this.bgShape = new egret.Shape();
this.bgShape.width = w;
this.bgShape.height = h;
let $max: egret.Matrix = this.bgShape.matrix;
$max.a = $max.d = 0;
$max.c = $max.b = 1;
this.bgShape.graphics.beginGradientFill(egret.GradientType.LINEAR, [0xFF0000, 0xD7F0FC], [1.0, 1.0], [0, this.bgShape.height / 3], $max);
this.bgShape.graphics.drawRoundRect(0, 0, this.bgShape.width, this.bgShape.height, 40, 40);
this.bgShape.graphics.endFill();
结果:
注意 : 
原文：https://blog.51cto.com/aonaufly/2466113