xamarin - 在 xamarin 形式中使用 Rg.Plugins.Popup 时出现异常

Question

我在弹出窗口中填充了一个 ListView 。
我使用的是 1.0.4 版本

Rg.plugins.popup.

在选择列表项时，我打电话

PopupNavigation.PopAsync(true);

关闭弹出窗口。

但有时我会崩溃:

Android.Runtime.JavaProxyThrowable: Exception of type 'Android.Runtime.JavaProxyThrowable' was thrown. --- End of managed Android.Runtime.JavaProxyThrowable stack trace --- android.runtime.JavaProxyThrowable: System.IndexOutOfRangeException: There is not page in PopupStack at Rg.Plugins.Popup.Services.PopupNavigation.PopAsync (System.Boolean animate) [0x0000c] in :0 at TCRMobile.ViewModels.TicketsListGenericViewModel.OpenTicketTabsPage (TCRMobile.DataObjects.Ticket selectedTicket, System.Int32 mobileID, System.Nullable`1[T] laborMiscTimeMobileID) [0x00000] in :0 at TCRMobile.ViewModels.TicketsListGenericViewModel+<>c__DisplayClass13_0.b__0 () [0x00055] in :0 at TCRMobile.Droid.Services.DialogService+<>c__DisplayClass5_0.b__1 (System.Object sender, Android.Content.DialogClickEventArgs e) [0x0001d] in <5c6ae91b284846f5995b4e735df62b69>:0 at Android.Content.IDialogInterfaceOnClickListenerImplementor.OnClick (Android.Content.IDialogInterface dialog, System.Int32 which) [0x00012] in <1ccf2ea9504d42c08b47c05ee0c5e9f7>:0 at Android.Content.IDialogInterfaceOnClickListenerInvoker.n_OnClick_Landroid_content_DialogInterface_I (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_dialog, System.Int32 which) [0x0000f] in <1ccf2ea9504d42c08b47c05ee0c5e9f7>:0 at (wrapper dynamic-method) System.Object:d515a9d0-d793-4191-a5c6-5e450c1fd743 (intptr,intptr,intptr,int) at mono.android.content.DialogInterface_OnClickListenerImplementor.n_onClick(Native Method) at mono.android.content.DialogInterface_OnClickListenerImplementor.onClick(DialogInterface_OnClickListenerImplementor.java:30) at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:175) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6682) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1534) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1424)

我认为崩溃是因为我的一些用户双击了列表项。
我是否需要在调用之前始终检查弹出堆栈计数

popasync(true).

如果更新上面的弹出库可以解决这个问题？

请解释崩溃的原因和解决方案。

谢谢

Answer 1

试试这个弹出 View 页面。

  <?xml version="1.0" encoding="utf-8" ?>
<pages:PopupPage  xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="RootNamespace.Views.NeedHelpPopupView"
             xmlns:animations="clr-namespace:Rg.Plugins.Popup.Animations;assembly=Rg.Plugins.Popup"
             xmlns:pages="clr-namespace:Rg.Plugins.Popup.Pages;assembly=Rg.Plugins.Popup"
             xmlns:Controls="clr-namespace:RootNamespace.Controls">
    <pages:PopupPage.Animation>
        <animations:ScaleAnimation DurationIn="400" DurationOut="300" EasingIn="SinOut" EasingOut="SinIn" HasBackgroundAnimation="True" PositionIn="Center" PositionOut="Center" ScaleIn="1.2"  ScaleOut="0.8" />
    </pages:PopupPage.Animation>
    <StackLayout Padding="20,20,20,20" HorizontalOptions="Center" VerticalOptions="Center">
        <Grid Grid.Row="0">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>
            <Frame CornerRadius="10" Grid.Row="0" BackgroundColor="{StaticResource YetiBlue}" HasShadow="False" Margin="20,0">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                    </Grid.RowDefinitions>
                    <Grid Grid.Row="0">
                        <Image Source="{Binding IconNeedHelp}"/>
                        <Image Source="{Binding IconClose}" x:Name="ImageClose" HorizontalOptions="End" VerticalOptions="Start"/>
                    </Grid>
                </Grid>
            </Frame>
            <Frame CornerRadius="10" Grid.Row="0" BackgroundColor="{StaticResource YetiBlue}" HasShadow="False"  Margin="10,130,10,0">
            </Frame>
            <Frame CornerRadius="10" Grid.Row="0" BackgroundColor="{StaticResource White}" Margin="10,120,10,10" HasShadow="False">
                <Grid BackgroundColor="{StaticResource White}">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>
                    <Controls:Label Grid.Row="0" Text="{Binding LabelNeedHelpTitle}" TextColor="{Binding Black}" HorizontalOptions="Center" FontAttributes="Bold" FontSize="20"/>
                    <BoxView Grid.Row="1" VerticalOptions="CenterAndExpand" HorizontalOptions="Center" WidthRequest="80" HeightRequest="4" Color="{StaticResource YetiBlue}"/>
                    <Controls:Label Grid.Row="2" Text="{Binding LabelDescription}" TextColor="{Binding Black}" HorizontalOptions="CenterAndExpand" FontAttributes="Bold" FontSize="17" Margin="{StaticResource Margin10}"/>
                </Grid>
            </Frame>
        </Grid>
    </StackLayout>
</pages:PopupPage>

这是导航部分。

 protected override void OnAppearing()
        {
            base.OnAppearing();
            ImageClose.GestureRecognizers.Add(new TapGestureRecognizer
            {
                Command = new Command(_ =>
                {
                    PopupNavigation.Instance.PopAsync();
                })
            });
        }

安卓

在 MainActivity.cs 文件中。

Rg.Plugins.Popup.Popup.Init(this, bundle);

IOS

在 AppDelegate.cs 文件中。

 Rg.Plugins.Popup.Popup.Init();

试试这个代码。

并在项目 Rg.Plugins.Popup 1.1.4.158-pre 安装包。