Question

请帮助我解决以下问题。

这是我的问题。如果没有动画就推送（false），然后是问题。如果动画为true，则工作正常。

//  await Navigation.PushAsync<DeleteDealsAndOffersViewModel>(); --> **working fine**

//  await Navigation.PushAsync(new DeleteDealsAndOffersViewModel());**working fine** 


vm = new DeleteDealsAndOffersViewModel
            {
                DealsAndOffersList = dealLists,
                //CategoryColor = CategoryColor,
                IsDelete = true
            };

//await Navigation.PushAsync(vm,false); **issue with back button**

我为后退按钮使用了以下代码。这是我的基类。

<?xml version="1.0" encoding="UTF-8"?>
<v:ExtendedContentPage 
    xmlns:v="clr-namespace:Core.Views;assembly=Core" 
    xmlns="http://xamarin.com/schemas/2014/forms" 
    LeftBarButtonTitle="&lt; Back"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
    x:Class="Vi.Views.BasicV">
    <ContentPage.Content>
    </ContentPage.Content>
</v:ExtendedContentPage>

now I create another page and set base class on that page

DeleteDealsAndOffersListPage.xaml

 <?xml version="1.0" encoding="UTF-8"?>
    <view:BasicV 
        xmlns="http://xamarin.com/schemas/2014/forms" 
        xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
        xmlns:view="clr-namespace:Vi.Views;assembly=FlagSpree" 
        xmlns:sty="clr-namespace:VillageVesl.Styles;assembly=FlagSpree" 
        xmlns:v="clr-namespace:Core.Views;assembly=Core" 
        xmlns:comp="clr-namespace:VillageVesl.Views.Components;assembly=FlagSpree" 
        x:Name="main" Title="{Binding Title}"
        LeftBarButtonTitle="Cancel"
        BackgroundColor="{x:Static sty:Colors.BGColor}"
        x:Class="Vi.Views.DeleteDealsAndOffersListPage">
        <ContentPage.ToolbarItems>
            <ToolbarItem IsDestructive="true" Text="Delete" Command="{Binding DeleteAllSelectedDealsCommand}" />
        </ContentPage.ToolbarItems>
      <ContentPage.Content>
        </ContentPage.Content>
    </view:BasicV>

“ DeleteDealsAndOffersListPage.xaml.cs” 。

namespace Vi.Views
{
    public partial class DeleteDealsAndOffersListPage : BasicV
    {
        public DeleteDealsAndOffersListPage()
        {
            InitializeComponent();
        }
    }
}

现在的问题是，当我按下 DeleteDealsAndOffersListPage 然后显示两个后退按钮。

Answer 1

您似乎正在创建自己的“后退按钮”。 Xamarin会将其自己的后退按钮添加到您推送到导航堆栈的任何页面上，这是您看到的额外的后退按钮吗？如果是这样，则在执行推送之前，添加：

        NavigationPage.SetHasBackButton(vm, false);

如何从Xamarin中的导航中删除多个后退按钮？

1 个答案: