如何将TitleIcon和按钮添加到NavigationPage导航栏?

我想添加TitleIcon并重新加载按钮导航栏的NavigationPage,但不知道该怎么做。我试图使用图标属性的导航页面,但它不起作用。关于添加按钮到导航页面,我还没有找到任何东西。如何将TitleIcon和按钮添加到NavigationPage导航栏?

<?xml version="1.0" encoding="UTF-8"?> 

<MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms"

xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"

x:Class="App.MasterDetailMenu"

xmlns:local="clr-namespace:App;assembly=App">

<MasterDetailPage.Master>

<local:MasterPage/>

</MasterDetailPage.Master>

<MasterDetailPage.Detail >

<NavigationPage BarBackgroundColor="#7FBE5D" x:Name="NavBar" Icon="image.png">

<x:Arguments>

<local:Feedbacks/>

</x:Arguments>

</NavigationPage>

</MasterDetailPage.Detail>

回答:

[XamlCompilation(XamlCompilationOptions.Compile)] 

public partial class AboutPage : ContentPage

{

public AboutPage()

{

InitializeComponent();

NavigationCommand = new Command(NavigationCommandToInfo);

ToolbarItems.Add(new ToolbarItem() { Icon = "Info2.png", Command=NavigationCommand });

}

public ICommand NavigationCommand { get; }

void NavigationCommandToInfo() =>

Navigation.PushAsync(new MainPage());

}

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