无法以编程方式将 UINavigationController 添加到 TabBar 应用程序

Question

我有一个使用 TabBar 模板的应用程序。在其中一个视图控制器中，我想添加一个 uinavigationcontroller。我在.h文件中声明它；

#import <UIKit/UIKit.h>
#import "AnotherViewController.h"

@interface SecondViewController : UIViewController <UINavigationControllerDelegate> {
    UIButton *UIButton *gotoAnotherView;;
    AnotherViewController *anotherView;
    UINavigationController *navigationController;
}

@property(nonatomic,retain) UIButton *UIButton *gotoAnotherView;;
@property(nonatomic,retain) AnotherViewController *anotherView;
@property(nonatomic,retain) UINavigationController *navigationController;

-(void)buttonPressed:(id)sender;

@end

这是我的 .m 文件

#import "SecondViewController.h"


@implementation SecondViewController

@synthesize navigationController, anotherView, gotoAnotherView;


-(void)buttonPressed:(id)sender {

    anotherView = [[AnotherViewController alloc]init];
    [navigationController pushViewController:anotherView animated:YES];
}

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{

    navigationController = [[UINavigationController alloc ]initWithRootViewController:self];
    [navigationController.navigationBar setFrame:CGRectMake(0, 0, 320, 44)];

    [self.view addSubview:navigationController.navigationBar];

    gotoAnotherView = [[UIButton alloc] initWithFrame:CGRectMake(50, 50, 40, 40)]; //kategoributonlari

    UIImage *image = [UIImage imageNamed:@"1.png"];
    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
    imageView.frame = CGRectMake(110, 5, 100, 20);
    [self.view addSubview:imageView];

    [kategori1 setBackgroundImage:image forState:UIControlStateNormal];

    [kategori1 addTarget:self 
               action:@selector(buttonPressed:)
     forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:kategori1];

    [super viewDidLoad];

}




- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}


- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc. that aren't in use.
}


- (void)viewDidUnload
{
    [super viewDidUnload];

    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

但是我可以从导航栏中看到导航控制器更深一层（出现后退按钮），但主视图与我的 gotoAnotherView 按钮保持不变。

我认为我可能不会让导航控制器控制整个视图。

Answer 1

不要尝试在代码中执行此操作，而是编辑主窗口的 XIB（使用 UITabBarController）。将 UINavigationController 从库拖到选项卡栏上。这将为您创建一个带有 UINavigationController 的新栏项。选择嵌套在新 UINavigationController 中的 UIViewController，然后在“标识”选项卡上将“类”设置为视图控制器，然后在“属性”选项卡上指定要加载的 nib 文件的名称。

Answer 2

你不需要使用IB。您可以在代码中设置一切。首先创建视图控制器 tab1ViewController、tab2ViewController 等，然后使用 tab1ViewController 等根视图控制器创建导航控制器，然后将这些控制器添加到选项卡栏控制器。

这是一个示例：

UINavigationController *tab1NavigationController = [[UINavigationController alloc] initWithRootViewController:tab1ViewController];
UINavigationController *tab2NavigationController = [[UINavigationController alloc] initWithRootViewController:tab2ViewController];
UITabBarController rootViewController = [[UITabBarController alloc] init];
rootViewController.viewControllers = [NSArray arrayWithObjects:tab1NavigationController, tab2NavigationController, nil];
[tab1NavigationController release];
[tab2NavigationController release];