c# - Prism for Xamarin, dependency failed for INavigationService -

i working on sample xamarin.forms app ios, using prism.

but when tried use inavigationservice in viewmodel, failed saying dependency failed interface inavigationservice

i dont know wrong doing, how can around or bug in inavigationservices injection.

thanks divikiran ravela

heres code

    public app()     {         // root page of application         prism = new prismbootstrap();         prism.run(this);     }      public class prismbootstrap : unitybootstrapper {     protected override page createmainpage()     {         return new navigationpage(container.resolve<homepage>());     }      protected override void registertypes()     {         container.registertypefornavigation<homepage, homepageviewmodel>();     } }       public class homepage : contentpage     {          public homepageviewmodel viewmodel { get; set; }      public homepage()     {         viewmodel = app.prism.container.resolve<homepageviewmodel>();         content = new stacklayout         {             children = {                 new label { text = "hello contentpage" }             }         };     } }   public class homepageviewmodel : bindablebase {     private readonly inavigationservice _navigationservice;      public homepageviewmodel(inavigationservice navigationservice)     {         _navigationservice = navigationservice; //fails here     } } 

the inavigationservice depends on use of viewmodellocator. if don't use it, service cannot injected. instead of manually resolving vm, use viewmodellocator.autowireviewmodel attached property. besides, don't want using container that. want 1 composition root when using di.

also, recommend using latest 6.1 preview. has ton of navigation improvements.