* UISymbolButton: 设置完图片即可更新

SunnyUI/Controls/UIHeaderButton.cs

@@ -343,11 +343,14 @@ namespace Sunny.UI
         {
             get => image;
             set
+            {
+                if (image != value)
                 {
                     image = value;
                     Invalidate();
                 }
             }
+        }
 
         private int _symbol = FontAwesomeIcons.fa_check;
 

SunnyUI/Controls/UISymbolButton.cs

@@ -150,11 +150,21 @@ namespace Sunny.UI
             base.SetStyleColor(uiColor);
         }
 
+        private Image image;
+
         [DefaultValue(null)]
         [Description("图片"), Category("SunnyUI")]
         public Image Image
         {
-            get; set;
+            get => image;
+            set
+            {
+                if (image != value)
+                {
+                    image = value;
+                    Invalidate();
+                }
+            }
         }
 
         private ContentAlignment imageAlign = ContentAlignment.MiddleCenter;