How to use

That to open a popup page you should create new class or xaml file and extend it from Rg.Plugins.Popup.Pages.PopupPage

Example

<?xml version="1.0" encoding="utf-8" ?>
<pages:PopupPage 
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:pages="clr-namespace:Rg.Plugins.Popup.Pages;assembly=Rg.Plugins.Popup"
    xmlns:animations="clr-namespace:Rg.Plugins.Popup.Animations;assembly=Rg.Plugins.Popup"
    x:Class="MyProject.MyPopupPage">
    <!--You can set an animation in the xaml file or in the csharp code behind-->
    <pages:PopupPage.Animation>
        <animations:ScaleAnimation 
            PositionIn="Center"
            PositionOut="Center"
            ScaleIn="1.2"
            ScaleOut="0.8"
            DurationIn="400"
            DurationOut="300"
            EasingIn="SinOut"
            EasingOut="SinIn"
            HasBackgroundAnimation="True"/>
    </pages:PopupPage.Animation>
    <!--You can use any elements here which are extended from Xamarin.Forms.View-->
    <StackLayout 
        VerticalOptions="Center" 
        HorizontalOptions="Center" 
        Padding="20, 20, 20, 20">
        <Label
            Text="Test"/>
    </StackLayout>
</pages:PopupPage>

namespace MyProject
{
    public partial class MyPopupPage : Rg.Plugins.Popup.Pages.PopupPage
    {
        public MyPopupPage()
        {
            InitializeComponent();
        }

        protected override void OnAppearing()
        {
            base.OnAppearing();
        }

        protected override void OnDisappearing()
        {
            base.OnDisappearing();
        }

        // ### Methods for supporting animations in your popup page ###

        // Invoked before an animation appearing
        protected override void OnAppearingAnimationBegin()
        {
            base.OnAppearingAnimationBegin();
        }

        // Invoked after an animation appearing
        protected override void OnAppearingAnimationEnd()
        {
            base.OnAppearingAnimationEnd();
        }

        // Invoked before an animation disappearing
        protected override void OnDisappearingAnimationBegin()
        {
            base.OnDisappearingAnimationBegin();
        }

        // Invoked after an animation disappearing
        protected override void OnDisappearingAnimationEnd()
        {
            base.OnDisappearingAnimationEnd();
        }

        protected override Task OnAppearingAnimationBeginAsync()
        {
            return base.OnAppearingAnimationBeginAsync();
        }

        protected override Task OnAppearingAnimationEndAsync()
        {
            return base.OnAppearingAnimationEndAsync();
        }

        protected override Task OnDisappearingAnimationBeginAsync()
        {
            return base.OnDisappearingAnimationBeginAsync();
        }

        protected override Task OnDisappearingAnimationEndAsync()
        {
            return base.OnDisappearingAnimationEndAsync();
        }

        // ### Overrided methods which can prevent closing a popup page ###

        // Invoked when a hardware back button is pressed
        protected override bool OnBackButtonPressed()
        {
            // Return true if you don't want to close this popup page when a back button is pressed
            return base.OnBackButtonPressed();
        }

        // Invoced when background is clicked
        protected override bool OnBackgroundClicked()
        {
            // Return false if you don't want to close this popup page when a background of the popup page is clicked
            return base.OnBackgroundClicked();
        }
    }
}