ui布局

wallpaper/lib/pages/imgcategorypage/imgcategorypage_view.dart

@@ -59,6 +59,10 @@ class ImgCategoryPageView extends GetView {
                             height: 40,
                             width: double.infinity,
                             child: Row(
+                                mainAxisAlignment: MainAxisAlignment.center,
+                                mainAxisSize: MainAxisSize.max,
+                //                交叉轴的布局方式，对于column来说就是水平方向的布局方式
+                                crossAxisAlignment: CrossAxisAlignment.center,
                                 children: [
                                   IconButton(onPressed:() {
                                     print("download....");