WPF Storyboard动画不工作

Question

我有我的自定义3D模型类（Model），其中包含Visual3D元素和Storyboard（sb）以保存与该模型相关的动画。我试图旋转使用Storyboard的Visual3D元素，但不幸的是它不起作用。

这里是代码片段

public void AnimationRotate(Model model, double duration, double startTime, RepeatBehavior behaviour) 
    { 

     //Rotate transform 3D 
     RotateTransform3D rotateTransform = new RotateTransform3D(); 

     //assign transform to the model 
     model.Visual3D.Transform = Transform3DHelper.CombineTransform(model.Visual3D.Transform, rotateTransform); 

     //define the rotation axis 
     AxisAngleRotation3D rotateAxis = new AxisAngleRotation3D(new Vector3D(0, 0, 1), 180); 

     //create 3D rotation animation 
     Rotation3DAnimation rotateAnimation = new Rotation3DAnimation(rotateAxis, TimeSpan.FromSeconds(0.5)); 

     //rotation behaviour 
     rotateAnimation.RepeatBehavior = behaviour; 

     //start animation from time 
     rotateAnimation.BeginTime = TimeSpan.FromSeconds(startTime); 

     //begin animation - THIS WORKS FINE 
     // rotateTransform.BeginAnimation(RotateTransform3D.RotationProperty, rotateAnimation); 

     Storyboard.SetTargetProperty(rotateAnimation, new PropertyPath(RotateTransform3D.RotationProperty)); 
     Storyboard.SetTarget(rotateAnimation, rotateTransform); 

     //add animation to the storyboard of the model 
     model.sb.Children.Add(rotateAnimation); 

     //BUT THIS APPROACH IS NOT WOKRING 
     model.sb.Begin(); 

    } 

Answer 1

问题在this answer进行说明。

而不是使用Storyboard.SetTarget您需要为变换注册一个名称并呼叫Storyboard.SetTargetName。此外，你必须调用Storyboard.Begin(FrameworkElement)并传递一个FrameworkElement作为参数（这里的this）。

RegisterName("RotateTransform", rotateTransform); 
Storyboard.SetTargetName(rotateAnimation, "RotateTransform"); 
... 
model.sb.Begin(this); 

---

而且我猜你需要的地方清除故事板的儿童，或创建每当动画开始一个新的故事板。