I am using this code for loging to apps. but i don't know how to call logout function in xcode using this iOS/iPhone logout

- (IBAction)btnLogOut:(id)sender {
    PageViewController2 *view2 = [[PageViewController2 alloc] initWithNibName:nil bundle:nil];
    [self presentViewController:view2 animated:NO completion:NULL];
}

- (IBAction)Logout:(id)sender
{
    Vendor_Login *logout = [[Vendor_Login alloc]initWithNibName:nil bundle:nil];
   // [self presentedViewController:logout animated:NO completion:NULL];
    [self.slideMenuContainer setTopContentViewController:logout];
    [self.slideMenuContainer closeMenu];
   // [self.navigationController pushViewController:logout animated:YES];
   }