ios - 如何防止 sceneFunc() 每次都清除上下文？

Question

在KonvaJS为任何 Shape 定义 sceneFunc() 将导致每次调用 draw() 时调用它，

1. Shape.draw()
2. layer.draw()
3. stage.draw()

问题是:如何防止 sceneFunc() 清除上下文并在之前的调用中保留过去的绘图？

Answer 1

您可以使用 clearBeforeDraw 属性:

var layer = new Konva.Layer({clearBeforeDraw: false});

来自文档:

set this property to false if you don't want to clear the canvas before each layer draw. The default value is true.