Avoid dismiss displayActivityIndicator() during operation

[MickaelCruzDB]

Hi! In my project I'm using displayActivityIndicator() in order to wait during a sync/download. I would like to avoid that the user can dismiss the download and close the activity indicator.
My idea was to insert self.view.isUserInteractionEnabled = false like the example below. However it doesn't work I can dismiss the item. Any idea ? Thanks a lot in advance!

        self.page.actionHandler = { (item: PageBulletinItem) in
            item.manager?.displayActivityIndicator()
            self.view.isUserInteractionEnabled = false
            iControl.ICSes.login(user: "xxxx", pass: "xxx") { (loginStatus) in
                switch loginStatus {
                case .online:
                    iControl.ICSes.synchronize { (synchronizeStatus, error) in
                        if synchronizeStatus {
                            //Two next lines avoid to have multiple refresh buttons iterations
                            self.refreshMode.removeFromSuperview()
                            self.collectionView?.reloadSections(IndexSet(0 ..< 1))
                            
                            self.collectionView.reloadData()
                            
                            self.page.nextItem = BulletinDataSource.makeCompletionPage()
                            
                            item.manager?.displayNextItem()
                            self.view.isUserInteractionEnabled = true
                            self.tipView?.dismiss()
                            self.refreshMode.stop()
                            
                        } else { NSLog("Error: \(error!.stringValue)") }
                    }
                case .local: break
                case .none: break
                }
            }
        }

[MickaelCruzDB]

I'm stupid..
self.page.isDismissable = true is already made for this...