在UINavigationController的驳回视图，并在同一时间同步 [英] Dismissing view in UINavigationController and at the same time syncing
问题描述
有一个NavigationController堆栈上两种观点：
There's two views on a NavigationController stack:
- 编辑ITEM-详细信息视图（=基本形式）
- 显示所有项目在表视图
我不知道是否有对我有任务的最佳实践：
I wonder if there are best practices for the task I have:
当用户点击了UINavigationController的酒吧BACK（而鉴于被 1 ）应用程序应该在服务器上更新的项目。
When the user taps "BACK" in the UINavigationController-bar (while being in view 1) the app should update the item on the server.
这不是那么难，但后面行动导致查看 2 和 2 不起来，到今天为止，因为更新的背景和WASN发生'T通过该表视图的数据GET请求之前完成。
That's not so difficult, but the BACK-action leads to view 2, and 2 is not up-to date, because the update happened in the background and wasn't through before the GET-request for the table view data finished.
所以为了有看法的 2 始终显示精确的数据，我有几种选择。都有点讨厌。（例如具有视图的ViewController 2 聊到服务器上的 1 的代表以及何时完成，或有一个更新发生的自动更新通知触发重新加载，...）
So in order to have view 2 always show accurate data, I have several options. All a bit annoying.. (for example having ViewController of view 2 talk to server on 1's behalf and update itself when completed, or having a "update happened" notification that triggers a reload, ...)
不过..什么是一个很好的最佳实践对于这种情况？
But.. what's a good best-practice for this case?
推荐答案
我想我会做的项目的中心位置。让我们把它叫做ItemsStore。 ItemsStore是有责任有一组最新的项目，并提供访问的项目是独生子。如果新数据到达，或旧的数据被保存它也激发通知。
I think I would make a central place for the Items. Lets call it a ItemsStore. ItemsStore is a singleton that has the responsibility to have a set of the latest items and give access to the items. It also fires notifications if new data arrives, or old data is saved.
在这种情况下：
- 查看2增加的数据存储。该店通知有
变化。 - 查看通知1更新。
- 查看2还询问ItemsStore到
将数据保存到服务器上。
我不会给装载的责任，并保存到控制器，它会变得丑陋和复杂的。
I would not give the responsibility of loading and saving to the controllers, it will get ugly and complex.
这篇关于在UINavigationController的驳回视图，并在同一时间同步的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
