layer.shadowColor < string>
Sets the color of a layers shadow. The color is expressed as a string in the CSS color format.
译:设置了层层阴影的颜色。颜色被表示为一个串在CSS颜色格式。
layerA = new Layer
layerA.shadowY = 1
layerA.shadowBlur = 4
layerA.shadowColor = "rgba(0,0,0,0.2)"