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xaml - 为什么将图像属性添加到按钮时 Xamarin 应用程序不运行

问题描述

我的问题是，当我将它们的文本属性设置为应用程序运行的任何文本和按钮时，我有一个带有 2 个按钮的简单应用程序。当我删除 text 属性并添加图像时，应用程序不会运行，但不会引发任何异常或错误

注意：我已将按钮的图标图像附加到 Android.Resources.Drawable

这是 XAML 代码：

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="PhotoGallery.Gallery"
             BackgroundColor="Black">
    <AbsoluteLayout>
        <Image Source="https://picsum.photos/1920/1080" x:Name="pic" Aspect="AspectFit" AbsoluteLayout.LayoutBounds="0,0,1,1" AbsoluteLayout.LayoutFlags="All"></Image>
        <ActivityIndicator IsRunning="{Binding Source={x:Reference pic} , Path=IsLoading}" AbsoluteLayout.LayoutBounds="0.5,0.1,100,100" AbsoluteLayout.LayoutFlags="PositionProportional"></ActivityIndicator>
        <Button Image="left.png" x:Name="btnPrevious" AbsoluteLayout.LayoutBounds="0.05 , 0.05 , 150 , 50" AbsoluteLayout.LayoutFlags="PositionProportional"></Button>
        <Button Image="right.png" x:Name="btnNext" AbsoluteLayout.LayoutBounds="0.95 , 0.05 , 150 , 50" AbsoluteLayout.LayoutFlags="PositionProportional"></Button>
    </AbsoluteLayout>
</ContentPage>

标签： xamlxamarin

解决方案

按钮似乎不是必需的，为什么不将它们替换为图像：

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="PhotoGallery.Gallery"
             BackgroundColor="Black">
    <AbsoluteLayout>
        <Image Source="https://picsum.photos/1920/1080" x:Name="pic" Aspect="AspectFit" AbsoluteLayout.LayoutBounds="0,0,1,1" AbsoluteLayout.LayoutFlags="All"></Image>
        <ActivityIndicator IsRunning="{Binding Source={x:Reference pic} , Path=IsLoading}" AbsoluteLayout.LayoutBounds="0.5,0.1,100,100" AbsoluteLayout.LayoutFlags="PositionProportional"></ActivityIndicator>
        <Image Source="left.png" x:Name="btnPrevious" AbsoluteLayout.LayoutBounds="0.05 , 0.05 , 150 , 50" AbsoluteLayout.LayoutFlags="PositionProportional">
            <Image.GestureRecognizers>
                    <TapGestureRecognizer Tapped="OnPreviousImageTapped"  />
            </Image.GestureRecognizers>
        </Image>
        <Image Source="right.png" x:Name="btnNext" AbsoluteLayout.LayoutBounds="0.95 , 0.05 , 150 , 50" AbsoluteLayout.LayoutFlags="PositionProportional">
            <Image.GestureRecognizers>
                    <TapGestureRecognizer Tapped="OnNextImageTapped"  />
            </Image.GestureRecognizers>
        </Image>
    </AbsoluteLayout>
</ContentPage>

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