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How to control UITabBar
@interface ViewController : UIViewController<UITabBarDelegate> {
    UITabBar *tabBar;
}
@property (strong, nonatomic) IBOutlet UITabBar *tabBar;
...

#import "ViewController.h"

@interface ViewController ()

@end

@implementation OfferViewController

@synthesize tabBar;
- (void)viewDidLoad
{
    [super viewDidLoad];

    UIImage *selectedImage0 = [UIImage imageNamed:@"HomeDB.png"];
    UIImage *unselectedImage0 = [UIImage imageNamed:@"HomeLB.png"];

    UIImage *selectedImage1 = [UIImage imageNamed:@"ScheduleDB.png"];
    UIImage *unselectedImage1 = [UIImage imageNamed:@"ScheduleLB.png"];

    UIImage *selectedImage2 = [UIImage imageNamed:@"BuildingsDB.png"];
    UIImage *unselectedImage2 = [UIImage imageNamed:@"BuildingsLB.png"];


    //UITabBar *tabBar = self.tabBar;
    UITabBarItem *item0 = [tabBar.items objectAtIndex:0];
    UITabBarItem *item1 = [tabBar.items objectAtIndex:1];
    UITabBarItem *item2 = [tabBar.items objectAtIndex:2];


    [item0 setFinishedSelectedImage:selectedImage0 withFinishedUnselectedImage:unselectedImage0];
    [item1 setFinishedSelectedImage:selectedImage1 withFinishedUnselectedImage:unselectedImage1];
    [item2 setFinishedSelectedImage:selectedImage2 withFinishedUnselectedImage:unselectedImage2];

    [super viewDidLoad];
}
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