Xamarin.Forms长按效果-如何在隐藏代码中设置命令(NO XAML) [英] Xamarin.Forms Long Press Effect - How to set the Command in Code Behind (NO XAML)

问题描述

我正在使用此解决方案来处理长按事件: https://alexdunn.org/2017/12/27/xamarin-tip-xamarin-forms-long-press-effect/

I'm using this solution for handling the long tap event: https://alexdunn.org/2017/12/27/xamarin-tip-xamarin-forms-long-press-effect/

当我使用XAML时，它可以很好地工作，但是我只需要在后面使用代码即可.如何在后面的代码中将此命令添加到Image中?

It works fine when I use XAML, but I need to use code behind only. How can I add this command to the Image in the code behind?

以下是创建我的图片的代码:

Here is the code that creates my image:

var image = new Image
{
    ClassId = item.Path,
    Aspect = Aspect.AspectFill,
    Source = item.ThumbNailImage,
    Rotation = 90,
    Margin = 10,
    GestureRecognizers = { _tgr },
    //Command here, but how?
};

推荐答案

This documentation on Microsoft's website is very helpful in explaining how to set attached properties in code.

因此，根据示例，您的代码应如下所示:

So according to the example, your code should look something like this:

image.Effects.Add(new LongPressedEffect());
LongPressedEffect.SetCommand(image, myCommand);

myCommand是ICommand的地方.

这应该创建LongPressedEffect，将其添加到图像中，然后设置确定行为的附件ICommand.

This should create the LongPressedEffect, add it to the image, and then set the attached ICommand that determines the behavior.

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