We're using Prism.DryIoc.Forms to create apps with Xamarin.Forms. To minimize the startup time of the app we are using the Lazy<> pattern for classes with a lot of dependencies.
This used to work fine with Prism.Unity.Forms. However, I can't get it to work with Prism.DryIoc.Forms. Any help would be appreciated.
The code is as follows. We have a page view model like this:
public class MySamplePageViewModel
{
private readonly Lazy<ISomeClass> _lazySomeClass;
public MySamplePageViewModel(Lazy<ISomeClass> lazySomeClass)
{
_lazySomeClass = lazySomeClass;
}
public void SomeMethod()
{
_lazySomeClass.Value.DoIt(); //throws exception
}
}
However, after the page view model is being instantiated, when calling _lazySomeClass.Value we get an exception with message "Container is no longer available (has been garbage-collected).". It seems to be related to how Prism resolves the view model, because when calling the following it works fine:
var container = (Application.Current as PrismApplicationBase<IContainer>).Container;
var lazySomeClass = container.Resolve<Lazy<ISomeClass>>();
lazySomeClass.Value.DoIt(); //works fine
we're doing the registration like this:
container.Register<ISomeClass, SomeClass>(Reuse.Singleton);
container.RegisterTypeForNavigation<MySamplePage, MySamplePageViewModel>("MySamplePage");
