ios-viewcontroller-containment

A simple UIViewController containment implementation of something akin to the standard iOS 7 UINavigationController and UIPageViewController classes except that it supports:

• interactive gesture-based paging in both directions
• ability to enable/disable wrapping (moving from page 0 to lastIndex and back)
• ability to enable/disable parallax paging

Usage #1

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    
    ContainerViewController *containerViewController = [ContainerViewController new];
    containerViewController.view.frame = self.window.bounds;
    [containerViewController setViewControllers:@[...];
    [self.window setRootViewController:containerViewController];
    
    [self.window makeKeyAndVisible];

    return YES;
}

Usage #2

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    
    ContainerViewController *containerViewController = [ContainerViewController new];
    containerViewController.view.frame = self.window.bounds;
    containerViewController.datasource = self;
    [containerViewController setInitialViewController:[UIViewController new]];
    [self.window setRootViewController:containerViewController];
    
    [self.window makeKeyAndVisible];

    return YES;
}

#pragma mark - ContainerViewController Datasource

- (UIViewController *)containerViewController:(ContainerViewController *)container viewControllerBeforeViewController:(UIViewController *)vc
{
    UIViewController * new = [UIViewController new];
    return new;
}

- (UIViewController *)containerViewController:(ContainerViewController *)container viewControllerAfterViewController:(UIViewController *)vc
{
    UIViewController * new = [UIViewController new];
    return new;
}

Configuration

self.parallaxEnabled = YES;
self.wrappingEnabled = YES;

TODO:

• There's a lot of duplicate logic in the finish and cancelTransition code, this should be anstracted & condensed