Type Number Object GroupObject Library display.* Revision 2017.3060 Keywords group children, child count, group count See also Group Programming (guide)
Retrieve the number of children in a group. You access the children by integer (whole number) index.
local group = display.newGroup()
group:insert( rect1 ) -- assume rect1 is an existing display object
group:insert( rect2 ) -- assume rect2 is an existing display object
for i=1,group.numChildren do
local child = group[i]
local description = (child.isVisible and "visible") or "not visible"
print( "child["..i.."] is " .. description )
end