Classes/AppDelegate.m

/*
     File: AppDelegate.m
 Abstract: The application delegate class used for installing our UITabBarController
  Version: 1.6
 
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 */
 
#import "AppDelegate.h"
#import "FeaturedViewController.h"
 
#define kCustomizeTabBar        0   // compile time option to turn on or off custom tab bar appearance
 
//  NSUserDefaults key values:
NSString *kTabBarOrderPrefKey   = @"kTabBarOrder";  // the ordering of the tabs
 
#pragma mark -
 
@interface AppDelegate () <UIApplicationDelegate, UITabBarControllerDelegate, UINavigationControllerDelegate>
 
@property (strong, nonatomic) UITabBarController *myTabBarController;
 
@end
 
#pragma mark -
 
@implementation AppDelegate
 
@synthesize myTabBarController, window;
 
- (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // add the tab bar controller's current view as a subview of the window
    myTabBarController = (UITabBarController *) self.window.rootViewController;
    
    // customize the More page's navigation bar color
    myTabBarController.moreNavigationController.navigationBar.tintColor = [UIColor grayColor];
    
    //  Adding controller from the Four.storyboard
    NSArray *classController = [myTabBarController viewControllers];
    NSMutableArray *controllerArray = [NSMutableArray arrayWithArray:classController];
    
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Four" bundle:nil];
    UIViewController *four = [storyboard instantiateInitialViewController];
    
    [controllerArray insertObject:four atIndex:3];
    
    [myTabBarController setViewControllers:controllerArray];
    
#if kCustomizeTabBar
    // set the bar tint color for iOS 7 and later
    if ([UIToolbar instancesRespondToSelector:@selector(setBarTintColor:)])
    {
        myTabBarController.tabBar.barTintColor = [UIColor darkGrayColor];
    }
    else
    {
        // set the bar tint color for iOS 6 and earlier
        myTabBarController.tabBar.tintColor = [UIColor darkGrayColor];
    }
    
    myTabBarController.tabBar.selectedImageTintColor = [UIColor yellowColor];
    
    // note:
    // 1) you can also apply additional custom appearance to UITabBar using:
    // "backgroundImage" and "selectionIndicatorImage"
    // 2) you can also customize the appearance of individual UITabBarItems as well.
#endif
    
    // restore the tab-order from prefs
    NSArray *classNames = [[NSUserDefaults standardUserDefaults] arrayForKey:kTabBarOrderPrefKey];
    if (classNames.count > 0)
    {
        NSMutableArray *controllers = [[NSMutableArray alloc] init];
        for (NSString *className in classNames)
        {
            for (UIViewController* controller in myTabBarController.viewControllers)
            {
                NSString* controllerClassName = nil;
                
                if ([controller isKindOfClass:[UINavigationController class]])
                {
                    controllerClassName = NSStringFromClass([[(UINavigationController*)controller topViewController] class]);
                }
                else
                {
                    controllerClassName = NSStringFromClass([controller class]);
                }
                
                if ([className isEqualToString:controllerClassName])
                {
                    [controllers addObject:controller];
                    break;
                }
            }
        }
        
        if (controllers.count == myTabBarController.viewControllers.count)
        {
            myTabBarController.viewControllers = controllers;
        }
        
    }
    
    // listen for changes in view controller from the More screen
    myTabBarController.moreNavigationController.delegate = self;
    
    // choose to make one of our view controllers ("FeaturedViewController"),
    // not movable/reorderable in More's edit screen
    //
    NSMutableArray *customizeableViewControllers = (NSMutableArray *)myTabBarController.viewControllers;
    for (UIViewController *viewController in customizeableViewControllers)
    {
        if ([viewController isKindOfClass:[FeaturedViewController class]])
        {
            [customizeableViewControllers removeObject:viewController];
            break;
        }
    }
    myTabBarController.customizableViewControllers = customizeableViewControllers;
    return YES;
}
 
- (void)saveTabOrder
{
    // store the tab-order to preferences
    //
    NSMutableArray *classNames = [[NSMutableArray alloc] init];
    for (UIViewController *controller in myTabBarController.viewControllers)
    {
        if ([controller isKindOfClass:[UINavigationController class]])
        {
            UINavigationController *navController = (UINavigationController *)controller;
            
            [classNames addObject:NSStringFromClass([navController.topViewController class])];
        }
        else
        {
            [classNames addObject:NSStringFromClass([controller class])];
        }
    }
    
    [[NSUserDefaults standardUserDefaults] setObject:classNames forKey:kTabBarOrderPrefKey];
    
}
 
- (void)applicationDidEnterBackground:(UIApplication *)application
{
    // this will store tab ordering.
    [self saveTabOrder];
}
 
 
#pragma mark - UINavigationControllerDelegate (More screen)
 
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if (viewController == (myTabBarController.moreNavigationController.viewControllers)[0])
    {
        // returned to the More page
    }
}
 
#pragma mark - State Restoration
 
- (BOOL)application:(UIApplication *)application shouldRestoreApplicationState:(NSCoder *)coder
{
    return YES;
}
 
- (BOOL)application:(UIApplication *)application shouldSaveApplicationState:(NSCoder *)coder
{
    return YES;
}
 
@end