如何在使用splitViewController的iPad上引用detailViewController [英] How do I reference the detailViewController on an iPad that is using a splitViewController

问题描述

我在XCode 4.3和IOS 5上设置了一个项目，没有使用创建新项目对话框中默认的主/细节设置的iPhone和iPad的故事板。

I setup a project on XCode 4.3 and IOS 5 without using storyboards for both iPhone and iPad using the default Master/Detail setup from the create new project dialog.

iPhone端工作得很好。我在tableView和detailViewController屏幕中选择一个选项，根据选择更新新信息。

The iPhone side works just fine. I select an option in the tableView and the detailViewController screen updates with the new information based on the selection.

我的didSelectRowAtIndexPath实现是：

My implementation of didSelectRowAtIndexPath is:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {  
        Shapes *currentShape = [self.shapesArray objectAtIndex:indexPath.row];  
        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {  
            if (!self.detailViewController) {  
                self.detailViewController = [[[GeoDetailViewController alloc] initWithNibName:@"GeoDetailViewController_iPhone" bundle:nil] autorelease];  
            }  
            [self.navigationController pushViewController:self.detailViewController animated:YES];  
            [self.detailViewController populateDisplay:currentShape];  
        } else {  
            [self.detailViewController populateDisplay:currentShape];  
        }  
}  

然而，当我在iPad上运行时，我自己。 detailViewController不存在。所以显示不会更新。我仍然可以在iPad屏幕上看到它，我无法改变任何内容。如何在代码中引用它以便我可以更改显示的内容？

However, when I run on the iPad, self.detailViewController does not exist. so the display doesn't update. I can still see it on the iPad screen, I just can't change anything on it. How do I reference it in the code so I can make changes to what is displayed?

推荐答案

我对模板实现感到困惑主/细节视图。我问了一个类似的问题：

I was puzzled by the templates implementation of the Master/Detail view. I asked a similar question:

如何使用MasterDetail应用程序模板更新DetailView

您可以使用detailItem（id - 因此您可以传入引用）属性默认情况下为DetailViewController类设置。

You can use the detailItem (id - so you can pass in a reference) property that is set up by default for the DetailViewController class.

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