在选项卡栏控制器中选择时以模态显示视图控制器

Question

I have this pretty standard Tab Bar Controller setup:

UIViewController *homeViewController = [[PLOTHomeViewController alloc] init];
UIViewController *upcomingViewController = [[PLOTUpcomingViewController alloc] init];
UIViewController *checkInViewController = [[PLOTCheckInViewController alloc] init];
UIViewController *watchlistViewController = [[PLOTWatchlistViewController alloc] init];
UIViewController *profileViewController = [[PLOTProfileViewController alloc] init];

PLOTNavigationController *homeNavVC = [[PLOTNavigationController alloc] initWithRootViewController:homeViewController];
PLOTNavigationController *upcomingNavVC = [[PLOTNavigationController alloc] initWithRootViewController:upcomingViewController];
PLOTNavigationController *checkInNavVC = [[PLOTNavigationController alloc] initWithRootViewController:checkInViewController];
PLOTNavigationController *watchlistNavVC = [[PLOTNavigationController alloc] initWithRootViewController:watchlistViewController];
PLOTNavigationController *profileNavVC = [[PLOTNavigationController alloc] initWithRootViewController:profileViewController];

self.tabBarController = [[PLOTTabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:homeNavVC, upcomingNavVC, checkInNavVC, watchlistNavVC, profileNavVC, nil];

However, I'm trying to work out how, when the user selects the middle tab (checkInViewController), I can present that View Controller modally (fullscreen)? I'd maybe imagine something in the viewDidAppear method in that VC, but I'm not sure if you can present yourself modally, if you're a VC? What's the best approach for this?

Answer 1

You can use

[self presentViewController:checkInViewController animated:YES completion:nil];

Then hide the tab and navigation bars in the destination view controller's viewWillAppear:

-(void)viewWillAppear:(BOOL)animated {
    [self.navigationController setNavigationBarHidden:YES animated:YES];
    [self.tabBarController.tabBar setHidden:YES];
}