如何在Xamarin.Forms中设置不透明度动画

问题描述

我想知道如何对屏幕上可见元素的不透明度进行动画处理.例如，对于Entry，我可以了解以下内容:

I wonder how to Animate opacity of elements visible on screen. For example for Entry I got to this:

this.Animate("", d =>
{
   Debug.WriteLine("anim:" + d);
   Username.Opacity = (AnimationTime - d) / AnimationTime;
}, 0, AnimationTime);

但是我想知道是否有更简单的方法.不幸的是，Animate方法的文献资料很少.

but I wonder if there is easier way. Unfortunately Animate method is poorly documented.

推荐答案

您可以尝试FadeTo扩展方法:-

You could try the FadeTo extension method :-

http://iosapi.xamarin.com/index.aspx?link=M%3AXam​​arin.Forms.ViewExtensions.FadeTo%28Xamarin.Forms.VisualElement%2CSystem.Double%2CSystem. UInt32％2CXamarin.Forms.Easing％29

也可以应用其他动画:-

There are other animations that can be applied too :-

http://iosapi.xamarin.com/index.aspx?link = T％3AXam​​arin.Forms.ViewExtensions％2F *

您还可以找到以下有用的参考资料:-

You may also find the following a useful reference :-

http://www.xforms-kickstarter.com /#animations-puting your-app-in-motion

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