objective c - Adding a CarPlay UI -


i working on current iphone audio app supported in carplay. got approved apple , received development entitlement, , watched video "enabling app carplay"(https://developer.apple.com/videos/play/wwdc2017/719/). in video there piece of swift code demonstrating how add carplay ui:

func updatecarwindow()   {       guard let screen = uiscreen.screens.first(where:      { $0.traitcollection.userinterfaceidiom == .carplay })       else       {           // carplay not connected           self.carwindow = nil;           return       }        // carplay connected       let carwindow = uiwindow(frame: screen.bounds)       carwindow.screen = screen       carwindow.makekeyandvisible()       carwindow.rootviewcontroller = carviewcontroller(nibname: nil, bundle: nil)       self.carwindow = carwindow }

i re-wrote objective-c version following:

- (void) updatecarwindow   {       nsarray *screenarray = [uiscreen screens];        (uiscreen *screen in screenarray)       {                 if (screen.traitcollection.userinterfaceidiom == uiuserinterfaceidiomcarplay)  // carplay connected.         {               // screen's bounds can create window of correct size.               cgrect screenbounds = screen.bounds;                uiwindow *tempcarwindow = [[uiwindow alloc] initwithframe:screenbounds];               self.carwindow.screen = screen;               [self.carwindow makekeyandvisible];                // set initial ui window.               uistoryboard *storyboard = [uistoryboard storyboardwithname:@"main" bundle:nil];               uiviewcontroller *rootviewcontroller = [storyboard instantiateviewcontrollerwithidentifier:@"vc"];                self.carwindow.rootviewcontroller = rootviewcontroller;               self.carwindow = tempcarwindow;                // show window.               self.carwindow.hidden = no;               return;          }       }       // carplay not connected.     self.carwindow = nil;  }

however found property "screens" of uiscreen return 1 element (the main screen), no matter when testing on real device or simulator. when app running on simulator or real car carplay system, app blank , said "unable connect "my app name"" (see image below). viewcontroller has simple uilabel though.

enter image description here

my question is: should make app connected carplay? is, how should obtain screen has uiuserinterfaceidiomcarplay idiom, not main screen? lot in advance.

carplay audio apps controlled mpplayablecontentmanager. required implement mpplayablecontentdelegate , mpplayablecontentdatasource protocol in order connect carplay. ui controlled carplay - need feed data tabs+tables (datasource) , respond playable items (delegate).


Comments

Post a Comment

Popular posts from this blog

networking - Vagrant-provisioned VirtualBox VM is not reachable from Ubuntu host -

this question exact duplicate of: puphpet/vagrant: unable access lamp vm ip address 1 answer i following basic vagrant tutorial , vagrant provisions box on ubuntu without complaining. moreover, can vagrant ssh vm. however, vm not reachable host: it's not possible ping it's ip address. what have achieved: installed virtualbox (5.1.24 r117012 (qt5.5.1)) , vagrant (1.9.7) onto ubuntu (16.04.2 lts) machine. provisioned vm vagrant up , vagrant finishes job , not complain. vagrant ssh works. i have manually installed lighttpd on guest vm , can ping/curl address: localhost within guest vm. this when trying reach guest vm host: ~/tmp/myfirstvagrantproject$ ping 172.22.22.22 ping 172.22.22.22 (172.22.22.22) 56(84) bytes of data. ... icmp_seq=4 destination net unreachable ... 171 packets transmitted, 0 received, +21 errors, 100% packet loss, time 173
Read more

c# - ASP.NET Core - There is already an object named 'AspNetRoles' in the database -

i'm receiving error applicationdbcontext database when trying update entity framework. i've googled, tried fixes here on so, no avail. i'm deleting database each time make change, once deploy, not option. here's error: pm> update-database -context applicationdbcontext system.data.sqlclient.sqlexception: there object named 'aspnetroles' in database. @ system.data.sqlclient.sqlconnection.onerror(sqlexception exception, boolean breakconnection, action 1 wrapcloseinaction) @ system.data.sqlclient.tdsparser.throwexceptionandwarning(tdsparserstateobject stateobj, boolean callerhasconnectionlock, boolean asyncclose) @ system.data.sqlclient.tdsparser.tryrun(runbehavior runbehavior, sqlcommand cmdhandler, sqldatareader datastream, bulkcopysimpleresultset bulkcopyhandler, tdsparserstateobject stateobj, boolean& dataready) @ system.data.sqlclient.sqlcommand.runexecutenonquerytds(string methodname, boolean async, int32 timeout, boolean
Read more

ruby on rails - ArgumentError: Missing host to link to! Please provide the :host parameter, set default_url_options[:host], or set :only_path to true -

i have built module in solidus , ruby on rails , try create tests. i trying create integration tests , have error: e error: prescriptionphotostest#test_/prescription_photos_post_endpoint_throws_an_error_when_wrong_params: argumenterror: missing host link to! please provide :host parameter, set default_url_options[:host], or set :only_path true test/integration/prescription_photos_test.rb:6:in `block in ' i read this , this , doesn't make difference. my code returning error on line: @user = factorygirl.create(:user) here code files. prescription_photos_rest.rb require 'test_helper' class prescriptionphotostest < actiondispatch::integrationtest setup spree::auth::config[:confirmable] = false @user = factorygirl.create(:user) end def authenticated_header token = knock::authtoken.new(payload: { sub: @user.id }).token { 'authorization': "bearer #{token}" } end test '/prescription_p
Read more