正如我在标题中提到的,我想将Navigation Controller
添加到已经有Tab Controller
的应用程序中。因此,试图让工作人员像这样page。无论如何,有些事情是错的。 UINavigationController
正在查看空白页面,即使有视图和一些库。
让我从stracht开始:
在我的AppDelegate
中,我正在设置标签栏控制器,如下所示:
@interface MYAppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) UITabBarController *tabBarController;
@end
这是.m文件:
@implementation MYAppDelegate
@synthesize window = _window;
@synthesize tabBarController = _tabBarController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
application.applicationSupportsShakeToEdit = YES;
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UINavigationController *viewController1 = [[[MYMainViewController alloc] init] initWithNibName: @"MYMainViewController" bundle:nil];
UIViewController *viewController2 = [[[MYPageViewController alloc] init] initWithNibName:@"MYPageViewController" bundle:nil];
UIViewController *viewController3 = [[[MYSearchViewController alloc] init] initWithNibName:@"MYSearchViewController" bundle:nil];
UIViewController *viewController4 = [[[MYPersonViewController alloc] init] initWithNibName:@"MYPersonViewController" bundle:nil];
// Initialize tabBarController and add ViewControllers
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects: viewController1, viewController2,
viewController3, viewController4, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
然后,这是MYMainViewController
实现,它是UINavigationController
:
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(@"%@", [self navigationController]); // Logging null
}
我的.xib文件有UINavigationController
,并且其中有一个视图。尽管如此,当我使用该应用程序时,还有空白页面和无标题导航栏。我做错了什么?
如果我能看到我的视图内容,我想使用后退按钮在两个视图控制器之间导航。
任何帮助或方法对我来说都很棒。
答案 0 :(得分:4)
尝试从xib中删除导航控制器,因此它只有视图控制器,然后以编程方式初始化导航控制器:
UIViewController *tmpViewController1 = [[[YourViewController alloc] init] initWithNibName:@"YourViewController" bundle:nil];
UINavigationController *viewController1 = [[UINavigationController alloc] initWithRootViewController:tmpViewController1];