world 状态获取

world.go

@@ -46,6 +46,7 @@ type World interface {
 	AddSystem(sys ...ISystem)
 	Close()
 	Tick() int
+	Running() bool
 }
 
 type world struct {
@@ -73,7 +74,9 @@ func NewWorld(tick int) World {
 		quit:    make(chan struct{}),
 	}
 }
-
+func (w *world) Running() bool {
+	return w.state == Running
+}
 func (w *world) Tick() int {
 	return w.tick
 }