REPORT-58207 系统原生文件选择器弹窗-mac插入图片弹窗时会出现文件选择器弹窗被遮盖的情况

designer-base/src/main/java/com/fr/design/gui/ifilechooser/JavaFxNativeFileChooser.java

@@ -67,7 +67,9 @@ public class JavaFxNativeFileChooser implements FileChooserProvider {
                     fileChooserParent = DesignerContext.getDesignerFrame();
                 }
                 Stage stage = showCoverStage(fileChooserParent);
-                stage.setAlwaysOnTop(true);
+                if (stage != null) {
+                    stage.setAlwaysOnTop(true);
+                }
                 try {
                     if (fileSelectionMode == FileSelectionMode.FILE || fileSelectionMode == FileSelectionMode.MULTIPLE_FILE) {
                         FileChooser fileChooser = new FileChooser();