我制作了一个简单的用户界面，我希望在My playground
***let cell1 = UICollectionViewCell()
let cell2 = UICollectionViewCell()
let cells = [cell1, cell2]
let collection = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())
for cell in cells {
collection.register(cell, forCellWithReuseIdentifier: "hello")
}***
Any ideas?
Thanks in advance
行的底部设置边框。我的目的是使用Grid，如此：
Line
我尝试使用纯色而不是我在这里设置的画笔，我确保当我突出显示这条线本身时，高光确实有一个覆盖（它看起来像一个与一条线相对的矩形，所以应该可见）。
请注意，我没有使用<Window x:Class="HP_hf_shop.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:HP_hf_shop"
mc:Ignorable="d"
Title="MainWindow" Height="500" Width="800"
>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="2*"/>
<RowDefinition Height="10*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="2*"/>
<ColumnDefinition Width="2.5*"/>
<ColumnDefinition Width="2*"/>
</Grid.ColumnDefinitions>
<Border Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3" VerticalAlignment="Bottom"
Margin="10,0,10,0">
<Border.Background>
<LinearGradientBrush StartPoint="0,1" EndPoint="1,1">
<GradientStop Color="DarkGray" Offset="0.05"/>
<GradientStop Color="Gray" Offset="0.15"/>
<GradientStop Color="Gray" Offset="0.85"/>
<GradientStop Color="DarkGray" Offset="0.95"/>
</LinearGradientBrush>
</Border.Background>
</Border>
<Button Grid.Row="1" Grid.Column="0" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" Margin="10,30,10,10">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="5*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
</Grid>
</Button>
<Button Grid.Row="1" Grid.Column="1" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" Margin="10,10,10,10">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="5*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
</Grid>
</Button>
<Button Grid.Row="1" Grid.Column="2" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" Margin="10,30,10,10">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="5*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
</Grid>
</Button>
</Grid>
。该行位于Canvas上，带有一些按钮。任何想法为什么线根本不显示，甚至在运行时都没有显示？
答案 0 :(得分：1)
任何想法为什么线根本不显示，甚至在运行时都不显示？
您需要设置X1的{{1}}和X2属性，以绘制水平线：
Line如果您希望画笔填充网格行，您应该使用另一个伸展的元素来填充可用空间，例如<Line Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3" VerticalAlignment="Bottom"
HorizontalAlignment="Stretch" StrokeThickness="10" Margin="10,0,10,0"
X1="0" X2="100">
<Line.Stroke>
<LinearGradientBrush StartPoint="0,1" EndPoint="1,1">
<GradientStop Color="DarkGray" Offset="0.05"/>
<GradientStop Color="Gray" Offset="0.15"/>
<GradientStop Color="Gray" Offset="0.85"/>
<GradientStop Color="DarkGray" Offset="0.95"/>
</LinearGradientBrush>
</Line.Stroke>
</Line>
：
Border