didPushNext method

@override void didPushNext()

调用时期：新的路由添加入栈，当前路由不再可见

Implementation

@override
void didPushNext() {
  /// 新的 widget 已经添加入栈，当前 widget 挂起
  _dispatchLifecycleState(LifecycleState.onPause);
  _dispatchLifecycleState(LifecycleState.onStop);
}