如何使用Prism和Xamarin.Forms设置页面内容？

Question

So, currently in my MainPageViewModel, I have something like this:

        WrapLayout wrapLayout;

        private string _title;
        public string Title
        {
            get { return _title; }
            set { SetProperty(ref _title, value); }
        }

        public MainPageViewModel()
        {
            wrapLayout = new WrapLayout();

            Content = new ScrollView
            {
                Margin = new Thickness(0, 20, 0, 20),
                Content = wrapLayout
            };
        }

Where MainPageViewModel inherits from BindableBase... However, I also want it to inherit from ContentPage, so I can set the page content to my wraplayout. However, it won't allow me to inherit from two base classes.

I'm confused on how to proceed then?

Here's my XAML:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:VideriMediaViewer"
             x:Class="VideriMediaViewer.MainPage">

    <ScrollView Margin="0,20,0,20">
        <local:WrapLayout x:Name="wrapLayout" />
    </ScrollView>
</ContentPage>

What can I do in this scenario? I want to bind to the tile in my xaml (have MVVM structure) but also set content page.

Answer 1

You've completely missed the entire point of MVVM. Your ViewModel should NEVER EVER have any View or any understanding of the View. The entire point is loosely coupled code allowing a separation of concerns.

I suggest that you head over to the Prism Samples for Xamarin Forms to get a better understanding of how to properly set up an app.