如何以编程方式添加导航控制器？

Question

我使用下面的代码，但未加载：

UIStoryboard * storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
self.mapViewController = [storyboard instantiateViewControllerWithIdentifier:@"MapViewController"];
self.navigationController = [[UINavigationController alloc]initWithRootViewController:self];

self.navigationBar = [[UINavigationBar alloc]init];
[self.view addSubview:self.navigationBar];

[self.navigationController.navigationController pushViewController:self.mapViewController animated:YES];

Answer 1

尝试如下

UIViewController *bbp=[[UIViewController alloc]initWithNibName:@"UIViewController" bundle:nil];
UINavigationController *passcodeNavigationController = [[UINavigationController alloc] initWithRootViewController:bbp];
// [self.navigationController presentModalViewController:passcodeNavigationController animated:YES];
  [self.navigationController pushViewController:passcodeNavigationController animated:YES];
  [passcodeNavigationController release];

Answer 2

将此代码添加到AppDelegate.m函数中的didFinishLaunchingWithOptions：

UIStoryboard *sb = [UIStoryboard storyboardWithName:@"YOUR_STORYBOARD_NAME" bundle:nil];
yourViewControllerClassName *vc = [sb instantiateViewControllerWithIdentifier:@"YOUR_VIEWCONTROLLER_ID"];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:vc];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];

yourViewControllerClassName是链接到viewController的.h和.m文件名。

YOUR_STORYBOARD_NAME是.storyboard文件的名称。例如，如果您的.storyboard文件被调用Main，请填写Main.storyboard。

YOUR_VIEWCONTROLLER_ID是您的veiwController的ID。您可以在Identity inspector中进行修改。（见照片）

希望这会有所帮助：）