error) {

                    NSLog(@"SDK log : Username/Password Login Error%@",error);

                    [self handleLoginError:@[@0,error]];

                }];

```

So far i have this:

```
 cometChat.loginWithURL("localhost/cometchat/", username: EmailField.text, password: PasswordField.text){
            (success: [NSDictionary], failure:NSError) in {

            println("did i make it here?")

            }

    }

```

The problem is, it says that there is missing argument "success", but its a mystery to me how it can be an argument, when it clearly returns the response. I want to know how to put together this method call. I also used the **objectivec2swift** converter, but it wasn't any help. Also, i have no clue what the @ means before the **@[@0,error]**

I know its a beginners question, but i already wasted a whole day on this, since i couldn't find any tutorials on how to call such "complex" Obj-C methods from swift.