更新

lib/enum/MessageStatus.dart

@@ -0,0 +1,11 @@
+enum MessageStatus {
+  noNeed(0, '无需处理'),
+  pending(1, '待处理'),
+  completed(2, '已处理'),
+  timeout(3, '已超时');
+
+  final int code;
+  final String description;
+
+  const MessageStatus(this.code, this.description);
+}