Create movement like snake for iOS

Question

Hello,
i have this function to create a snake like movement
stage.addEventListener(Event.ENTER_FRAME, function()
          head.x = mouseX;
  head.y = mouseY;
  tail.graphics.clear();
  tail.graphics.lineStyle(3, 0x005e00);
  tail.graphics.moveTo(head.x, head.y);
          nodes[0] = {x:head.x, y:head.y};
          for (i=1; i<tail_nodes - 1; i++)
                    var rotation = Math.atan2(nodes[i].y - nodes[i - 1].y, nodes[i].x - nodes[i - 1].x);
                    var pos_x = nodes[i - 1].x + tail_len * Math.cos(rotation);
                    var pos_y = nodes[i - 1].y + tail_len * Math.sin(rotation);
                    nodes[i] = {x:pos_x, y:pos_y};
  tail.graphics.lineTo(pos_x, pos_y);
this work perfectly on computer and browser but when i export the ipa file for testing on my ipad it works jerkily (seems like low framerate).
What is wrong? the event.Enter_Frame? any suggestion to create a similar effect?
Thanks,
Stefano

Answer 1

you should use blitting for that.