Question

我尝试将MvxListView的选定项绑定到我的属性。这是我的布局：

[ImplementPropertyChanged]
public class SelectCategoryListViewModel : AbstractCategoryListViewModel
{
    /// <summary>
    ///     Creates an CategoryListViewModel for the usage of providing a category selection.
    /// </summary>
    /// <param name="categoryRepository">An instance of <see cref="IRepository{T}" /> of type category.</param>
    /// <param name="dialogService">An instance of <see cref="IDialogService" /></param>
    public SelectCategoryListViewModel(IRepository<Category> categoryRepository,
        IDialogService dialogService) : base(categoryRepository, dialogService)
    {}

    public Category SelectedCategory { get; set; }

    public MvxCommand DoneCommand => new MvxCommand(Done);

    public MvxCommand CancelCommand => new MvxCommand(Cancel);

    private void Done()
    {
        MessageHub.Publish(new CategorySelectedMessage(this, SelectedCategory));
        Close(this);
    }

    private void Cancel()
    {
        Close(this);
    }
}

此处的ItemSource已正确绑定。

视图模型：

public class SelectCategoryListActivity : MvxFragmentCompatActivity<SelectCategoryListViewModel>
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        SetContentView(Resource.Layout.fragment_category_list);

        SetSupportActionBar(FindViewById<Toolbar>(Resource.Id.toolbar));
        SupportActionBar.SetDisplayHomeAsUpEnabled(true);
    }
...

不是通过Fody完成通知PropertyChanged，而且类别在父虚拟机中。

<ul class="footerNav footnav1">
     <?php $parents = table_fetch_rows('page', 'status = 1 AND footer_nav = 1 AND parent_id < 0', 'position ASC'); ?>
     <?php if(count($parents) > 0): ?>
         <?php foreach($parents as $key => $parent): ?>
             <li><a href="<?php echo getRewriteUrl('page', $parent['id']); ?>"><?php echo $parent['menu_title']; ?></a></li>
         <?php endforeach; ?>
     <?php endif; ?>
</ul><!-- footerNav -->

我得到的警告是：

[0：] MvxBind：警告：5.11无法为SelectedCategory绑定SelectedItem创建目标绑定

想法？

Answer 1

我遇到了类似的问题，SelectedItem绑定失败了。解决方案是将Mvx更新到4.1.6版。原因是您需要注册MvxAppCompatSetupHelper.FillTargetFactories，而4.1.6现在已自动完成。

或者，您可以通过覆盖FillTargetFactories：

在setup.cs中手动注册它

protected override void FillTargetFactories(IMvxTargetBindingFactoryRegistry registry)
{
    MvxAppCompatSetupHelper.FillTargetFactories(registry);
    base.FillTargetFactories(registry);
}

无法为绑定SelectedItem创建目标绑定

1 个答案: