I'm looking to programmatically advance an animation frame-by-frame from the first frame to last frame. I also want to listen for Spine events along the way (Start, End, Complete, and custom events).

Thanks to Mitch’s code example (from http://esotericsoftware.com/forum/Unity-Need-to-set-a-animation-to-a-specific-frame-4714), I am able to use SkeletonRender to programmatically move frame by frame.

But now I’m wondering if there is also a way to trigger start, end, complete events available in SkeletonAnimation? Being a newbie, I’m not sure if I can mix these two approaches (SkeletonRenderer and SkeletonAnimation), or if I'm on my own to figure out events using the SkeletonRenderer approach. All suggestions much appreciated.

Here's my adapted code from Mitch's example:

using UnityEngine;
using System.Collections;
using Spine;

[ExecuteInEditMode]
[RequireComponent(typeof(SkeletonRenderer))]
public class FrameByFrame : MonoBehaviour{

   [Range(0,232)] // between 0 and 232 frames 
   public float frame = 0;

   [SpineAnimation]
   public string animationName;
   Spine.Animation animation;

   SkeletonRenderer skeletonRenderer;
   Skeleton skeleton;

   void Start () {
      skeletonRenderer = GetComponent<SkeletonRenderer>();

  skeleton = skeletonRenderer.skeleton;

  // can I create an animation state and listen to its progress
  // while manually controlling the animation from skeletonRenderer.skeleton?
  // following does not work, not sure of the correct approach
  Spine.AnimationStateData stateData = new Spine.AnimationStateData(skeleton.data);
  Spine.AnimationState state = new Spine.AnimationState(stateData);
  state.SetAnimation(0, animationName, false);
  state.End += MyEndListener;
   }

   public void MyEndListener(Spine.AnimationState state, int trackIndex){
      Debug.Log(trackIndex + " " + state.GetCurrent(trackIndex) + ": end ");
   }

   void Update () {

  if (skeleton == null)
     return;

  if (animation == null) {
     animation = skeleton.Data.FindAnimation(animationName);
     if (animation == null)
        return;
  }

  int frameCount = (int) ((animation.duration * 30f));
  float jumpto = ((float)frame/frameCount) * animation.duration;  

  animation.Apply(skeleton, 0, jumpto, false, null);
  skeleton.Update(Time.deltaTime);
  skeleton.UpdateWorldTransform();
   }
}