文档介绍：Animating your UI——界面动画
原文地址：-US/library/windows/apps/hh
目录
Animating your UI——界面动画 1
Animations available in the library 2
Page transition 3
Fade in/out 5
Crossfade 5
Pointer up/down 6
Expand/Collapse 6
Show/Hide panel 7
You can integrate the look and feel introduced in Windows 8 Release Preview into your Metro style app by using the Animation Library suite of Windows-provided animations. This article provides a summary of the animations and examples of typical scenarios handled by the Animation Library.
你可以将Windows 8 Release Preview中介绍的视觉和触觉整合进你的Metro Style app中，通过使用Windows-provided animations的Animation库套件。这篇文章提供一个animation的概要和典型情况下使用Animation库来控制的示例。
Use of the Animation Library animations provides these benefits:
Motions that align to Metro style animation principles
Fast, fluid transitions between UI states that inform but do not distract the user
Clearer visuals to show the user transitions within an app
使用Animation库动画具有以下这些好处：
一致的Metro风格的动画原则的议案。
快速，流利的界面切换，而不会使用户分心。
更加清晰的视图来显示用户在一个app中的切换。（）
For example, when an item is added to a list, instead of the new item instantly appearing in the list, the new item animates into place and the other items in the list animate to their new positions, making room for the added item. This makes the action clear to the user in a way that instantaneous transitions do not.