白鹭引擎制作游戏背景main.ts实例

白鹭引擎
描述：实现矩形透明遮罩，绑定事件

    private createGameScene() {
        let sky = this.createBitmapByName("bg_jpg");
        this.addChild(sky);
        let stageW = this.stage.stageWidth;
        let stageH = this.stage.stageHeight;
        sky.width = stageW;
        sky.height = stageH;

        let topMask = new egret.Shape();
        topMask.graphics.beginFill(0x000000, 0.5);
        topMask.graphics.drawRect(0, 0, stageW, 172);
        topMask.graphics.endFill();
        topMask.y = 33;
        this.addChild(topMask);

        let icon = this.createBitmapByName("gameinfo_png");
        this.addChild(icon);
        icon.x = 26;
        icon.y = 33;

    }