【发布时间】：2014-02-09 12:20:50
【问题描述】：
我有一个由两部分组成的动画，它将一个对象滑到屏幕中间，暂停，然后滑到某个位置，将其缩小到零。运行情节提要时崩溃，不能对同一个情节提要中的同一个对象进行两次不同的翻译转换吗？
作为修复，我尝试将动画分成两个情节提要，但是我遇到了另一个问题。当第一部分完成时，卡片会重置回角落的起始位置，就好像动画从未发生过一样。然后我的第二个故事板会在几秒钟后启动。如果之后位置没有重置就可以了。
那么我怎样才能让它在一个故事板中运行，如下所示，或者如果我将它分成两个故事板，则在完成第 1 部分动画后不让它重置位置。
下面的代码只有在我从第 2 部分中删除第二个 translatetransform 动画时才有效。
public void SendCardToPile(UIElement bigCard, UIElement targetElement)
{
this.ZoomDropShadowImage.Visibility = Visibility.Collapsed;
// setup
var _Scale = new ScaleTransform
{
ScaleX = 1.0,
ScaleY = 1.0,
CenterX = 0,
CenterY = 0
};
this.ZoomItemCard.Visibility = Visibility.Visible;
var _Translate = new TranslateTransform();
var _Group = new TransformGroup();
_Group.Children.Add(_Scale);
_Group.Children.Add(_Translate);
bigCard.RenderTransform = _Group;
// animate
var _Storyboard = new Storyboard { };
var _Storyboard2 = new Storyboard { };
var transform = targetElement.TransformToVisual(Application.Current.RootVisual as FrameworkElement);
Point absolutePosition = transform.Transform(new Point(0, 0));
// Part 1 **************************
// translate (location X)
var _TranslateAnimateX = new DoubleAnimation
{
BeginTime = TimeSpan.FromSeconds(0),
From = -(Application.Current.Host.Content.ActualHeight / 2),
To = (Application.Current.Host.Content.ActualHeight - 250) / 2,
Duration = TimeSpan.FromSeconds(.25)
};
_Storyboard.Children.Add(_TranslateAnimateX);
Storyboard.SetTarget(_TranslateAnimateX, _Translate);
Storyboard.SetTargetProperty(_TranslateAnimateX,
new PropertyPath(TranslateTransform.XProperty));
// translate (location Y)
var _TranslateAnimateY = new DoubleAnimation
{
BeginTime = TimeSpan.FromSeconds(0),
From = (Application.Current.Host.Content.ActualWidth - 400) / 2,
To = (Application.Current.Host.Content.ActualWidth - 400) / 2,
Duration = TimeSpan.FromSeconds(.25)
};
_Storyboard.Children.Add(_TranslateAnimateY);
Storyboard.SetTarget(_TranslateAnimateY, _Translate);
Storyboard.SetTargetProperty(_TranslateAnimateY,
new PropertyPath(TranslateTransform.YProperty));
// Part 2 **************************
double stopDelay = 2;
double disappearSpeed = .5;
// scale X
var _ScaleAnimateX = new DoubleAnimation
{
BeginTime = TimeSpan.FromSeconds(stopDelay),
To = 0.0,
From = 1.0,
Duration = TimeSpan.FromSeconds(disappearSpeed)
};
_Storyboard.Children.Add(_ScaleAnimateX);
Storyboard.SetTarget(_ScaleAnimateX, _Scale);
Storyboard.SetTargetProperty(_ScaleAnimateX,
new PropertyPath(ScaleTransform.ScaleXProperty));
// scale Y
var _ScaleAnimateY = new DoubleAnimation
{
BeginTime = TimeSpan.FromSeconds(stopDelay),
To = 0.0,
From = 1.0,
Duration = TimeSpan.FromSeconds(disappearSpeed)
};
_Storyboard.Children.Add(_ScaleAnimateY);
Storyboard.SetTarget(_ScaleAnimateY, _Scale);
Storyboard.SetTargetProperty(_ScaleAnimateY,
new PropertyPath(ScaleTransform.ScaleYProperty));
// translate (location X)
var _TranslateAnimateX2 = new DoubleAnimation
{
BeginTime = TimeSpan.FromSeconds(stopDelay),
To = absolutePosition.X,
Duration = TimeSpan.FromSeconds(disappearSpeed)
};
_Storyboard.Children.Add(_TranslateAnimateX2);
Storyboard.SetTarget(_TranslateAnimateX2, _Translate);
Storyboard.SetTargetProperty(_TranslateAnimateX2,
new PropertyPath(TranslateTransform.XProperty));
// translate (location Y)
var _TranslateAnimateY2 = new DoubleAnimation
{
BeginTime = TimeSpan.FromSeconds(stopDelay),
To = absolutePosition.Y,
Duration = TimeSpan.FromSeconds(disappearSpeed)
};
_Storyboard.Children.Add(_TranslateAnimateY2);
Storyboard.SetTarget(_TranslateAnimateY2, _Translate);
Storyboard.SetTargetProperty(_TranslateAnimateY2,
new PropertyPath(TranslateTransform.YProperty));
// finalize
//EventHandler eh = null;
//eh = (s, args) =>
//{
// _Storyboard.Completed -= eh;
//};
//_Storyboard.Completed += eh;
_Storyboard.Begin();
}
【问题讨论】：
-
It crashes when running the storyboard, is it not possible to do two different translatetransforms on the same object in the same storyboard?是的，这是可能的。如果您可以发布崩溃时看到的确切错误，将会有所帮助。 -
它并没有真正提供任何有用的东西。它只是在 storyboard.begin 处中断： System.Windows.ni.dll 中发生了“System.InvalidOperationException”类型的异常，但未在用户代码中处理