1) remove magazine
2) lock slide back, confirm firearm is unloaded.
3) let slide go forward and repeat step 2 just to be sure (visually confirm no round in chamber and magazine is nowhere close to firearm).
4) push down takedown lever (and visually confirm again the firearm is not loaded).
5) release slide stop holding onto slide so it does not slam shut.
6) be sure firearm is pointed in safe direction (read not at any of your body parts or those of anyone else)
7) pull trigger
8) take slide off.
Long way of saying, yes, just pull the trigger when the slide is closed.
I tend to push the yellow lever down myself since it does force steps 1 and 2 above to visually check. However, in a pinch the alternate method works (it is essentially the same takedown procedure as with a Springfield XD or Glock type action).
Jeff