Question

我使用以下代码绘制一条线

但是如果手指碰到同一条线，我想要删除那条线。任何想法？

function drawLine( event )
  if(event.phase == "ended") then
    line = display.newLine(event.xStart, event.yStart, event.x, event.y)
    line:setColor(255,0,0)
    line.width = 5
  end
end
Runtime:addEventListener("touch", drawLine)

Answer 1

简单。将线条设为传感器，一旦用户触摸线条，将其从组中移除或删除对象。

physics.addBody( line, { isSensor = true } ) 
someGroup:insert(line)
line.collision = removeLine   --some function that removes the line from the group someGroup
line:addEventListener(""touch"", line)

在电晕上绘制并擦除（擦除）线

1 个答案: