onUpdate(tag: Tag, action: (obj: GameObj)=>void): KEventController
Register an event that runs every frame (~60 times per second) for all game objs with certain tag.since
v2000.1
// move every "tree" 120 pixels per second to the left, destroy it when it leaves screen // there'll be nothing to run if there's no "tree" obj in the scene onUpdate("tree", (tree) => { tree.move(-120, 0) if (tree.pos.x < 0) { destroy(tree) } })