PermissionUngrantedPage.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"
             x:Class="PermissionsUISample.Views.PermissionUngrantedPage"
             xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core"
             ios:Page.UseSafeArea="true"
             Title="Permission">
    <ContentPage.Content>
        <StackLayout Spacing="30"
                     Padding="30">
            <Image Source="ic_camerafullsize"
                   VerticalOptions="CenterAndExpand"
                   HeightRequest="200"
                   HorizontalOptions="FillAndExpand"/>

              <Label Text="Your camera permission is disabled :( "
                     FontAttributes="Bold"
                   TextColor="#3C2820"
                   FontSize="Large"
                   HorizontalTextAlignment="Center"/>

            <Label Text="This app needs access to your cam, which is required for Augmented reality."
                   TextColor="#3C2820"
                   FontSize="Large"
                   HorizontalTextAlignment="Center"/>

             <Button Text="Go to settings"
                     Margin="10,0"
                     VerticalOptions="EndAndExpand"
                      Command="{Binding GoSettingsCommand}"
                      CornerRadius="20"
                      FontSize="20"
                      TextColor="White"
                      BackgroundColor="#EE7E4C" />

              <Label Text="Use the app without the camera"
                   TextColor="#EE7E4C"
                   FontSize="Medium"
                   HorizontalTextAlignment="Center"/>
        </StackLayout>
    </ContentPage.Content>
</ContentPage>