Question

请参见下面的XAML：

<ContentPage.ToolbarItems>
    <ToolbarItem
    Command="{Binding SettingsCommand}"
    Text="Settings">
        <ToolbarItem.Icon>
            <OnPlatform x:TypeArguments="FileImageSource">
                <On Platform="iOS, Android" Value="app_settings" />
                <On Platform="UWP, WinRT, WinPhone" Value="Assets/app_settings.png" />
            </OnPlatform>
        </ToolbarItem.Icon>
    </ToolbarItem>
</ContentPage.ToolbarItems>

<TabbedPage.Title>
    <OnPlatform x:TypeArguments="x:String">
        <On Platform="iOS, UWP, WinRT, WinPhone" Value="MyNamespace" />
    </OnPlatform>
</TabbedPage.Title>

<views:TestEnquiriesView
  x:Name="TestView">
    <views:TestEnquiriesView.Title>Test</views:TestEnquiriesView.Title>
</views:TestEnquiriesView>

<views:ProfileView
  x:Name="ProfileView">
    <views:ProfileView.Icon>
        <OnPlatform x:TypeArguments="FileImageSource">
            <On Platform="iOS, Android" Value="menu_profile" />
            <On Platform="UWP, WinRT, WinPhone" Value="Assets\menu_profile.png" />
        </OnPlatform>
    </views:ProfileView.Icon>
</views:ProfileView>

app_settings.png和menu_profile.png在Android上正确显示，但是在UWP上仅显示menu_profile.png。为什么？

偶然地，页面上有两个警告：

1）The attachable property ToolbarItems was not found in type ContentPage在此行：<ContentPage.ToolbarItems>。

2）The property default is set more than once在此行：<On Platform="UWP, WinRT, WinPhone" Value="Assets\menu_profile.png" />

我正在使用Visual Studio 2017。

Answer 1

尝试将/更改为\。

使用代码：

<On Platform="UWP, WinRT, WinPhone" Value="Assets\app_settings.png" />

代替

<On Platform="UWP, WinRT, WinPhone" Value="Assets/app_settings.png" />

图标未出现在TabbedPage上

1 个答案: