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菜鸟教程小白 发表于 2022-12-12 14:30:55

c# - 演示者字典中未配置 MvxSidebarPresentationAttribute

                                            <p><blockquote>
<p>Unhandled Exception </p>

<p><strong>System.Collections.Generic.KeyNotFoundException</strong>:
The type MvxSidebarPresentationAttribute is not configured in the
presenter dictionary</p>
</blockquote>

<ul>
<li>MvvmCros 5.6 工具</li>
<li> Visual Studio2015</li>
<li>Windows 8.1</li>
<li>iPhone 7 模拟器 iOS 10.3</li>
</ul>

<p><br/></p>

<p><strong>代码</strong>
<br/>
菜单 View </p>

<pre><code>   
   
    public partial class MenuViewController : MvxViewController&lt;MenuViewModel&gt;
    {
      public MenuViewController(IntPtr handle) : base(handle)
      {
      }

      public MenuViewController() : base(&#34;MenuViewController&#34;, null)
      {
      }

      public override void DidReceiveMemoryWarning()
      {
            // Releases the view if it doesn&#39;t have a superview.
            base.DidReceiveMemoryWarning();

            // Release any cached data, images, etc that aren&#39;t in use.
      }
      public override void ViewDidLoad()
      {
            base.ViewDidLoad();
            var set = this.CreateBindingSet&lt;MenuViewController, MenuViewModel&gt;();
            set.Bind(btnFirst).To(vm =&gt; vm.GotoFirstView);
            set.Bind(btnSecond).To(vm =&gt; vm.GotoSecondView);
            set.Apply();
            // Perform any additional setup after loading the view, typically from a nib.
      }
}
</code></pre>

<p>第一个 View </p>

<pre><code>

public partial class FirstViewController : MvxViewController&lt;FirstViewModel&gt;
{
    public FirstViewController() : base(&#34;FirstViewController&#34;, null)
    {
    }

    public FirstViewController(IntPtr handle) : base(handle)
    {
    }
    public override void DidReceiveMemoryWarning()
    {
      base.DidReceiveMemoryWarning();

      // Release any cached data, images, etc that aren&#39;t in use.
    }

    public override void ViewDidLoad()
    {
      base.ViewDidLoad();

      // Perform any additional setup after loading the view, typically from a nib.
    }
}
</code></pre>

<p>第二个 View </p>

<pre><code>
   
    public partial class SecondViewController : MvxViewController&lt;SecondViewModel&gt;
    {
      public SecondViewController() : base(&#34;SecondViewController&#34;, null)
      {
      }

      public SecondViewController(IntPtr handle) : base(handle)
      {
      }

      public override void DidReceiveMemoryWarning()
      {
            base.DidReceiveMemoryWarning();

            // Release any cached data, images, etc that aren&#39;t in use.
      }

      public override void ViewDidLoad()
      {
            base.ViewDidLoad();

            // Perform any additional setup after loading the view, typically from a nib.
      }
    }
</code></pre>

<p>我在我的 ios 项目中使用了上面的代码，但它只是在输出中显示错误为
<br/>
<strong>未处理的异常</strong></p>

<p><strong>System.Collections.Generic.KeyNotFoundException:</strong>类型 MvxSidebarPresentationAttribute 未在演示者字典中配置</p></p>
                                    <br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
                                            <p><p>您必须在您的 iOS 项目的 <code>Setup.cs</code> 文件中使用 <code>MvxSidebarPresenter</code>:</p>

<pre><code>protected override IMvxIosViewPresenter CreatePresenter()
{
   return new MvxSidebarPresenter((MvxApplicationDelegate)ApplicationDelegate, Window);
}
</code></pre>

<p>您可以查看工作示例 <a href="https://github.com/MvvmCross/MvvmCross/blob/8218d74b5d005929c047c9e026032323c389aacd/TestProjects/iOS-Support/XamarinSidebar/MvvmCross.iOS.Support.Sidebar/Setup.cs" rel="noreferrer noopener nofollow">in the samples</a> .</p></p>
                                   
                                                <p style="font-size: 20px;">关于c# - 演示者字典中未配置 MvxSidebarPresentationAttribute，我们在Stack Overflow上找到一个类似的问题：
                                                        <a href="https://stackoverflow.com/questions/48238699/" rel="noreferrer noopener nofollow" style="color: red;">
                                                                https://stackoverflow.com/questions/48238699/
                                                        </a>
                                                </p>
                                       

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