Navigation is not done when showing Alert in the Init() method about freshmvvm HOT 10 OPEN

I'm had similar issues with Init().

Since this get's called before the view model is set as the BindingContext on the page, then you can't perform any UI activities here.

I've had to resort to saving the parameter as a member variable, then doing any of my real work in the ViewIsAppearing()

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any solution?

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Init method is only used for setup, not for showing messages.

It would be better to use the appearing events on the PageModel.

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Ok, when I use the ViewIsAppearing() method it it works fine.

@rid00z in my app, each time I navigate (doing push) to some pages, the PageModel needs to do some calls to server side (and will show some alert if there is some exception). Must I use ViewIsAppearing instead of Init method?

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up

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Yes appearing events are better but you can also set of a background task in the init method.

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Yes, the problem is where in the Init method is there any exception and, because of this exception, I want to show an alert. The navigation is broken and you cannot do any navigation.

For example, in the Init method I do something like...

    public override void Init(object initData)
    {
        base.Init(initData);

        try
        {                              
            CallToApi();
        }
        catch (Exception ex)
        {
            // Show a modal with some error message.
        }
    }

I have the feeling that I am doing something wrong...

Thanks.

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any idea guys? :-)

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Yeah, why you not call the api on Event? And create an activity indicator in init.

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Task.Factory.StartNew(() => DownloadDataFromInternet(), TaskCreationOptions.LongRunning);

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