> ## Documentation Index
> Fetch the complete documentation index at: https://cometchat-22654f5b-docs-angular-v5-docs-update.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# Leave A Group
> Learn how to leave a group and receive real-time events when members leave using the CometChat iOS SDK.
```swift theme={null}
// Leave a group
CometChat.leaveGroup(GUID: "GUID", onSuccess: { response in }, onError: { error in })
// Listen for member left events
// Conform to CometChatGroupDelegate
func onGroupMemberLeft(action: ActionMessage, leftUser: User, leftGroup: Group) { }
```
Leave a group to stop receiving messages and updates from it. Once you leave, you'll need to rejoin to participate again.
Group owners cannot leave without first transferring ownership to another member. See [Transfer Group Ownership](/sdk/ios/transfer-group-ownership).
## Leave a Group
Use `leaveGroup()` to leave a group.
| Parameter | Description |
| --------- | --------------------------------------------- |
| `GUID` | The GUID of the group you would like to leave |
```swift theme={null}
let guid = "cometchat-guid-11"
CometChat.leaveGroup(GUID: guid, onSuccess: { (response) in
print("Left group successfully.")
}, onError: { (error) in
print("Group leaving failed with error:" + error!.errorDescription)
})
```
```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]);
}];
```
Once a group is left, the user will no longer receive any updates or messages pertaining to the group.
## Real-time Group Member Left Events
Register a `CometChatGroupDelegate` to receive events when members leave.
```swift theme={null}
class ViewController: UIViewController, CometChatGroupDelegate {
override func viewDidLoad() {
super.viewDidLoad()
CometChat.groupdelegate = self
}
func onGroupMemberLeft(action: ActionMessage, leftUser: User, leftGroup: Group) {
print("\(leftUser.name ?? "") left the group \(leftGroup.name ?? "").")
}
}
```
```objc theme={null}
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[CometChat setGroupdelegate:self];
}
- (void)onGroupMemberLeftWithAction:(ActionMessage *)action leftUser:(User *)leftUser leftGroup:(Group *)leftGroup {
// User left the group
}
@end
```
Set delegate in `viewDidLoad()`: `CometChat.groupdelegate = self`. Remove delegate when view is dismissed to avoid memory leaks.
## Missed Group Member Left Events
When fetching message history, leave events appear as [`Action`](/sdk/reference/messages#action) messages (a subclass of [`BaseMessage`](/sdk/reference/messages#basemessage)) with:
| Field | Value/Type | Description |
| ----------- | ---------------------------------------- | ----------------------- |
| `action` | `"left"` | The action type |
| `actionBy` | [`User`](/sdk/reference/entities#user) | The user who left |
| `actionFor` | [`Group`](/sdk/reference/entities#group) | The group that was left |
***
## Next Steps
Join public or password-protected groups
Permanently delete a group
Remove or ban members from a group
Fetch and filter the list of groups