UITabBarController

#import <UIKit/UIKit.h>

@interface TabBarViewController : UITabBarController

+ (TabBarViewController *)sharedTabBarController;

@end


#import "TabBarViewController.h"
#import "FirstViewController.h"
#import "SecondViewController.h"
#import "ThirdViewController.h"

@interface TabBarViewController ()

@end

static TabBarViewController *_tabBarController;

@implementation TabBarViewController

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

+ (TabBarViewController *)sharedTabBarController
{
    if (_tabBarController == nil) {
        _tabBarController = [[TabBarViewController alloc]init];
    }
    return _tabBarController;
}

- (id)init
{
    self = [super init];
    if (self) {
        FirstViewController *firVC = [[FirstViewController alloc]init];
        firVC.title = @"First";
        UINavigationController *firNaviController = [[UINavigationController alloc]initWithRootViewController:firVC];
        
        SecondViewController *secVC = [[SecondViewController alloc]init];
        secVC.title = @"Second";
        UINavigationController *secNaviController = [[UINavigationController alloc]initWithRootViewController:secVC];
        
        ThirdViewController *thiVC = [[ThirdViewController alloc]init];
        thiVC.title = @"Third";
        UINavigationController *thiNaviController = [[UINavigationController alloc]initWithRootViewController:thiVC];
        
        firNaviController.tabBarItem = [[UITabBarItem alloc]initWithTitle:@"First" image:nil tag:0];
        secNaviController.tabBarItem = [[UITabBarItem alloc]initWithTitle:@"Second" image:nil tag:1];
        thiNaviController.tabBarItem = [[UITabBarItem alloc]initWithTitle:@"Third" image:nil tag:2];
        
        NSArray *controllerArray = [[NSArray alloc]initWithObjects:firNaviController,secNaviController,thiNaviController, nil];
        self.viewControllers = controllerArray;
    }
    return self;
}