BGM和BG模块设置成功（包括重复）返回true

Zframework/background.lua

@@ -34,7 +34,8 @@ function BG.setDefault(bg)
 end
 function BG.set(background)
 	if not background then background=BG.default end
-	if not BGs[background]or background==BG.cur or not SETTING.bg then return end
+	if not BGs[background]or not SETTING.bg then return end
+	if background~=BG.cur then
 		BG.discard()
 		BG.cur=background
 		background=BGs[background]
@@ -47,4 +48,6 @@ function BG.set(background)
 		BG.discard=	background.discard or NULL
 		BG.init()
 	end
+	return true
+end
 return BG

Zframework/bgm.lua

@@ -63,9 +63,10 @@ function BGM.init(list)
 			if SETTING.bgm==0 then
 				BGM.nowPlay=s
 				BGM.playing=Sources[s]
-				return
+				return true
 			end
-			if s and Sources[s]and BGM.nowPlay~=s then
+			if s and Sources[s]then
+				if BGM.nowPlay~=s then
 					if BGM.nowPlay then TASK.new(fadeOut,BGM.playing)end
 					TASK.removeTask_iterate(removeCurFadeOut,fadeOut,Sources[s])
 					TASK.removeTask_code(fadeIn)
@@ -75,6 +76,8 @@ function BGM.init(list)
 					BGM.playing=Sources[s]
 					BGM.playing:play()
 				end
+				return true
+			end
 		end
 		function BGM.freshVolume()
 			if BGM.playing then