coona group 遍历

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--
-- main.lua
--
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local squares = display.newGroup()

local redSquare1 = display.newRect( squares, 0, 0, 40, 40 )
local redSquare2 = display.newRect( squares, 0, 0, 40, 40 )
local redSquare3 = display.newRect( squares, 0, 0, 40, 40 )
redSquare1:setFillColor( 1, 0, 0 )
redSquare2:setFillColor( 1, 0, 0 )
redSquare3:setFillColor( 1, 0, 0 )

--insert only the red squares into a table
local redSquares = { redSquare1, redSquare2, redSquare3 }

for i = 1, #redSquares do
    --manipulate the square at the current index (i)
    redSquares[i].x = redSquares[i].x + i*100
    redSquares[i]:scale( 0.5, 0.5 )
end