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图像大小,放置在Xamarin Forms Labs的图像按钮中

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我有以下Xaml使用Xamarin Forms Labs . 图像太小,文本居中 . 我试图让图像更大一些,但ImageHeightRequest属性似乎没有任何影响 . 我还尝试了几种StackLayout格式组合,例如StackLayout上的HorizontalOptions =“StartAndExpand”,以及元素 . 这导致按钮被压缩到左侧,并且不足以显示按钮的整个文本 . 有没有人知道如何用更大的图像实现这一点,并且一切都与左边对齐?我知道图像更大,因为我将其从Windows Phone移植到Xamarin,并且在Windows Phone上相同的图像更大 . 我也尝试使用常规的Xamarin Forms Image Button,它渲染相同大小的图像

<StackLayout Spacing="0"  >

<Label>
  <Label.FormattedText>
    <FormattedString>
      <FormattedString.Spans>
        <Span Text="My Label" ForegroundColor="#5C85FF" Font="Large"/>
      </FormattedString.Spans>
    </FormattedString>
  </Label.FormattedText>
</Label>

<controls:ImageButton Text="Button 1" BackgroundColor="#5C85FF" TextColor="#ffffff" HeightRequest="90" WidthRequest="175" Image="Image1.png" Orientation="ImageToLeft"  ImageHeightRequest="85" ImageWidthRequest="100" Clicked="ScanProductClicked"  />

<controls:ImageButton Text="Button 2" BackgroundColor="#5C85FF" TextColor="#ffffff" HeightRequest="90" WidthRequest="175" Image="Image2.png" Orientation="ImageToLeft"  ImageHeightRequest="85" ImageWidthRequest="100" Clicked="ShopProductsClicked"  />

<controls:ImageButton Text="Button 3" BackgroundColor="#5C85FF" TextColor="#ffffff" HeightRequest="90" WidthRequest="175" Image="Image3.png" Orientation="ImageToLeft"  ImageHeightRequest="85" ImageWidthRequest="100" Clicked="ShoppingListsClicked"  />

<controls:ImageButton Text="Button 4" BackgroundColor="#5C85FF" TextColor="#ffffff" HeightRequest="90" WidthRequest="175" Image="Image4.png" Orientation="ImageToLeft"  ImageHeightRequest="85" ImageWidthRequest="100" Clicked="LogInClicked"  />

<controls:ImageButton Text="Button 5" BackgroundColor="#5C85FF" TextColor="#ffffff" HeightRequest="90" WidthRequest="175" Image="Image5.png" Orientation="ImageToLeft"  ImageHeightRequest="85" ImageWidthRequest="100" Clicked="SettingsClicked"  /> </StackLayout>

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