NavigationController正在显示另一个视图控制器，而不是推送ViewController

Question

我有一个名为ViewController的主ViewController（如果我运行我的项目，它将首先运行）。 如果我按我的DetailViewController，它将显示我的ViewController视图。

这是我的部分代码：

AppDelegate.m

ViewController *viewController = [[ViewController alloc] initWithNibName:Nil bundle:nil];
    self.navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.rootViewController = self.navigationController;
    [self.window makeKeyAndVisible];

Viewcontroller.m

DetailViewController *detailVC = [[DetailViewController alloc] initWithNibName:nil bundle:NULL];
    [self.navigationController pushViewController:detailVC animated:YES];

Answer 1

在“按钮的操作”中实施此操作

DetailViewController *detailVC = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil];
[self.navigationController pushViewController:detailVC animated:YES];

您尚未使用其nib文件进行初始化

Answer 2

检查以下代码

DetailViewController *detailVC = [[DetailViewController alloc] init];
[self.navigationController pushViewController:detailVC animated:YES];