Merge branch 'master' of http://39.106.78.171:3000/shaojiahao/examSystem-Anxin

src/app/working-area/working-area.component.ts

@@ -397,15 +397,6 @@ export class WorkingAreaComponent extends EventEmitter implements OnInit, AfterV
       }
       this.canvasData.isChange = true;
     });
-
-    // todo 创建一个无限大的grid
-    const cell = new PIXI.Graphics();
-    cell.lineStyle(1, 0xff0000);
-        cell.beginFill(0x0000ff);
-    cell.drawRect(0, 0, 500, 500);
-
-    cell.endFill();
-    this.app.stage.addChild(cell);
   }
   /**
    * 重置画布