上传图片上下居中

app/Distributor/Controllers/SiteBannerController.php

@@ -67,7 +67,7 @@ class SiteBannerController extends AdminDistController
             $form->text('title')->required();
             $form->text('subtitle');
             $form->cutImage("image_url", admin_trans_label('images'))
-                ->aspectRatio(1920/800)// 设置裁剪框比例
+                ->aspectRatio(1920/600)// 设置裁剪框比例
                 ->retainable()//禁止删OSS图
                 ->autoUpload()
                 ->uniqueName()