• Windows Phone中使用Storyboard做类似 IOS 屏幕小白点的效果


    windows phone中做动画其实很方便的,可以使用Blend拖来拖去就做出一个简单的动画,下面做了一个 ios屏幕小白点的拖动效果,包括速度判断移动

    使用Blend生成以下代码

            <Storyboard x:Name="HandFunGTLSb"><!-- 向左滑动时动画 -->
                <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="gridHandFun">
                    <EasingDoubleKeyFrame KeyTime="0" Value="-170"/>
                    <EasingDoubleKeyFrame KeyTime="0:0:0.1" Value="-288"/>
                    <EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="-360"/>
                </DoubleAnimationUsingKeyFrames>
            </Storyboard>
            <Storyboard x:Name="HandFunGTRSb"><!-- 向右滑动时动画 -->
                <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="gridHandFun">
                    <EasingDoubleKeyFrame KeyTime="0" Value="-170"/>
                    <EasingDoubleKeyFrame KeyTime="0:0:0.1" Value="-100"/>
                    <EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
                </DoubleAnimationUsingKeyFrames>
            </Storyboard>

    被拖动的控件:

      <Grid Width="64" Height="444" Name="gridHandFun"
          HorizontalAlignment="Right"  Canvas.ZIndex="100"

          Margin="0,0,30,0"
          RenderTransformOrigin="0.5,0.5"
          ManipulationDelta="gridHandFun_ManipulationDelta"
          ManipulationCompleted="gridHandFun_ManipulationCompleted">

           <!--  ManipulationDelta   处理拖动事件 -->
    <!-- ManipulationCompleted 处理拖动完成事件 -->

             <Grid.RenderTransform> <CompositeTransform/> </Grid.RenderTransform> <!-- 手(以下换成自己的控件) --> <local:ToggleButton x:Name="tglbtnHand" Grid.Row="1" Tap="tglbtnHand_Tap" Tag="0" RenderTransformOrigin="0.5,0.5"> <local:ToggleButton.RenderTransform> <CompositeTransform/> </local:ToggleButton.RenderTransform> <Image Source="/Assets/HandFun/hand.png"/> <local:ToggleButton.TappedContent> <Image Source="/Assets/HandFun/hand1.png"/> </local:ToggleButton.TappedContent> </local:ToggleButton>

    </Grid>

    前台写完了,我们来处理后台事件:

            
        //处理拖动事件
        private void gridHandFun_ManipulationDelta(object sender, System.Windows.Input.ManipulationDeltaEventArgs e) { Grid grid = sender as Grid; CompositeTransform compTrans = grid.RenderTransform as CompositeTransform; compTrans.TranslateX += e.DeltaManipulation.Translation.X; compTrans.TranslateY += e.DeltaManipulation.Translation.Y; System.Diagnostics.Debug.WriteLine("X的值:{0},Y的值:{1}", compTrans.TranslateX, compTrans.TranslateY); }
           //处理拖动完成事件
    private
    void gridHandFun_ManipulationCompleted(object sender, System.Windows.Input.ManipulationCompletedEventArgs e) { CompositeTransform compTrans = gridHandFun.RenderTransform as CompositeTransform; double dCurrTranX = compTrans.TranslateX; double dCurrTranY = compTrans.TranslateY;     
          
           //获得手指滑动速度 x为水平滑动速度 y为垂直滑动速度 Point pSpleed
    = e.FinalVelocities.LinearVelocity; System.Diagnostics.Debug.WriteLine("速度:X的值:{0},Y的值:{1}", pSpleed.X, pSpleed.Y);

           //当向左滑行的速度小于-700时,把控件向左滑,播放向左的动画 -700可以自己调整,我测试了一上,这个速度都可以达到 if (pSpleed.X < -700) { HandFunGTLSb.Begin(); return; }

           //与上面相反
    if (pSpleed.X > 700) { HandFunGTRSb.Begin(); return; } //本次总运动距离 double dTranX = e.TotalManipulation.Translation.X; double dTranY = e.TotalManipulation.Translation.Y; System.Diagnostics.Debug.WriteLine("当前控件的CompositeTransform的X值:{0},Y的值:{1}", dCurrTranX, dCurrTranY); System.Diagnostics.Debug.WriteLine("Completed中X的值为:{0},Y的值为:{1}", dTranX, dTranY); if (dCurrTranX <= -170) {//往左 var vTimeLines = HandFunGTLSb.Children; DoubleAnimationUsingKeyFrames daukf = ((DoubleAnimationUsingKeyFrames)vTimeLines[0]); daukf.KeyFrames[0].Value = dCurrTranX; //播放动画启动位置 int idiff = (int)(360 - -dCurrTranX); if (idiff < 0) { daukf.KeyFrames[1].Value = (-360 + (idiff / 2)); } else if (idiff == 0) { return; } else if (idiff > 0) { daukf.KeyFrames[1].Value = (dCurrTranX + -idiff / 2); } HandFunGTLSb.Begin(); } else if (dCurrTranX > -170) {//往右 var vTimeLines = HandFunGTRSb.Children; DoubleAnimationUsingKeyFrames daukf = ((DoubleAnimationUsingKeyFrames)vTimeLines[0]); daukf.KeyFrames[0].Value = dCurrTranX; if (dCurrTranX == 0) return; else daukf.KeyFrames[1].Value = (dCurrTranX / 2); HandFunGTRSb.Begin(); } }

    这样就可以出现那种效果了

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  • 原文地址:https://www.cnblogs.com/LeeYZ/p/3759933.html
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