使用 UITableView 向下钻取分层数据 [英] Drill down hierarchical data with UITableView

问题描述

我想构建一个应用来导航数据层次结构.此层次结构的结构类似于我在下图中显示的结构.结构的一个分支可以比其他分支具有更多的级别.

I want to build an app to navigate a data hierarchy. The structure of this hierarchy is something like the one I'm showing in the following image. A branch of the structure could have more levels than the others.

我想用这样的 TableView 深入研究这个结构:

I would like to drill-down this structure with TableViews like this:

    A > AA > AAB > AABA

或

    A > AB > ABA

我想知道的是，我的故事板中是否只能有一个 TableViewController 并重复使用它来显示每个新级别的数据?我不想在我的故事板中有一堆 tableviewcontrollers 链接在一起，因为我不确定我是否会有 3、4 或 100 级的层次结构.

What I would like to know is if I can have only one TableViewController in my storyboard and reuse it to display each new level of data? I don't want to have a bunch of tableviewcontrollers linked together in my storyboard because I am not sure if I will have a hierarchy of 3, 4, or 100 levels.

推荐答案

要递归到任意深度，只需在 storyboard 中绘制单个 VC，请使用 storyboard 绘制顶层:导航控制器，其根为表视图控制器.表 vc 应该是一个 UITableView 子类，并且在故事板中有一个故事板标识符(比如MyCustomTableVC").

To recurse to arbitrary depth with only a single VC painted in storyboard, use storyboard to paint the top level: a navigation controller with a table view controller at it's root. The table vc should be a UITableView subclass, and have a storyboard identifier in storyboard (say, "MyCustomTableVC").

为 MyCustomTableVC 提供一个公共属性(例如 ModelItem *node)，指示它应该在您的模型中显示哪个节点.

Give MyCustomTableVC a public property (say, ModelItem *node) that indicates which node in your model it should present.

代替storyboard segue，当表vc 获得didSelectRowAtIndexPath 时，让它创建自己的另一个实例...

Instead of storyboard segues, when the table vc gets didSelectRowAtIndexPath, have it create another instance of itself...

UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard"
                                                         bundle: nil];
// Imagine it's called MyCustomTableVC
MyCustomTableVC *newVC = (MyCustomTableVC*)[mainStoryboard 
                    instantiateViewControllerWithIdentifier: @"MyCustomTableVC"];

将newVC模型节点设置为选中的item(indexPath.row你模型中的item)，然后push到...

Set the newVC model node to the selected item (the item in your model at indexPath.row), and then push to it...

// making up a lot of stuff about your model here, but hopefully you get the idea...
newVC.node = [self.model objectAtIndex:indexPath.row];
[self.navigationController pushViewController:newVC animated:YES];

这种方法的好处是可以获得所有导航控制器行为:动画推送和弹出、后退按钮等.

This approach has the benefit of getting all the navigation controller behavior: animated pushes and pops, back buttons, etc.

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