boundingBox() problem

Role::Role(const char* skeletonDataFile, const char* atlasFile) : CCSkeletonAnimation(skeletonDataFile,atlasFile)

I can't get the boundingBox by "boundingBox()" in the Role::init();could you help me test this situation? It can't get it indeed.what is the reason?

Has your skeleton been posed before trying to use the bounding box?

I find the node added must be updated once,It can get the bounding box.