I've created an Event Listener to spawn a ball when the screen is touched.
However, when ever I "touch" (click) the screen on the simulator, many balls are spawned. A new ball is spawned every time you move the mouse, and two times when you click. It's honestly quite bizarre.
1 2 3 4 5 6 7 8 | function spawnBall() ball = display.newImage("ball.png") ball.x = 180 ball.y = 80 physics.addBody( ball, { density=2.0, friction=0.5, bounce=0.3 } ) end Runtime:addEventListener( "touch", spawnBall ) |
Try this (haven't tried it myself so not sure if it works):
1 2 3 4 5 6 7 8 9 10 | function spawnBall(event) if event.phase == "began" then ball = display.newImage("ball.png") ball.x = 180 ball.y = 80 physics.addBody( ball, { density=2.0, friction=0.5, bounce=0.3 } ) end end Runtime:addEventListener( "touch", spawnBall ) |
@ codepunk_schmidt is right. the touch event listener is triggered many times for a single touch. but the began phase is triggered only once.
alternatively you can try using "tap" event.
1 2 3 4 5 6 7 8 | function spawnBall() ball = display.newImage("ball.png") ball.x = 180 ball.y = 80 physics.addBody( ball, { density=2.0, friction=0.5, bounce=0.3 } ) end Runtime:addEventListener( "tap", spawnBall ) |
views:1426 update：2011/10/11 15:24:38