图片查看页面ui

wallpaper/lib/pages/imgscanpage/imgscanpage_view.dart

@@ -18,7 +18,9 @@ class ImgScanPageView extends GetView {
       appBar: AppBar(
         title: const Text("查看大图"),
       ),
-      body: Container(
+      body: Stack(
+        children: [
+          Container(
               child: PhotoViewGallery.builder(
                     scrollPhysics: const BouncingScrollPhysics(),
                     builder: (BuildContext context, int index) {
@@ -27,6 +29,9 @@ class ImgScanPageView extends GetView {
                         initialScale: PhotoViewComputedScale.contained * 0.8,
                         minScale: PhotoViewComputedScale.contained*0.4,
                         maxScale: PhotoViewComputedScale.contained * 4,
+                        onTapDown: (context, details, controllerValue) {
+                          print("touch down...");
+                        },
                         // heroAttributes: PhotoViewHeroAttributes(tag: galleryItems[index].id),
                       );
                     },
@@ -45,12 +50,27 @@ class ImgScanPageView extends GetView {
                     // backgroundDecoration: widget.backgroundDecoration,
                     // pageController: widget.pageController,
                     onPageChanged: onPageChanged,
+                    
+
               )
           ),
+          Align(
+              alignment: Alignment.bottomCenter,
+              child: Container(
+                child: IconButton(onPressed: (){
+                        print("download.....");
+                        }, icon: Icon(Icons.download),color: Colors.white,
+                     ),
+                     height: 90,
+                     width: 90,
+              )
+          ),
+        ],
+      ),
     );
   }
 
   void onPageChanged(int index){
-    print("点击了图片....");
+    print("切换了图片....");
   }
 }