ViewIsAppearing called multiple times

[mwerickson]

I have a very simple android application (targeting API level 23) built with Xamarin.Forms (2.4.0.282), FreshMvvm (2.2.0) with the following in the app.xaml.cs constructor:

var mainPage = FreshPageModelResolver.ResolvePageModel<MainPageModel>();
var mainNavContainer = new FreshNavigationContainer(mainPage);
MainPage = mainNavContainer;

The first time MainPageModel is called/pushed, the ViewIsAppearing method is called multiple times (normally twice, but I've seen 3 times). The ViewIsDisappearing method is called almost immediately after each ViewIsAppearing method is complete.

The ViewIsAppearing method can simply have var x = 1; in it and it would be called multiple times. I have nothing in the ViewIsDisappearing but did override it just to see when it was getting called.

Is this a bug with FreshMVVM or Xamain? Or is there something else I should be looking at in my code?

Thanks, Mark Erickson

[EmilAlipiev]

maybe you can share your code with us. I didnt experience such behavior.

[sjorsmiltenburg]

I am also encounter this behaviour in my app. I am using FreshMvvm version 2.2.3.

[maherzaidoune]

same problem here

[EmilAlipiev]

Do you mean that it appears 2 because once it is in the viewmodel ViewIsAppearing and 2nd in xaml.cs OnAppearing. this is the only 2 times I observed.

[maherzaidoune]

well , the first time the page loaded the ViewIsAppearing method is called 3 times , then its called 2 times everytime the page is loaded

[RuddyOne]

I am also experiencing the same problem. Its causing a little bit of an issue for me.

[libin85]

@Ruddy2007 : I use FreshMvvm very regularly and have build a few apps with it. Never had this issue. I suspect it might be implemenation error. Can you please upload a sample project. I can review and get back to you soon.

[RuddyOne]

@libin85 Sorry for the late reply, I will try to get round to creating a sample project and get back to you. :)

[kwabenaowusujnr]

ViewIsAppearing might be called several times if your are calling OnAppearing() on your ContentPage.

[LeoJHarris]

Might be releaed to an issue I opened a little while ago on the Xamarin Forms Github page https://github.com/xamarin/Xamarin.Forms/issues/2240 which is a bug with Xamarin Forms

[gazwinter]

@libin85 Did you ever get anywhere with this?