fix

Assets/UIWidgets/Tests/CanvasAndLayers.cs

             {
                 if (GUI.Button(new UnityEngine.Rect(20, 50, 100, 20), "Image 1"))
                 {
-                    _stream =
-                        LoadImage(
+                    LoadImage(
-                    _stream =
-                        LoadImage(
+                    LoadImage(
-                    _stream =
-                        LoadImage(
+                    LoadImage(
                             "http://a.hiphotos.baidu.com/image/pic/item/2f738bd4b31c8701c1e721dd2a7f9e2f0708ffbc.jpg"); 
                 }
             }
             }
-            
-            Debug.Log("currentSize: " + PaintingBinding.instance.imageCache.currentSize);
-            Debug.Log("currentSizeBytes: " + PaintingBinding.instance.imageCache.currentSizeBytes);
-            Debug.Log("maxSizeBytes: " + PaintingBinding.instance.imageCache.maximumSizeBytes);
         }
         
         private void OnEnable() {
 
-        private ImageStream LoadImage(string url)
+        private void LoadImage(string url)
-            var stream = networkImage.resolve(imageConfig);
-            return stream;
+            _stream = networkImage.resolve(imageConfig);
         }
 
         void drawPloygon4() {