Question

您好我是iOS新手，我正在尝试在基于TabBar的应用中显示导航控制器。

这是我得到的： H档：

#import <UIKit/UIKit.h>



@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@property (strong, nonatomic) UITabBarController *tabBarController;

@property (strong, nonatomic) UINavigationController *navigationController;

@end

M档案：

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
    UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
    UIViewController *viewController3 = [[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];
    UIViewController *viewController4 = [[FourthViewController alloc] initWithNibName:@"FourthViewController" bundle:nil];
    UIViewController *viewController5 = [[FifthViewController alloc] initWithNibName:@"FifthViewController" bundle:nil];

    self.tabBarController = [[UITabBarController alloc] init];
    self.tabBarController.viewControllers = @[viewController1, viewController2,viewController3,viewController4,viewController5];



    self.navigationController = [[UINavigationController alloc] initWithRootViewController:viewController5];
    self.window.rootViewController = self.navigationController;
    [self.window makeKeyAndVisible];

    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;

}

Answer 1

不是将viewController5添加到标签栏控制器的视图控制器，而是添加导航控制器。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
    UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
    UIViewController *viewController3 = [[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];
    UIViewController *viewController4 = [[FourthViewController alloc] initWithNibName:@"FourthViewController" bundle:nil];
    UIViewController *viewController5 = [[FifthViewController alloc] initWithNibName:@"FifthViewController" bundle:nil];

    self.tabBarController = [[UITabBarController alloc] init];

    self.navigationController = [[UINavigationController alloc] initWithRootViewController:viewController5];
    self.tabBarController.viewControllers = @[viewController1, viewController2,viewController3,viewController4,self.navigationController];

    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;

}

Answer 2

这不起作用。将视图控制器与导航控制器混合使用，可以为您提供不带导航的视图控制器和不带视图控制器的导航控制器。每个vc都需要一个导航控制器，然后创建一个由这些导航控制器组成的数组。

以下是有效的答案：How to add UITabBarController programmatically (no xib file or storyboard)

TabBar和导航控制器

2 个答案: