example/lib/main.dart

@@ -30,7 +30,7 @@ class _MyAppState extends State<MyApp> {
                 border: Border.all(color: Colors.grey, width: 0.5),
               ),
               child: ImageWidget.loadNetImage(
-                  "https://s2.loli.net/2022/08/16/8JNPIXnV4qF2ZhR.jpg1",
+                  "https://s2.loli.net/2022/08/16/8JNPIXnV4qF2ZhR.jpg",
                   placeholder: ImageWidget.loadAssetImage("img")),
             ),
           ],

lib/widget/image_widget.dart

@@ -23,9 +23,7 @@ class ImageWidget {
 
     return OctoImage(
       image: CachedNetworkImageProvider(url ?? ""),
-      imageBuilder: type == ImageTransformerType.rect
-          ? MyOctoImageTransformer.radiusAvatar()
-          : MyOctoImageTransformer.circleAvatar(),
+      imageBuilder: MyOctoImageTransformer.getOctoImageBuilder(type),
       errorBuilder: ImageWidget.placeholderBuilder(errorWidget: placeholder),
       fit: fit,
       width: width,
@@ -33,7 +31,7 @@ class ImageWidget {
     );
   }
 
-  /// 加载网络图片widget
+  /// 加载本地图片widget
   static Widget loadAssetImage(
     String? image, {
     double? width,
@@ -58,6 +56,29 @@ class ImageWidget {
     );
   }
 
+  //缓存 本地图片
+  static void cacheAssetImage(
+    context,
+    String image, {
+    String format = 'png',
+  }) {
+    precacheImage(
+        AssetImage(ImageUtils.getImgPath(image, format: format)), context);
+  }
+
+  //缓存 网络图片
+  static void cacheNetImage(
+    context,
+    String url, {
+    String? domain,
+  }) {
+    var domainUrl = domain ?? ImageWidget.domain;
+    if (url.isNotEmpty && !url.startsWith("http")) {
+      url = domainUrl + url;
+    }
+    precacheImage(CachedNetworkImageProvider(url), context);
+  }
+
   static OctoErrorBuilder placeholderBuilder({
     Widget? errorWidget,
   }) {
@@ -97,6 +118,19 @@ class MyOctoImageTransformer {
           ),
         );
   }
+
+  // 根据type返回 OctoImageBuilder
+
+  static OctoImageBuilder getOctoImageBuilder(ImageTransformerType type) {
+    switch (type) {
+      case ImageTransformerType.rect:
+        return radiusAvatar();
+      case ImageTransformerType.circle:
+        return circleAvatar();
+      default:
+        return (context, child) => child;
+    }
+  }
 }
 
 enum ImageTransformerType {