xamarin - MvxViewController.PresentationAttribute called before ViewModel is loaded -


i have problem xamarin.ios , mvvmcross, need display mvxviewcontroller , comes in 2 ways depending on calls it, with:

customviewcontroller:

public partial class customviewcontroller : mvxviewcontroller<customviewmodel>, imvxoverridepresentationattribute {      public customviewcontroller() : base("customviewcontroller", null)     {      }      public mvxbasepresentationattribute presentationattribute()     {          if (viewmodel.kindnavigation) //here's issue         {             return new mvxsidebarpresentationattribute(mvxpanelenum.center, mvxpanelhinttype.resetroot, true, mvxsplitviewbehaviour.detail);         }         else         {             return new mvxmodalpresentationattribute             {                 modalpresentationstyle = uimodalpresentationstyle.overfullscreen,                 modaltransitionstyle = uimodaltransitionstyle.coververtical             };         }     } }

if viewmodel.anything, parameter define type of presentation, viewmodel, null , can't access. have not opened it, since type of presentation view not defined.

customviewmodel:

public class customviewmodel : mvxviewmodel<string>, idisposable {     private readonly imvxnavigationservice _navigationservice;      public customviewmodel(imvxnavigationservice navigationservice)     {         _navigationservice = navigationservice;     }      private bool _kindnavigation;     public bool kindnavigation     {         => _kindnavigation;         set => setproperty(ref _kindnavigation, value);     }      public void dispose()     {         throw new notimplementedexception();     }      public override task initialize(string parameter)     {         kindnavigation = convert.toboolean(parameter);         system.diagnostics.debug.writeline("parameter: " + parameter);          return base.initialize();     } }

this restriction in mvvmcross, because viewmodel not loaded before view is. described in documentation: https://www.mvvmcross.com/documentation/platform/ios-view-presenter?scroll=731#override-a-presentation-attribute-at-runtime


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