navigationcontroller
navigationcontroller-
These last two operations are why we need a reference to both the NavItem collection and the NavigationController .
最后的两个操作，就是我们为什么需要NavItem集合和NavigationController引用的原因。
-
The NavigationController stores this navigation entry , but it is marked as " pending " because it doesn 't know for sure if the transition will take place ( maybe the host can not be resolved ) .
该de>NavigationControllerde>存储该导航项目，但它被标记为“等待”，因为它不知道是否会采取过渡（也许主机地址不能得到解析）。