touching变量移入SCN模块

修复iOS上经常卡掉第一个触摸导致后续不能和控件交互

Zframework/init.lua

@@ -71,7 +71,6 @@ local xOy=SCR.xOy
 local ITP=xOy.inverseTransformPoint
 
 local mx,my,mouseShow=-20,-20,false
-local touching--First touching ID(userdata)
 joysticks={}
 
 local devMode
@@ -181,8 +180,8 @@ end
 function love.touchpressed(id,x,y)
     mouseShow=false
     if SCN.swapping then return end
-    if not touching then
-        touching=id
+    if not SCN.mainTouchID then
+        SCN.mainTouchID=id
         WIDGET.unFocus(true)
         love.touchmoved(id,x,y,0,0)
     end
@@ -201,12 +200,12 @@ end
 function love.touchreleased(id,x,y)
     if SCN.swapping then return end
     x,y=ITP(xOy,x,y)
-    if id==touching then
+    if id==SCN.mainTouchID then
         WIDGET.press(x,y,1)
         WIDGET.release(x,y)
         WIDGET.cursorMove(x,y)
         WIDGET.unFocus()
-        touching=false
+        SCN.mainTouchID=false
     end
     if SCN.touchUp then SCN.touchUp(x,y)end
     if(x-lastX)^2+(y-lastY)^2<62 then