REPORT-119215 fix: 统一获取宽高的方法

packages/fineui/src/core/controller/controller.popover.js

@@ -58,8 +58,8 @@ export class PopoverController extends Controller {
             const popover = this.get(name);
             popover.show && popover.show();
             const render = this.getRender();
-            const W = Widget._renderEngine.createElement(render).width(),
-                H = Widget._renderEngine.createElement(render).height();
+            const elRect = Widget._renderEngine.createElement(render)[0].getBoundingClientRect();
+            const W = elRect.width, H = elRect.height;
             const w = popover.element.width(), h = popover.element.height();
             let left = (W - w) / 2, top = (H - h) / 2;
             if (left < 0) {