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UITabBarController with a UIPopOverController with Multiple Views
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.

    UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
    viewController1.title = @"First";

    UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
    viewController2.title = @"Second";

    UITableViewController *tableView3 = [[tableViewController alloc]initWithNibName:@"tableViewController" bundle:nil];
    tableView3.title = @"Third";

    self.tabBarController = [[UITabBarController alloc] init];
    self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, tableView3 ,nil];
    self.tabBarController.delegate = self;
    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];

    [viewController1 release];
    [viewController2 release];
    [tableView3 release];

    return YES;
}

#pragma mark - TableView Delegate Methods

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    sendFeedback *sendEmailViewController = [[sendFeedback alloc]initWithNibName:@"sendFeedback" bundle:nil];

    downLoad *downloadFilelViewController = [[downLoad alloc]initWithNibName:@"downLoad" bundle:nil];

    if (indexPath.row == 0)
        [self presentModalViewController:sendEmailViewController animated:YES];
   else
        [self presentModalViewController:downloadFilelViewController animated:YES];

}

NSInteger index = [[self tabBarController] selectedIndex];

    CGRect buttonFrame = [[[[[self tabBarController] tabBar] subviews] objectAtIndex:index+1] frame];

    PopOverViewController *popoverView = [PopOverViewController new];

    popoverView.contentSizeForViewInPopover = CGSizeMake(250, 85);

    popover = [[UIPopoverController alloc]initWithContentViewController:popoverView];

    NSLog(@"X:%f Y:%f",buttonFrame.origin.x,buttonFrame.origin.y);

    [popover presentPopoverFromRect:buttonFrame inView:self.tabBarController.tabBar permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
}

PopOverController *popoverContentController = [[PopOverController alloc] init];
UINavigationController *navcon = [[UINavigationController alloc] initWithRootViewController:popoverContentController];
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContentController];

if (indexPath.row == 0)
    [self.navigationController pushViewController:sendEmailViewController animated:YES];
else
     [self.navigationController pushViewController:downloadFilelViewController animated:YES];