Xamarin导航栏具有不需要的默认图标，无法更改或删除 [英] Xamarin navigation bar has unwanted default icon, impossible to alter or remove

问题描述

最近我将Xamarin项目升级到了所有最新的DLL.现在，导航栏上的图标已出现在Android上(尚未查看iOS).看到通用图标:

Recently I upgraded my Xamarin project to all the latest DLLs. Now on the navigation bar an icon has appeared on Android (haven't looked at iOS yet). See generic icon:

花了数小时搜索和制作原型代码后，我仍然不知道如何更改或摆脱该图标！对我的项目中的png文件进行递归搜索找不到这样的图像.

After spending hours searching and prototyping code I still can't figure out how to change or get rid of the icon! Doing a recursive search for png files in my project finds no such image.

有一个方法SetTitleIcon，但是该方法没有执行任何操作.有人谈论布局文件夹中的工具栏xaml文件，但是我没有这样的文件.

There is a method SetTitleIcon but that method doesn't do anything. Some people talk about a toolbar xaml file in the layout folder, but I have no such file.

我遵循了本教程: https://xamarinhelp.com/xamarin-forms-toolbar/，但只能添加图标，它不会删除默认图标.

I followed this tutorial: https://xamarinhelp.com/xamarin-forms-toolbar/ but can only add icons, it doesn't remove the default icon.

我找到了这个演示项目: https://developer.xamarin.com /samples/monodroid/Supportv7/AppCompat/Toolbar ，但该代码与我的代码完全不同.我需要走那条路线吗?

I found this demo project: https://developer.xamarin.com/samples/monodroid/Supportv7/AppCompat/Toolbar but that code is quite different from mine. Do I need to go that route?

无论如何，我的主要xaml文件:

Anyway, my main xaml file:

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

  <MasterDetailPage.Master>
    <local:MainPageMaster x:Name="MasterPage" />
  </MasterDetailPage.Master>
  <MasterDetailPage.Detail>
        <NavigationPage BarBackgroundColor="#DCDCDC"> 
      <x:Arguments>
         <local:ActionProcessesPage />
      </x:Arguments>
    </NavigationPage>
  </MasterDetailPage.Detail>
</MasterDetailPage>

导航栏项目中的其他地方几乎没有提及.我确实尝试在导航页"下添加一个NavigationPage.Icon.什么都没发生.

There is little to no mention anywhere else in the project of a navigation bar. I did try to add a NavigationPage.Icon under the Navigation Page. Nothing happened.

我只兼职做Xamarin是我的借口.

I only do Xamarin part-time is my excuse.

推荐答案

我在Stack Overflow上发布的主要原因之一经常是(出于某种原因)发布后不久(我会找出答案).

One of the main reasons I post on Stack Overflow is often (for some reason) shortly after posting I will figure out or find the answer.

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:SharedMobile;assembly=MyApp.Mobile"
             NavigationPage.TitleIcon="transparent.png"
             x:Class="SharedMobile.ActionProcessesPage">

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