ios - Show alert after app start -


i have problem showing alert after application start. using notification center observe notification error , find current visible view controller show alert on it. work when handle error after start app, if want show error after start app, not happen. code app delegate:

func listenforrealmerrornotification() {     notificationcenter.default.addobserver(forname: mydatamodeldidfailnotification, object: nil, queue: operationqueue.main, using: { notification in         let alert = uialertcontroller(title: nslocalizedstring("internal alert", comment: "internal error header"),                                       message: nslocalizedstring("there error while working whith data", comment: "internal error description") + "\n\n" + nslocalizedstring("press ok terminate app. sorry inconvenience", comment: "internal error excuses"),                                       preferredstyle: .alert)         let action = uialertaction(title: nslocalizedstring("ok", comment: "agree button on internal error"), style: .default, handler: {_ in             let exeption = nsexception(name: nsexceptionname.internalinconsistencyexception, reason: "realm error", userinfo: nil)             exeption.raise()         })         alert.addaction(action)         print("***observe error")         self.viewcontrollerforshowingalert().present(alert, animated: true, completion: nil)     }) } func viewcontrollerforshowingalert() -> uiviewcontroller {     let rootviewcontroller = self.window!.rootviewcontroller!     return topviewcontroller(from: rootviewcontroller) }  func topviewcontroller(from controller: uiviewcontroller) -> uiviewcontroller {     if controller uinavigationcontroller {         return topviewcontroller(from: (controller as! uinavigationcontroller).visibleviewcontroller!)     }     if controller uitabbarcontroller {         return topviewcontroller(from:(controller as! uitabbarcontroller).selectedviewcontroller!)     }     if let presentedviewcontroller = controller.presentedviewcontroller {         return topviewcontroller(from:presentedviewcontroller)     }      return controller }

and code post notification: 

func fatalrealmerror(_ error: error) { print("***fatal error database: \(error)") crashlytics.sharedinstance().recorderror(error) notificationcenter.default.post(name: mydatamodeldidfailnotification, object: nil) }

update: initiating data source in delegate:

    func initialdatasource() {     {         datasource = try userdatasource()     }     catch let error nserror {         fatalrealmerror(error)     } }

and here have set observer:

func application(_ application: uiapplication, didfinishlaunchingwithoptions launchoptions: [uiapplicationlaunchoptionskey: any]?) -> bool {     customizeappearance()      listenforrealmerrornotification()     initialdatasource()     let rootviewcontroller = window?.rootviewcontroller as! uinavigationcontroller     let rootcontentcontroller = rootviewcontroller.viewcontrollers[0] as! yourfoodviewcontroller     rootcontentcontroller.datasource = datasource      fabric.with([crashlytics.self])     return true }


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer
Read more

jquery - Responsive Navbar with Sub Navbar -

good day, forgive me nav vocabulary not best. if question confusing apologize. i'm working on navigation bar needs centered on page @ 768px , above. items in nav open (or perhaps toggle) subnav lives directly below. these nav should appear centered on page. i have been able work through responsive portion of nav bar, having main items align vertically , sub nav menu of each item roll out below, , gave them indent separation. working well. however, issue not responsive side, behavior @ width greater 768px. happens toggling menu's sub navigation pushes other main items down page below sub nav. here's code: $(document).ready(function () { //stick in fixed 100% height behind navbar don't wrap $('#slide-nav.navbar-inverse').after($('<div class="inverse" id="navbar-height-col"></div>')); $('#slide-nav.navbar-default').after($('<div id="navbar-height-col"></d
Read more