fix: app id修改，视频详情加可滑动

lib/utils/tools/help_img.dart

@@ -188,7 +188,12 @@ class HelpImg {
     // }
     return FadeInImage.assetNetwork(
         placeholder: isWidth==true ? ConstImg.spaceImgW : ConstImg.spaceImgH, image: path,
-      width: width, height: height, fit: BoxFit.cover
+      width: width, height: height, fit: BoxFit.cover,
+      imageErrorBuilder: (context, error, stackTrace) {
+        return HelpImg.asset(isWidth==true ? ConstImg.spaceImgW : ConstImg.spaceImgH, fit: BoxFit.fill,
+            width: width, height: height
+        );
+      },
     );
 
     return Image.network(