maybe the '_drawNode' need to release.
- (void) dealloc {
//==============add=================
if (_drawNode) {
[_drawNode removeFromParent];
[_drawNode release];
}
//==============add=================
if (_ownsSkeletonData) spSkeletonData_dispose(_skeleton->data);
if (_atlas) spAtlas_dispose(_atlas);
spSkeleton_dispose(_skeleton);
FREE(_worldVertices);
[super dealloc];
}