问题
Hello I have a physics body created within sprite kit editor, here are the settings I've set for it:
The problem is, it isn't acting "static". If another physics body bumps into it "weirdly" (for lack of a better description) it often glitches, flying all over the screen, or when I had it pinned, rotating around the pinned location. -Shouldn't this act static and never move, unless it is explicitly moved in code? I need it to have an alpha mask physics body and stand completely still (it is the ground in my scene).
来源：https://stackoverflow.com/questions/28800222/static-physics-body-still-moving-with-contact