> ## Documentation Index
> Fetch the complete documentation index at: https://cometchat-013b37f0.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Leave A Group

## Leave a Group

In order to stop receiving updates and messages for any particular joined group, you will have to leave the group using the `leaveGroup()` method.

<Tabs>
  <Tab title="Swift">
    ```swift theme={null}
    let guid = "cometchat-guid-11";

    CometChat.leaveGroup(GUID: guid, onSuccess: { (response) in

    	print("Left group successfully.")

    }) { (error) in

      print("Group leaving failed with error:" + error!.errorDescription);
    }
    ```
  </Tab>

  <Tab title="Objective C">
    ```objc theme={null}
    NSString *guid = @"cometchat-guid-101";

    [CometChat leaveGroupWithGUID:guid onSuccess:^(NSString * response) {

        NSLog(@"Left group successfully. %@",response);

    } onError:^(CometChatException * error) {

        NSLog(@"Group leaving failed with error: %@",[error errorDescription]);
    }];
    ```
  </Tab>
</Tabs>

| Parameter | Description                                  |
| --------- | -------------------------------------------- |
| GUID      | The UID of the group you would like to leave |

Once a group is left, the user will not receive any updates or messages pertaining to the group.

## Real-time Leave Group Event

*In other words, as a member of a group, how do I know if someone has left it?*

If a user leaves any group, the members of the group receive a real-time event in the `onGroupMemberLeft()` method of the `CometChatGroupDelegate`. In order to receive user Events, you must add protocol conformance `CometChatGroupDelegate` as shown below :

<Tabs>
  <Tab title="Swift">
    ```swift theme={null}
    extension AppDelegate: CometChatGroupDelegate {

      func onGroupMemberLeft(action: ActionMessage, leftUser: User, leftGroup: Group) {

        print("\(leftUser.name) left the group \(leftGroup.name).")
      }
    }
    ```
  </Tab>

  <Tab title="Objective C">
    ```objc theme={null}
    @interface ViewController ()<CometChatGroupDelegate>

    @end

    @implementation ViewController

    - (void)viewDidLoad {
        [super viewDidLoad];

        [CometChat setGroupdelegate:self];

    }

    - (void)onGroupMemberLeftWithAction:(ActionMessage *)action leftUser:(User *)leftUser leftGroup:(Group *)leftGroup {
        //user was left
    }
    ```
  </Tab>
</Tabs>

Do not forget to set your view controller as a CometChat delegate probably in `viewDidLoad()` as `CometChat.groupdelegate = self`

## Missed Group Member Left Events

*In other words, as a member of a group, how do I know if someone has left it when my app is not running?*

When you retrieve the list of previous messages if a member has left any group that the logged-in user is a member of, the list of messages will contain an `Action` message. An `Action` message is a sub-class of `BaseMessage` class.

For the group member left event, in the `Action` object received, the following fields can help you get the relevant information-

1. `action` - `left`
2. `actionBy` - User object containing the details of the user who left the group
3. `actionFor` - Group object containing the details of the group the user has left