iOS NotificationCenter - show and hide splash

[triffek]

I have this code:

MainViewControler:

override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(true)
        // register  notification
        NotificationCenter.default.addObserver(self, selector: #selector(MainViewControler.StartUpdatingSplash), name: NSNotification.Name("updating.salestool.bla.pl"), object: nil)
    }

    @objc func StartUpdatingSplash() {
    DispatchQueue.global().async {
        EZLoadingActivity.show("LoadingMessage4".localized(), disableUI: true)
    }
    print("##### NOTIFICATION STEP: 1")
}

@objc func FinishUpdatingSplash() {
    DispatchQueue.global().async {
        EZLoadingActivity.hide()
    }
    NotificationCenter.default.removeObserver(self, name: Notification.Name("updating.salestool.bla.pl"), object: nil)
    print("##### NOTIFICATION STEP: 2")
}

and Config.swift:

NotificationCenter.default.post(name: NSNotification.Name("updating.salestool.bla.pl"), object: nil)

let dispatchImagesGroup = DispatchGroup()
                dispatchImagesGroup.enter()
                DispatchQueue.global().async {
                    self.downloadImages(toDownloads: jsonData, savedURL: FileFolders.GET_PHOTO.rawValue, parametr: FileFolders.GET_PHOTO.rawValue)
                    dispatchImagesGroup.leave()
                }

                dispatchImagesGroup.enter()
                DispatchQueue.global().async {
                    self.downloadImages(toDownloads: jsonData, savedURL: FileFolders.GET_INSPIRATION_PHOTO.rawValue , parametr: FileFolders.GET_INSPIRATION_PHOTO.rawValue)
                    dispatchImagesGroup.leave()
                }

                dispatchImagesGroup.enter()
                DispatchQueue.global().async {
                    self.downloadImages(toDownloads: jsonData, savedURL: FileFolders.GET_PACKSHOT.rawValue , parametr: FileFolders.GET_PACKSHOT.rawValue)
                    dispatchImagesGroup.leave()
                }


                dispatchImagesGroup.enter()
                DispatchQueue.global().async {
                    self.downloadImages(toDownloads: jsonData, savedURL: (AppGlobalManager.sharedManager.loggedUser?.selectedLanguage)! + "/" + FileFolders.GET_TIPS_SLIDES.rawValue, parametr: FileFolders.GET_TIPS_SLIDES.rawValue)
                    dispatchImagesGroup.leave()
                }

                dispatchImagesGroup.enter()
                DispatchQueue.global().async {
                    self.downloadImages(toDownloads: jsonData, savedURL: (AppGlobalManager.sharedManager.loggedUser?.selectedLanguage)! + "/" + FileFolders.GET_LEAFLETS_SLIDES.rawValue, parametr: FileFolders.GET_LEAFLETS_SLIDES.rawValue)
                    dispatchImagesGroup.leave()
                }

                dispatchImagesGroup.enter()
                DispatchQueue.global().async {
                    self.downloadImages(toDownloads: jsonData, savedURL: (AppGlobalManager.sharedManager.loggedUser?.selectedLanguage)! + "/" + FileFolders.GET_CONCEPTS_SLIDES.rawValue, parametr: FileFolders.GET_CONCEPTS_SLIDES.rawValue)
                    dispatchImagesGroup.leave()
                }

                dispatchImagesGroup.enter()
                DispatchQueue.global().async {
                    self.downloadLeafletsPDF(toDownloads: jsonData, savedURL: (AppGlobalManager.sharedManager.loggedUser?.selectedLanguage)! + "/" + FileFolders.GET_LEAFLETS_PDF.rawValue)
                    dispatchImagesGroup.leave()
                }

                dispatchImagesGroup.notify(queue: .global()) {
                NotificationCenter.default.addObserver(self, selector: #selector(MainViewControler.FinishUpdatingSplash), name: NSNotification.Name("updating.salestool.bla.pl"), object: nil)
            }

StartUpdatingSplash - runs the splash.

Function downloadImages - runs the thread for downloading photos from the internet. The application after launch displays splash (EZLoadingActivity) and then downloads the photos.

I would like to hide EZLoadingActivity (EZLoadingActivity.hide) after finishing all these threads used to download photos, for example by running the FinishUpdatingSplash () function. How can I do this?

My notificationcenter correctly displays the splash - I have a problem just hide it

 

[PhoneyDeveloper]

You should only be updating UI on the main thread, not the global background thread. In the place where you ar registering for the Finish notification you should post the Finish notification (on the main thread).