[英]MasterDetailPage background image not displaying in IOS in xamarin.forms
我在 Xamarin.Forms 中使用 MasterDetailPage。 我在 OnAppearing() 方法中设置了 BackgroundImage 属性。 它在android中运行良好。 但是,在 IOS 中不显示图像。
我的代码:XAML
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="EzySales.Views.MainPageMaster"
Title="Master" >
<StackLayout VerticalOptions="FillAndExpand">
<ListView x:Name="MenuItemsListView" WidthRequest="200"
HasUnevenRows="true"
ItemsSource="{Binding MenuItems}"
SeparatorColor="White">
<ListView.Header>
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="10"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="80"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="10"/>
</Grid.RowDefinitions>
<Image Source="logo.png" Grid.Row="1" Grid.Column="1"></Image>
</Grid>
</ListView.Header>
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell Grid.Row="2">
<StackLayout Padding="15,10" Orientation="Horizontal">
<Image Source="{Binding Icon}"
WidthRequest="30"
HeightRequest="30" Margin="0,0,5,0"
VerticalOptions="Center" />
<Label VerticalOptions="FillAndExpand"
VerticalTextAlignment="Center"
HorizontalTextAlignment="Center"
Text="{Binding Title}"
TextColor="White"
FontSize="16" FontAttributes="Bold" />
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
MainPageMaster.xaml.cs
protected override void OnAppearing()
{
this.BackgroundImage = "masterpagebg.png";
}
图像在资源文件夹中可用。
我也面临同样的问题并解决了。 试试这个希望它会有所帮助..
您可以使用相对布局来实现结果
<RelativeLayout>
<Image Source="masterpagebg.png" Opacity="1"
RelativeLayout.WidthConstraint=
"{ConstraintExpression Type=RelativeToParent, Property=Width}"
RelativeLayout.HeightConstraint=
"{ConstraintExpression Type=RelativeToParent, Property=Height}"/>
<ListView RelativeLayout.WidthConstraint=
"{ConstraintExpression Type=RelativeToParent, Property=Width}"
RelativeLayout.HeightConstraint=
"{ConstraintExpression Type=RelativeToParent, Property=Height}" x:Name="MenuItemsListView" WidthRequest="200"
HasUnevenRows="true"
ItemsSource="{Binding MenuItems}"
SeparatorColor="White">
<ListView.Header>
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="10"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="80"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="10"/>
</Grid.RowDefinitions>
<Image Source="logo.png" Grid.Row="1" Grid.Column="1"></Image>
</Grid>
</ListView.Header>
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell Grid.Row="2">
<StackLayout Padding="15,10" Orientation="Horizontal">
<Image Source="{Binding Icon}"
WidthRequest="30"
HeightRequest="30" Margin="0,0,5,0"
VerticalOptions="Center" />
<Label VerticalOptions="FillAndExpand"
VerticalTextAlignment="Center"
HorizontalTextAlignment="Center"
Text="{Binding Title}"
TextColor="White"
FontSize="16" FontAttributes="Bold" />
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</RelativeLayout>
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