我使用 XCode 的 Master/Detail 模板编写了一个 Master/Detail 应用程序。启动应用程序后，主视图的导航按钮的标题只是“Master”。现在我想重命名该按钮，但不幸的是我不知道如何访问该按钮。 在appdelegate.m中有以下代码来初始化视图：
MasterViewController *masterViewController = [[MasterViewController alloc] init];
UINavigationController *masterNavigationController = [[UINavigationController alloc] initWithRootViewController:masterViewController];
DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil];
UINavigationController *detailNavigationController = [[UINavigationController alloc] initWithRootViewController:detailViewController]
我尝试了这些方法但没有成功：
masterViewController.navigationItem.title = @"newTitle";
or
masterNavigationController.navigationItem.title = @"newTitle";
由于我不确定按钮的名称是否只是 idt 后面视图的标题，我也尝试过：
masterViewController.title = @"newTitle";
什么都没起作用。但由于按钮的标题是“Master”，而且肯定不是我设置的，所以我相信一定有办法设置它。有谁知道该怎么做？
Just to show the button:
If you would have created Master/Detail application using Master/Detail Template, then go to your "MasterViewController.m" file and change the string "Master" as you wanted. See the below image it would be like this in your MasterViewController.m.
UPDATE:
and also change the barButtonItem name in the DetailViewController.m as like below. This will do the trick.
