允许多标记

SpineViewer/Exporter/ExportHelper.cs

@@ -25,7 +25,7 @@ namespace SpineViewer.Exporter
     /// <summary>
     /// 导出实现类标记
     /// </summary>
-    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
+    [AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = false)]
     public class ExportImplementationAttribute(ExportType exportType) : Attribute, IImplementationKey<ExportType>
     {
         public ExportType ImplementationKey { get; private set; } = exportType;

SpineViewer/ImplementationResolver.cs

@@ -32,8 +32,7 @@ namespace SpineViewer
             var impTypes = Assembly.GetExecutingAssembly().GetTypes().Where(t => baseType.IsAssignableFrom(t) && !t.IsAbstract);
             foreach (var type in impTypes)
             {
-                var attr = type.GetCustomAttribute<TAttr>();
-                if (attr is not null)
+                foreach (var attr in type.GetCustomAttributes<TAttr>())
                 {
                     var key = attr.ImplementationKey;
                     if (ImplementationTypes.ContainsKey(key))