bugfix

src/core/4.widget.js

@@ -300,8 +300,10 @@
             this._isMounted = true;
             for (var key in this._children) {
                 var child = this._children[key];
-                !self.isEnabled() && child._setEnable(false);
+                if (layer === 0) {
-                !self.isValid() && child._setValid(false);
+                    !self.isEnabled() && child._setEnable(false);
+                    self.isValid() && child._setValid(false);
+                }
                 child._mount && child._mount(deep ? force : false, deep, lifeHook, predicate, layer + 1);
             }
             this._mountChildren && this._mountChildren();