整个应用程序的 UISearchBar 相同吗? [英] Same UISearchBar for entire app?

问题描述

我见过很多应用都有一个始终位于应用顶部的通用搜索栏.我在一个视图控制器中实现了一个带有 UITableView 的 UISearchBar.我想在我的应用程序中的其他视图控制器上有相同的搜索栏.我如何将这些其他 UISearchBars 链接到我已经创建的那个?即，我如何配置这些其他 UISearchBars 以便它们返回相同的搜索结果并链接到相同的 UITableView?

I've seen a lot of apps that have a universal search bar that always remains at the top of the app. I have implemented a UISearchBar with a UITableView in one view controller. I want to have the same search bar on other view controllers in my app. How do I link these other UISearchBars to the one I have already created? I.e., how do I configure these other UISearchBars so that they return the same search results and link to the same UITableView?

推荐答案

嵌套视图控制器可能正是您所需要的.

Nested view controllers may be what you need.

定义一个顶视图控制器"，它管理一个包含搜索栏的顶视图"并将您的(表格)视图添加到顶视图(在顶视图上使用 -addSubview: )和关联的视图控制器到顶部视图控制器(在顶部 VC 中使用 -addChildViewController: 及其本身).

Define a "top view controller" that manages a "top view" containing a search bar and add your (table) views to the top view (using -addSubview: on the top view) and the associated view controller(s) to the top view controller (using -addChildViewController: in the top VC and on itself).

在 Interface Builder 中，您可以定义一个顶视图，并在其中定义一个容器视图".然后系统处理子视图和子视图控制器的插入.

In Interface Builder, you can define a top view and inside it a "container view." The system then handles the insertion of the subview and sub-view controller.

通过定义良好的视图控制器层次结构，您可以使您的应用程序设计更加合乎逻辑和简洁.我建议在深入编码之前花一些时间研究一个好的层次结构.

By defining a good view controller hierarchy, you make your app design more logical and clean. I’d recommend to take some time into investigating a good hierarchy before diving into coding.

最后一点:UISearchDisplayController 是一个对象(显然不是视图控制器)，它在视图控制器的视图上方叠加一个搜索栏.您可以简单地将它应用到最顶层的视图控制器(始终可见的视图控制器，如导航控制器)上方.值得研究一下，如果你还没有的话.;-)

A final note: the UISearchDisplayController is an object (apparently not a view controller) that superimposes a search bar above a view controller’s view. You might be able to simply apply it immediately above the top-most view controller (the one that is always visible, like a navigation controller). It’s worth looking into it, if you didn’t already. ;-)

• XYZTopViewController(管理一个 XYZTopView)
  • UINavigationController(管理由 Apple 定义的私有导航视图层次结构)
    • XYZFirstPageViewController(管理 XYZFirstPageView)(根"视图控制器)
    • XYZSecondPageViewController(管理XYZSecondPageView)(在需要时由导航控制器推送)
    • XYZTopViewController (managing a XYZTopView)
      • UINavigationController (managing a private navigation view hierarchy defined by Apple)
        • XYZFirstPageViewController (managing a XYZFirstPageView) (the "root" view controller)
        • XYZSecondPageViewController (managing a XYZSecondPageView) (pushed by nav. controller when you need it to)
        • XYZTopView
          • UISearchBar
            • (Apple 定义的私有导航视图层次结构)
            • XYZFirstPageView
              • (属于第一页/屏幕的视图层次结构)

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