无法将变量传递给swift中的spritekit中的场景

I'm currently having trouble with passing variables to a scene in spritekit (swift). In android when moving to a different activity, I just set the parameter to the Intent and simply get the variable. But since I'm new to spritekit and swift, i find it difficult. Is there a clear way to pass a variable to the scene ? I have a sample code below that I tested but did not work.I'm currently having trouble with passing varia