[Windows Phone] 如何通过代码实现Start Screen开始屏幕Tiles漂动效果和Layout变换效果？
作者：sinodragon21/Nathan
转载请注明出处 http://www.cnblogs.com/sinodragon21/archive/2012/07/20/2600948.html
一、需求说明
“搜狐新闻”的“频道”ParanormaItem页面：
长按其中的某个方块，它会浮动起来，拖动它到新的位置，整个Canvas会重新布局，还伴有Layout变换动画，和WindowsPhone自身的Start Screen功能类似。 
二、最终完成的Demo截图
三、源代码
下载页面 http://www.hugwp.com/forum.php?mod=viewthread&tid=3925 （最初发问是在卤面网，并且因为卤面网可以上传附件，所以源代码放在卤面网上了）
四、核心设计思路
1. FluidMoveBehavior (AppliesTo="Children")
1 <Grid x:Name="ContentPanel" Grid.Row="1" Margin="17,0,17,0"> 2 <ScrollViewer x:Name="scrollViewer" VerticalScrollBarVisibility="Disabled" HorizontalScrollBarVisibility="Disabled"> 3 <Canvas x:Name="canvasMain" VerticalAlignment="Top"> 4 <i:Interaction.Behaviors> 5 <el:FluidMoveBehavior AppliesTo="Children" Duration="0:0:1.5"> 6 <el:FluidMoveBehavior.EaseY> 7 <CubicEase EasingMode="EaseOut"/> 8 </el:FluidMoveBehavior.EaseY> 9 <el:FluidMoveBehavior.EaseX> 10 <CubicEase EasingMode="EaseOut"/> 11 </el:FluidMoveBehavior.EaseX> 12 </el:FluidMoveBehavior> 13 </i:Interaction.Behaviors> 14 <Border x:Name="firstBorder" Height="173" Width="173" Background="Red" Margin="0,0,20,20" Canvas.Top="0" Canvas.Left="0" ManipulationStarted="Border_ManipulationStarted_1" ManipulationDelta="Border_ManipulationDelta_1" ManipulationCompleted="Border_ManipulationCompleted_1" Hold="firstBorder_Hold_1" Tap="firstBorder_Tap_1"> 15 </Border> 16 <Border Height="173" Width="173" Background="#FF19A588" Margin="0,0,20,20" Canvas.Top="0" Canvas.Left="193" ManipulationStarted="Border_ManipulationStarted_1" ManipulationDelta="Border_ManipulationDelta_1" ManipulationCompleted="Border_ManipulationCompleted_1" Hold="firstBorder_Hold_1" Tap="firstBorder_Tap_1"> 17 </Border> 18 <Border Height="173" Width="173" Background="#FF19C854" Margin="0,0,20,20" Canvas.Top="193" Canvas.Left="0" ManipulationStarted="Border_ManipulationStarted_1" ManipulationDelta="Border_ManipulationDelta_1" ManipulationCompleted="Border_ManipulationCompleted_1" Hold="firstBorder_Hold_1" Tap="firstBorder_Tap_1"> 19 </Border> 20 </Canvas> 21 </ScrollViewer> 22 </Grid>
注意点一：需要Reference：Microsoft.Expression.Interactions 和 System.Windows.Interactivity。
注意点二：加入命名空间
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:el="clr-namespace:Microsoft.Expression.Interactivity.Layout;assembly=Microsoft.Expression.Interactions"
2. Canvas根据Children的index进行自动布局
1 private void repfreshCanvasChildernPosition() 2 { 3 foreach (UIElement ue in canvasMain.Children) 4 { 5 repositionCanvasChild(ue, canvasMain.Children.IndexOf(ue)); 6 } 7 }
1 private void repositionCanvasChild(UIElement ue, int newIndex) 2 { 3 Canvas.SetLeft(ue, (double)(newIndex % 2 * 193)); 4 Canvas.SetTop(ue, (double)(newIndex / 2 * 193)); 5 Border border = ue as Border; 6 TextBlock txb = new TextBlock() { Text = newIndex.ToString(), VerticalAlignment = VerticalAlignment.Center, HorizontalAlignment = HorizontalAlignment.Center, FontSize = 50 }; 7 border.Child = txb; 8 }
五、动画总结
动画的实现思路可以分为三种，按难度依次增加分别为：
一年级难度：Storyboard + Animation
二年级难度：VisualStateManager + VisualState
三年级难度：Built-in Windows Phone behaviors （例如：上面的FluidMoveBehavior）
六、相关链接
http://www.hugwp.com/thread-3925-1.html
http://www.hugwp.com/forum.php?mod=viewthread&tid=2012&reltid=3925&pre_pos=1&ext=CB
-完。
博文title英文：[Windows Phone] How to simulate floating tiles and LayoutTransform of Windows Phone Start Screen?
转载请注明出处 http://www.cnblogs.com/sinodragon21/archive/2012/07/20/2600948.html