Egret 遮罩 官网案例_egret 倒计时遮罩

// 遮罩
module game {
    export class Test extends egret.DisplayObjectContainer {
        public constructor() {
            super();
            this.addEventListener(egret.Event.ADDED_TO_STAGE, this.onAddToStage, this);
        }
        private onAddToStage(event: egret.Event) {
            var square : egret.Shape = new egret.Shape();
            square.graphics.beginFill(0xff0000);
            square.graphics.drawRect(100,100,100,100);
            square.graphics.endFill();
            this.addChild(square);
 
            var circle:egret.Shape = new egret.Shape();
            circle.graphics.beginFill(0x0000ff);
            circle.graphics.drawCircle(150,150,25);
            circle.graphics.endFill();
            this.addChild(circle);
            square.mask = circle;
        }
    }
}

效果如下