如何在iPad的SplitViewController弹出式导航栏中添加“后退按钮”？

Question

如何在iPad的splitview的弹出窗口(左窗格)上添加导航项目？这是iPad内置电子邮件应用程序中导航的邮箱/收件箱/草稿部分所在的位置。

Answer 1

将UISplitViewController的“主”窗格设置为UINavigationController，然后在其上按下具有navigationItem的UIViewController。

下面是一个示例设置：

UIViewController *masterController = [[MyCustomMasterController alloc] init…];
[[masterController navigationItem] setTitle:@"Root"];

UINavigationController *navController =
    [[UINavigationController alloc] initWithRootController:masterController];

UIViewController *detailController [[MyCustomDetailController alloc] init…];

UISplitViewController *splitView = [[UISplitViewController alloc] init];
[splitView setViewControllers:[NSArray arrayWithObjects:navController,
                                                        detailController,
                                                        nil]];

然后在后面：

UIViewController *subController = [[MyCustomSubController alloc] init…];
[[masterController navigationController] pushViewController:subController
                                                   animated:YES];

将新的UIViewController推入UINavigationController的堆栈将导致标题为“MyCustomMasterController”的后退按钮出现在MyCustomMasterController视图中。