XAMARIN Button with Label and image inside / mainpage=navigation page - xamarin

Question

I am fairly new and inexperienced. I have two questions. First: what would the xaml code in xamarin look like for such a button? The blue one should be the button. The button should contain a text and a picture. So it should also work that when the image or text is clicked, the button is actually clicked.
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Second: my app has two sides. The start page is MainPage and the other page is Page1. I can switch to Page1 using a button on MainPage. I looked at a tutorial and in App.xaml.cs "MainPage = new MainPage ();" was made to "MainPage = new NavigationPage (new MainPage ());". Why was that done? Why does the page change via a button click not work differently?
enter image description here
Since it was coded to "MainPage = new NavigationPage (new MainPage ());" , there is a blue bar at the top of my MainPage. How can I remove this bar or make it white?
enter image description here

Answer 1

For the first question:
There is no such control now, but you can do this by using a Frame and adding an Image and Label to it，then you could add a TapGestureRecognizer to the Frame.
like:
<Frame CornerRadius="20" HorizontalOptions="Start" WidthRequest="100" HeightRequest="120" BackgroundColor="Blue" Padding="40">
<StackLayout Orientation="Vertical" >
<Image Source="heart.png"></Image>
<Label Text="hello world" BackgroundColor="Red" ></Label>
</StackLayout>
<Frame.GestureRecognizers>
<TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped">
</TapGestureRecognizer>
</Frame.GestureRecognizers>
</Frame>
handle the click event in code behind:
private void TapGestureRecognizer_Tapped(object sender, EventArgs e)
{
//do something
}
For the second question:
1)To move from one page to another, an application will push a new page onto the navigation stack.The NavigationPage class provides a hierarchical navigation experience where the user is able to navigate through pages, forwards and backwards, as desired. The class implements navigation as a last-in, first-out (LIFO) stack of Page objects.
2)The top blue bar we call it NavigationBar.If you want display it,you could set NavigationPage.SetHasNavigationBar(this, false); in your MainPage.xaml.cs like:
public MainPage()
{
InitializeComponent();
NavigationPage.SetHasNavigationBar(this, false);
}
or set it in the MainPage.xaml like：
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
NavigationPage.HasNavigationBar="False"
x:Class="YourNamespace.MainPage">
....
</ContentPage >
You could look at https://learn.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/navigation/hierarchical for more details.