Add delay to SKEmitter or SKReference to Scene editor

Question

I'm trying to sempificate some animation with scene kit. I want to achieve to have an SKEmitter to the scene after some delay. The SKEmitter has a limitated number of spawn emitter, so it is during just 1 second, but I want this animation after 2 secon of other animation. I can achieve this with code, but I would lear some semplification of Scene editor also if is a not mature tool (my opinion). Any idea?