feat:adjust mvvm api

js-framework/src/ui/view.ts

@@ -230,6 +230,9 @@ export abstract class View implements Modeling {
         block(this)
         return this
     }
+    in(group: Group) {
+        group.addChild(this)
+    }
 }
 
 export interface StackConfig extends LayoutConfig {

js-framework/src/vm/mvvm.ts

@@ -44,6 +44,7 @@ export abstract class ViewModel<M extends Object, V extends ViewHolder<M>> {
     attach(view: Group) {
         this.viewHolder.build(view)
         this.viewHolder.bind(this.state)
+        this.onAttached(this.state, this.viewHolder)
     }
 
     abstract onAttached(state: M, vh: V): void