NavigationController/TabBarController Transition

gistfile1.m

//
//  FASWindowState.m
//  FAS
//
//  Created by Rob Hayward on 14/11/2012.
//

#import "FASWindowState.h"
#import "FASWelcomeViewController.h"
#import "FASTeamsTabBarController.h"
#import "FASSettingsViewController.h"

@interface FASWindowState ()
{
  UIViewController *_rootViewController;
}

@end

@implementation FASWindowState

- (id)initWithWindow:(UIWindow *)window
{
  self = [super init];
  if (self) {
    _window = window;
    [self notifications];
    [self displayForLoginState];
  }
  return self;
}

#pragma mark - UI Setup

- (void)displayForLoginState
{
  FASUser *user = [[FASUserSession shared] user];
  if (!user) {
    [self presentSignedOutInterface];
  } else {
    [self presentSignedInInterface];
  }
}

#pragma mark - Notifications

- (void)notifications
{
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(userSignInComplete:) name:@"FASUserSignInDidCompleteNotification" object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(userSignUpComplete:) name:@"FASUserSignUpDidCompleteNotification" object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(settingsShow:) name:@"FASSettingsShouldShowNotification" object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(settingsDismiss:) name:@"FASSettingsShouldDismissNotification" object:nil];
}

- (void)userSignInComplete:(NSNotification *)notification
{
  FASTeamsTabBarController *controller = [[FASTeamsTabBarController alloc] initWithNibName:nil bundle:nil];
  [self updateWindowStateWithRootController:controller animated:YES track:YES];
}

- (void)userSignUpComplete:(NSNotification *)notification
{
  FASTeamsTabBarController *controller = [[FASTeamsTabBarController alloc] initWithNibName:nil bundle:nil];
  [controller setThanks:YES];
  [self updateWindowStateWithRootController:controller animated:YES track:YES];
}

- (void)settingsShow:(NSNotification *)notification
{
  FASSettingsViewController *viewController = [[FASSettingsViewController alloc] initWithNibName:nil bundle:nil];
  FASNavigationController *controller = [[FASNavigationController alloc] initWithRootViewController:viewController];
  [self updateWindowStateWithRootController:controller animated:YES track:NO];
}

- (void)settingsDismiss:(NSNotification *)notification
{
  [self updateWindowStateWithRootController:_rootViewController animated:YES track:NO];
}

#pragma mark - Actions

- (void)presentSignedOutInterface
{
  FASWelcomeViewController *welcome = [[FASWelcomeViewController alloc] initWithNibName:nil bundle:nil];
  FASNavigationController *controller = [[FASNavigationController alloc] initWithRootViewController:welcome];
  [self updateWindowStateWithRootController:controller animated:NO track:YES];
}

- (void)presentSignedInInterface
{
  FASTeamsTabBarController *controller = [[FASTeamsTabBarController alloc] initWithNibName:nil bundle:nil];
  [_window setRootViewController:controller];
  [self updateWindowStateWithRootController:controller animated:NO track:YES];
}

- (void)updateWindowStateWithRootController:(UIViewController *)viewController animated:(BOOL)animated track:(BOOL)track {
  
  if (!animated) {
    [_window setRootViewController:viewController];
  } else {
    [UIView transitionWithView:_window duration:0.5 options: UIViewAnimationOptionTransitionFlipFromLeft animations:^{
      _window.rootViewController = viewController;
    } completion:nil];
  }
  
  if (track) {
    _rootViewController = viewController;
  }
}

@end