objective-c - 如何仅在应用程序的特定位置放置标签栏？

Question

我想在我的应用程序的一个地方放置一个标签栏。从那里我可以加载一些其他的视图控制器，但就是这样。我不希望它用于我的整个应用程序。我阅读的所有示例都将标签栏控制器作为窗口的根视图控制器。

那么我该怎么做呢？谢谢！

Answer 1

他可能会对您有所帮助，考虑您的视图控制器是 HomeView，您将从那里推送一个标签栏控制器，HomeView 在下面的视图中加载：

#import "AppDelegate.h"
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    HomeView *homeview = [[HomeView alloc] initWithNibName:@"HomeView" bundle:nil];
    UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:homeview];
    self.window.rootViewController = navigation;
    [self.window makeKeyAndVisible];
    return YES;
}
@end

那么 HomeView 的 .h、.m 和 .xib 文件将如下所示：

在 HomeView.h

#import <UIKit/UIKit.h>

@interface HomeView : UIViewController
{
    IBOutlet UITabBarController *tabBarController;
}
-(IBAction)loadTabBar:(id)sender;
@end

HomeView.m 是：

@implementation HomeView

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

-(IBAction)loadTabBar:(id)sender
{
    [self.navigationController pushViewController:tabBarController animated:YES];

}
- (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.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

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

@end

并且 .xib 文件必须如下：

tabBarControllerIBOutlet必须连接到 .xib 文件上的 UITabBarController。还有UITabBarController两个名为FirstViewController,的视图控制器SecondViewController。此外， HomeView 必须在UINavigationController.

如果没有用这个答案澄清，我会更新详细解释。以上是使用XIB方法加载标签栏控制器的一种方式。

IBAction您可以通过在 HomeView.m 文件中更改 (button action) 中的内容来编写如下代码：

#import "HomeView.h"
#import "FirstViewController.h"
#import "SecondViewController.h"

@implementation HomeView

-(IBAction)loadTabBar:(id)sender
{
    FirstViewController *firstView = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
    SecondViewController *secondView = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
    tabBarController = [[UITabBarController alloc] init];
    tabBarController.viewControllers = [NSArray arrayWithObjects:firstView, secondView, nil];
    [self.navigationController pushViewController:tabBarController animated:YES];
}
@end

Answer 2

您必须在应用程序委托中制作 tabBar ，然后在您想使用它时添加

-(void)addTabBarController
{
    AppDelegate *appdelegte =(AppDelegate*)[[UIApplication sharedApplication]delegate];

    //[[[appdelegte navigationController] view]removeFromSuperview];

    [[appdelegte window]addSubview:[[appdelegte tabcontroller]view]];

    [[appdelegte tabcontroller]setSelectedIndex:0];
}